Wink of knowledge: Ethylene Glycol-Water – VLO

Wink of knowledge: Ethylene Glycol-Water – VLO

Wink of knowledge: Ethylene Glycol-Water Mixture – VLO Density and Viscosity Meter for Liquids

Volume 2 | Number 1

Why this test?

The measurements carried out are intended to show, in a series of various quick tests, how the concentration of two liquids can be controlled in operation using the VLO density and viscosity sensor.
The present measurement results show the top performance of our small sensor.

What is a wink of knowledge?

Do you sometimes need to quickly measure, draw or tinker with something?
The speed with which you arrive at the result counts more than the perfect (scientific) approach.
For this reason, we’ve introduced a wink of knowledge.
Science with a wink, so to speak.
We don’t want to prove anything scientifically, but quickly demonstrate something pragmatically.
If you’re interested, we’d be happy to discuss these results in more detail with you and your project.

What liquids were used?

  • Ethylene glycol

    Carl Roth (art. no.: 2441.4)
  • Deionised water

Density measurement

The density was measured using the VLO density and viscosity sensor for liquids.
For this purpose, the listed mixtures were passed through the sensor at a constant flow rate.
By means of the logging function, one measured value per second was recorded for density, temperature, pressure and reference density.

Ethylene glycol (C2H6O2)

1,113.37 kg/m³ 2

at 20 °C, 1.01325 bar abs

Water (H2O)

998.21 kg/m³

at 20 °C, 1.01325 bar abs

The TrueDyne sensor

The VLO-M1 viscosity sensor measures the viscosity of a liquid in a microelectromechanical system (MEMS system).
The medium is guided in the sensor via a pressure gradient to the so-called omega chip, which contains an omega-shaped microchannel.
This vibronic measuring system generates the measured values by setting a silicon tube in the chip into resonant vibration and analysing this.
This is because the vibration quality depends on the viscosity of the liquid in the microchannel.
At the same time – and independent of the viscosity – the density of the medium can be determined via the frequency of the microchannel.
Since temperature influences both viscosity and density, the temperature of the medium is also recorded in the chip in real time.
In this way, the temperature effect can be compensated for.

The measuring system in the submillimetre range enables the compact construction of the sensor.
Measuring just 80 x 30 x 15 mm (36,000 mm³), there is room for it in even the tightest of spaces.
The measured values reach the higher-level system via an RS232 interface and in the ASCII command protocol in the TrueDyne Sensors standard.

TrueDyne_DLO-M1_VLO-M1_right
VLO density and viscosity sensor for liquids

Procedure

  1. Purification of ethylene glycol and determination of purity through density measurement with a laboratory density meter DSA 5000 M (Anton Paar)
  2. Mixing of water on a laboratory scale (Kern, PCB 1000-2) to produce different target concentrations (w/w) as a reference.
  3. Inserting the viscosity sensor into the measurement setup according to the sketch
  4. Pumping the ethylene glycol-water mixture through the viscosity sensor

Measurement setup

  1. Ethylene glycol / water mixture
  2. Peristaltic pump (Ismatec, ISM930C)
  3. Temperature basin (Julabo, F 34)
  4. VLO density and viscosity sensor
  5. Evaluation calculator
  6. Hose (media supply)
  7. Hose (media removal)
Measurement setup: VLO sensor | ethylene glycol-water
Figure 1 – Measurement setup

Results

The following table shows the measured values obtained for ethylene glycol concentrations of between 0 and 60%.

Ethylene glycol water_table_measured_values concentrations
Table 1 – Measured values for concentrations of between 0 and 60%

In the following graph, the measurement deviation is plotted against the reference ethylene glycol concentration.
Over the entire measuring range (0 to 60% ethylene glycol), the maximum concentration deviation is less than 0.4%.

In addition to the direct output of the ethylene glycol concentration, other applications are conceivable, such as the direct output of the freezing point of the ethylene glycol-water mixture.

Graphic_Ethylene glycol-water mixture
Figure 2 – Measurement deviation in the tested measurement range between 0 and 60%

Sensors that might interest you

Applications that might interest you

Monitoring fuel concentrations
From volume (l)

to mass (kg)

Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packaging

Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

read more
Quality monitoring of fuels

Quality monitoring of fuels

The density of a liquid depends on its composition. If different liquids are mixed, the correct mixing ratio can be checked with density measurements.

read more

Welcome to 2021

Welcome to 2021

Welcome to 2021

It is a pleasure for us to be at your disposal again this year for exciting applications
with our sensors.

Do you currently have a question about the density and or viscosity of media?
Contact us! We look forward to hearing from you

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Christmas 2020

Christmas 2020

Vacation close-down 2020/21

We treat ourselves to a little time off and have closed our office from 12/24/2020 to 01/03/2021.

On this way we wish our customers, partners and friends relaxing, healthy holidays and a happy new year!

We will be happy to be at your disposal again from January 4, 2021.

The team of Truedyne Sensors AG

Photo by Markus Spiske on Unsplash

Congratulations. Philipp Gurtner – Electronics engineer (EFZ) – best of the year

Congratulations. Philipp Gurtner – Electronics engineer (EFZ) – best of the year

LoRaWan Sensorinterface
LoRaWan Sensor interface – IPA result

Mobile sensor interface for the DGF-I1 gas density sensor

We congratulate Philipp Gurtner on passing his EFZ electronics engineer exam as the best of his year!

TrueDyne: Philipp, what was your thesis (IPA) about?
Philipp: In my IPA I developed a mobile sensor interface for the DGF-I1 gas density sensor. The sensor interface runs the sensor with batteries and reads out the current process values. These are sent via the low-power IoT protocol LoRaWAN. Thus, the sensor interface with sensor can act as a self-sufficient measuring station and wirelessly monitor a plant.

My task was to develop an electronic system that handles the battery management, reads the measurement data, interprets them and sends them to a cloud platform.

TrueDyne: Why did you choose TrueDyne Sensors AG for your training?
Philipp: TrueDyne gave me good support, many possibilities and freedom. The team spirit is very motivating for the daily work.

TrueDyne: What did you enjoy most about your project?
Philipp: The many different tasks in the project brought many exciting things. I found it great to get to know many new things and to work with radio technology.

TrueDyne: What was the biggest challenge in your project?
Philipp: My biggest challenge was the software. I had to go through a steep learning curve in real-time operating systems. This allowed me to learn a lot and it was still a lot of fun when it worked.

TrueDyne: In which direction are your future plans going?
Philipp: At the moment I am looking forward to another great time at TrueDyne with many interesting projects. In the near future I would like to study electrical engineering.

Applications that might interest you

Monitoring of fuel concentrations
From volume (l)

to mass (kg)

Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packaging

Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

Wink of knowledge: Air & Nitrogen (N2) – DGF-I1

Wink of knowledge: Air & Nitrogen (N2) – DGF-I1

Wink of knowledge: Air & N2 – DGF-I1 density sensor for gases

Year 1 | Number 1

Why this test?

The measurements performed in a series of various quick tests are intended to demonstrate how precisely the DGF-I1 density sensor for gases works in operation.
Since air and nitrogen have a similar density range, the test results confirm our expectations for the DGF-I1 density sensor.

What is a wink of knowledge?

Do you sometimes need to measure, draw or make something quickly?
And the speed at which you get to the result counts more than the perfect (scientific) approach?
For this reason, we have introduced a wink of knowledge.
Science with a twinkle in its eye, so to speak.
We’re not looking to prove something scientifically, but rather to quickly demonstrate something pragmatically. If you’re interested, we would be happy to discuss these results in more detail with you and your project.

Which gases were used?

  • Nitrogen 4.5

    PanGas (material number 6430112)

  • Dry air

    Air compressor

Density measurement

The density was measured with the gas density sensor DGF-I1.
For this purpose, the listed gases were passed through the sensor for a period of time at a constant flow rate.
A logging function was used to record a reading for the density, temperature, pressure and reference density once every second.

Nitrogen (N2)

1.2503 kg/m³

at 0 °C, 1.01325 bar abs

Dry air (Air)

1.292 kg/m³

at 0 °C, 1.01325 bar abs

The TrueDyne sensor

With a diameter of 33.5 mm and a length of 63 mm, the DGF-I1 density sensor has a very compact design and fits into the smallest of spaces.
It is screwed directly into the gas pipe or gas tank with the integrated connection; a filter protects against contamination.
The readings are transmitted to the higher-level system via an RS485 interface.
The response time of 5 seconds makes a density measurement directly in the process possible – the measurement does not have to be interrupted.

Permissible media:

Hydrogen (H2) • Helium (He) • Nitrogen (N2) • Oxygen (O2) • Carbon dioxide (CO2) • Argon (Ar)

Media which differ from the media listed above can be used after individual clarification, if necessary.
For example Neon (Ne) and Krypton (Kr).

 

DGF-I1 density sensor with size indication
DGF-I1 density sensor for gases
Max.
deviation:

Density: <0.1 kg/m³

Temperature: <0.8 °C

Pressure: <0.04 bar

With field adjustment density <0.05 kg/m³

Repeatability:

Density: <0.015 kg/m³

Temperature: <0.06 °C

Pressure: <0.005 bar

Permissible density measuring range:

0.2 … 19 kg/m³

 

Permissible pressure range:

Max.
measurement range:

1…10 bar (absolute)

Gas mixtures with argon (Ar) only up to

max. 9 bar (abs) must be used.

Burst pressure 30 bar

Test setup

Figure 1 shows the structure of the test station.
Five thermal mass flow controllers (MFC) connected in parallel allowed the various pure gases to flow through the sensor in alternation.
The installation of the exhaust at the side opening of the sensor favours the gas exchange in the housing, which optimises the reaction time.

 

  1. Gas supply
  2. MFC: Vögtlin red-y GSC-B9SA-BB23
  3. Static mixer: Swagelok
  4. Density sensor: TrueDyne DGF-I1
Design of gas mixer for wink of knowledge test
Figure 1 – Design of gas mixer

Results

In order to better assess the results of the measurements, the mean values of density, pressure, temperature, and reference density (at T = 0 °C, p = 1.01325 bar abs) were calculated.
For this purpose 100 measuring points per medium were used in the steady state.
Figure 2 shows the reaction time and stability of the measured values as well as the reference density output by DGF-I1 and the calculated reference density at 0 °C under atmospheric pressure of 1.01325 bar abs.

 

  1. Reference density Air – dry air
  2. Reference density N2 – nitrogen

A. Data extract table A

B. Data extract Table B

The maximum deviation of the DGF-I1 (density: <0.1 kg/m³) is clearly outside the scale of Figure 2
Table 1 - Mean values of the readings
Table 1 – Calculation of mean values and reference density
Wink of knowledge_air and N2_graphic
Figure 2 – Measurement results for air and N2
Figures 3 and 4 show the frequency distributions of the measured reference densities and help to visualise the repeatability of the gas density sensor.
The same readings were used as for the mean value calculations; the class width was defined as 0.001 kg/m³ for both media.
Figure 1 - Distribution of reference density - N2 nitrogen
Figure 3 – Distribution of reference density – Air dry air
Figure 2 - Distribution of reference density - Air dry air
Figure 4 – Distribution of reference density – N2 nitrogen
The fields A and B marked in Figure 2 show the origin of the raw data of tables A (second 5…15) and table B (second 160…170).
Wink of knowledge_air and N2_cutout Table A
Table A – Measurement results air and N2 – second 5..15
Wink of knowledge_air and N2_cutout Table B
Table B – Measurement results air and N2 – second 160..170

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From volume (l) to mass (kg)
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Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

read more

Article: Density and Concentration Measurement Applications for Novel MEMS-based Micro Densitometer for Gas

Article: Density and Concentration Measurement Applications for Novel MEMS-based Micro Densitometer for Gas

Density and Concentration Measurement Applications for Novel MEMS-based Micro Densitometer for Gas

C. Huber, TrueDyne Sensors AG, Reinach BL (Switzerland), Endress+Hauser Flowtec, Reinach BL (Switzerland)

Abstract

A MEMS cantilever based resonant device for gas monitoring actuated and sensed piezoelectrically, has been designed, simulated, fabricated and tested. Aluminum Nitride (AlN) has been used as active material to implement the piezoelectric actuator and sensor. Simulation performed using COMSOL and measurements show a very good agreement. The final system, the full sensor for gas monitoring, allows the measurement of gas density and viscosity at temperatures between 0 and 60 °C and pres-sures between 1 and 10 bar abs. with accuracies of <0.03 kg/m3 and 6% respectively. A second tech-nological run that aims to improve the viscosity accuracy is ongoing.

Event
18. GMA/ITG-Fachtagung Sensoren und Messsysteme 2016
2016-05-10 – 2016-05-11
Nürnberg, Germany
Band
SMSI 2020
Sensors and Instrumentation
Chapter
4.2 New aspects in gas detection
DOI
10.5162/sensoren2016/4.2.2
ISBN
978-3-9816876-0-6

Download article

(english version)

Link to AMA

(external Link)

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
©Article: AMA 10.5162/sensoren2016/4.2.2- 2016

Article: Design, Simulation, Fabrication and Characterization of piezoelectric MEMS Cantilever for Gas Density and Viscosity Sensors Applications

Article: Design, Simulation, Fabrication and Characterization of piezoelectric MEMS Cantilever for Gas Density and Viscosity Sensors Applications

Design, Simulation, Fabrication and Characterization of piezoelectric MEMS Cantilever for Gas Density and Viscosity Sensors Applications

A. Mehdaoui¹, C. Huber¹, J. Becker¹, F. Schraner¹, L. Villanueva²
¹TrueDyne Sensors AG, Reinach BL (Switzerland), ²Ecole Polytechnique Fédérale de Lausanne, Lausanne (Switzerland)

Abstract

This paper explores applications of recently released MEMS (Micro Electro Mechanical System) – based process densitometer for gas. The core of the sensor is a resonating silicon microtube which is flowed through by the process gas. Due to the very low density of silicon and the fact that the tube is resonating in a vacuum cavity very good density sensitivity is achieved even for low fluid densities. The sensor therefore perfectly suits gas density applications with a medium pressure between 5 and 20 bar. The microfluidic sensor has density and temperature measurement capabilities. Additionally pressure is monitored along the fluidic path. From these measured physical properties, real time quality information of the measured gas such as molar mass, reference density, specific gravity, gas composition and calorific value can be derived. Process applications are demonstrated with experimental and theoretical results.

Event
SMSI 2020
(did not take place because of Covid-19 virus pandemic)
Band
SMSI 2020
Sensors and Instrumentation
Chapter
A6 MEMS Sensors
DOI
10.5162/SMSI2020/A6.1
ISBN
978-3-9819376-2-6
Article MEMS-Cantilever - Page 1
Article MEMS-Cantilever - Page 2

Download article

(english version)

Link to AMA

(external Link)

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
©Article: AMA DOI 10.5162/SMSI2020/A6.1 – 2020

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

A Multiparameter Gas-Monitoring System Combining Functionalized and Non-Functionalized Microcantilevers

C. Huber¹, A. Mehdaoui¹, M. P. P. Pina² ³, J.J. Morales²,
¹TrueDyne Sensors AG, 4153 Reinach BL, Switzerland, ²Nanoscience Institute of Aragon (INA), University of Zaragoza, 50009 Zaragoza, Spain, ³Instituto de Ciencia de Materiales de Aragon (ICMA), Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain

Abstract

Ziel der Arbeit ist es, ein kompaktes, robustes und wartungsfreies Gaskonzentrations- und Feuchteüberwachungssystem für den industriellen Einsatz im Bereich der inerten Prozessgase zu entwickeln. Unser Prototyp eines Multiparameter-Gasüberwachungssystems ermöglicht die gleichzeitige Messung der thermophysikalischen Eigenschaften (Dichte, Viskosität) sowie des Wasserdampfgehalts (im ppm-Bereich) unter verschiedenen Prozessbedingungen. Dieser Ansatz wird durch die Kombination von funktionalisierten und nicht funktionalisierten Mikro-Cantilevern in einer einzigen Messplattform ermöglicht. Die Genauigkeit der Dichte- und Viskositätsmessung mit nicht funktionalisierten Mikro-Cantilevern wird für verschiedenen Gase über einen breiten Temperatur- und Druck- Bereich ausgewertet. Für die Feuchtemessung werden mikroporöses Y-Typ-Zeolith und mesoporöses Siliciumdioxid MCM48 als Sensormaterialien verwendet und charakterisiert. Eine leicht skalierbare Funktionalisierungsmethode für die Produktion mit hohem Durchsatz wird dabei angestrebt. Experimentelle Ergebnisse mit funktionalisierten Mikro-Cantilevern, die Wasserdampf (im ppm-Bereich) ausgesetzt sind, zeigen, dass Frequenzveränderungen nicht allein auf einen Masseneffekt zurückzuführen sind, sondern dass auch Steifigkeitseffekte in Abhängigkeit von der Wasser-Adsorption und der Temperatur berücksichtigt werden müssen. Um diese Hypothese zu stützen, wurde die mechanische Reaktion solcher Mikro-Cantilever modelliert, wobei sowohl die Effekte als auch die simulierten Ergebnisse durch Vergleich mit experimentellen Daten validiert wurden.

Download article

(english version)

Link to MDPI

(external Link)

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
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©Article: Special Issue MFHS 2019

Part 3 – MEMS technology

Part 3 – MEMS technology

MEMS technology

At a glance
In the previous section (part 2) we got to know the vibration measuring method. This section deals with the establishment of MEMS technology at TrueDyne Sensors AG. The technology has brought about the MEMS sensor, the heart of which is an oscillating silicon measuring channel. Compared to conventional resonator technology, it combines numerous advantages. These range from its small size and a wide range of applications to the exact determination of the density of gases, even at low pressure, and an extremely fast reaction time.

Part 2 – The resonator density measurement

Part 2 – The resonator density measurement

The resonator density measurement

At a glance
In the previous part (1) we learned about the basics of density measurement and the definition of density. This section is dedicated to the vibration method which is also used by density sensors for density measurement. This method also has some advantages and disadvantages, which are explained in detail.

Part 1 – Density measurement basics

Part 1 – Density measurement basics

Density measurement basics

At a glance
This section gives you a first insight into the basics of density measurement. You will learn that density is a temperature and pressure-dependent substance property which is often specified with the unit kg/m3 or lb/ft3. The density value is required for determining concentration, average molecular weight and content. For finding the density of gases, it must be noted that this density depends on the respective pressure. The density of liquids depends on the temperature.

Rethink the workplace – Steffen Zehnle

Rethink the workplace – Steffen Zehnle

A rock in the surf

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our R&D System Engineer Dr.-Ing. Steffen Zehnle.

Being active in production and keeping the projects on track

Present and future – home office and production. Steffen Zehnle moves skilfully in these different worlds during the current Covid-19 situation. Whether it’s the incoming inspection of our omega chips (see picture), the encapsulation of sensors or the advancement of current projects, Steffen is always present in a precise and structured way.

It is a pleasure to have such flexible and enthusiastic colleagues at TrueDyne.

« Character is not revealed by great deeds;
human nature is revealed by small things. »
Wilhelm Busch

Thank you for your commitment in this not so easy time. We appreciate your support and your flexibility.

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Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
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Picture credit Wilhelm Busch: Anonym, Wilhelm Busch 1878, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink the workplace – Joel Becker

Rethink the workplace – Joel Becker

The Marathon Man

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our Electronics Engineer EFZ Joel Becker.

Home sweet home

During the first Covid-19 cases, Joel Becker was on a service operation for us in Italy. When he returned to Switzerland he had to stay at home in quarantine for two weeks. After that we started with the extended home office. If anyone in our team is now a home office professional, it is definitely Joel Becker.

It’s nice to see that despite these circumstances he continues to successfully advance our project.

« The happiness of life does not consist in having little or no difficulties,
but to overcome them all victoriously and gloriously. »
Carl Hilty

Thank you for your commitment in this not so easy time. We (and the espresso machine) are looking forward to welcoming you (hopefully) back to the office soon.

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Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture credit Carl Hilty: Unknown author, Carl Hilty 1833 1909, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink the Workplace – Alexandre Mehdaoui

Rethink the Workplace – Alexandre Mehdaoui

Modelling and simulations

Rethink Sensing is not only our claim but part of our DNA. Today we introduce you to our R&D Project Manager MEMS colleague Alexandre Mehdaoui.

Swinging into the future

Alexandre Medahoui is responsible for the development of the next generation of MEMS chips at TrueDyne. Since he has been working for us, his workplace changes regularly. Whether it is from the office to the laboratory or into the clean room for the production of test MEMS chips. Since the Covid-19 situation, he bravely stays at home and uses the time to develop and simulate new models.

« But research strives and struggles, never tiresome,
according to the law, the reason, why and how. »
Johann Wolfgang von Goethe

Thank you Alexandre for making sure that our timetable of product innovations stays on schedule. By the way, if you want to know more about Alexandre’s work here is the link.

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From volume (l) to mass (kg)
Monitoring of welding gas mixtures
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Picture credit Johann Wolfgang von Goethe: Joseph Karl Stieler creator QS:P170,Q467658, Goethe (Stieler 1828), partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink the Education – Philipp Gurtner

Rethink the Education – Philipp Gurtner

Don’t put the saying on the back burner – work on the long table

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our Apprentice Electronics Engineer EFZ Philipp Gurtner.

An individual project work (IPA) that has it all

Philipp Gurtner joined TrueDyne for the 4th year of apprenticeship. In our small team the conditions for the intensive support of an IPA are optimal. This year, however, everything is different. Instead of briefly asking a colleague for advice over the desk, he has to find himself and his supervisors virtually new.

Due to the Covid 19 situation Philipp Gurtner now has to deal with new work in addition. This is a lesson that he can certainly use in his professional career.

« Man should learn, only the oxen cram. »
Erich Kästner

Thank you for your commitment in this not so easy time. We are looking forward to welcoming you (hopefully) soon back in the office.

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Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
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Picture credit Erich Kästner: Basch, […] / Opdracht Anefo, Erich Kästner 1961, cutt-of from TrueDyne Sensors AG, CC0 1.0

Rethink employee management- Josua Ritter

Rethink employee management- Josua Ritter

Leadership from a distance

Rethink Sensing is not just our claim but part of our DNA. Today we introduce our Managing Director Josua Ritter to you.

So close yet so far

A leader is only as good as his employees when he is not there. Our managing director Josua Ritter temporarily moved his “command center” home. A change that is not easy for him as a direct communicator. Whether it’s a personal word with employees, customers or suppliers.

Remarkable how calmly he has adapted to the circumstances and leads the team through the Covid-19 situation regardless of his location.

« Treat people as if they were what they should be, and help them become what they can be. »
Johann Wolfgang von Goethe

Would you also like to get in touch with Joshua Ritter? Use one of the following options:

Phone +41 61 715 62 12

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From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture Credit Johann Wolfgang von Goethe:  Joseph Karl Stieler creator QS:P170,Q467658, Goethe (Stieler 1828), partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink the Workplace – Sandro Schwab

Rethink the Workplace – Sandro Schwab

From new workplace to new workplace

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our R&D Engineer Software colleague Sandro Schwab.

His code becomes your solution

In January 2020 we welcomed Sandro Schwab to our team as a new software developer. After he has set up his workplace in our TechCenter in Reinach, he is now allowed to optimize his workplace at home due to the Covid-19 situation.

No matter where his workplace is, he is and remains an important support for the development of new sensors at TrueDyne.

« An investment in knowledge still yields the best interest. »
Benjamin Franklin

Thank you for your commitment in this not so easy time. We are looking forward to welcoming you (hopefully) soon back in the office.

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture Credit  Benjamin Franklin: AnonymousUnknown authorAfter Joseph Duplessis artist QS:P170,Q4233718,P1877,Q2286906, BenFranklinDuplessis, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink the development- Fabio Schraner

Rethink the development- Fabio Schraner

Accuracy and flexibility

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our R&D Engineer Hardware colleague Fabio Schraner.

Develop – Test, Test, Test – Release

Fabio Schraner is our hardware hero. Whether well-behaved in the home office or if necessary (see picture) in the laboratory. He knows how to organize himself. During the current Covid-19 situation he manages to advance our hardware development on site and in the home office and to support the product wherever possible.

« Logic will get you from A to B. Imagination wherever you want. »
Albert Einstein

Thanks Fabio for making sure that the development of our future products stays on schedule.

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Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture Credit Albert Einstein: Ferdinand Schmutzer creator QS:P170,Q370800, Einstein 1921 portrait2, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink the production – Ragnar von Möllendorff

Rethink the production – Ragnar von Möllendorff

In peace lies the strength

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our Technical Engineering and Operations colleague Ragnar von Möllendorff.

Adjustment of the calibration

Ragnar von Möllendorf is our man, if something needs to be tested in the short term, he is ready with material and action.

He is responsible for the calibration equipment, the heart of our sensor production. During the current Covid-19 situation he manages to keep our calibration systems running on site and via remote access.

« Quality is no coincidence, it is always the result of hard thinking. »
John Ruskin

Thank you, Ragnar, for making sure our production doesn’t come to a stop.

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture Credit John Ruskin: Unknown author, John Ruskin 1850s 2, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink your Workplace – Martin Ph. Hug

Rethink your Workplace – Martin Ph. Hug

Vision in sales

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our Sales Manager Martin Ph. Hug.

With vision in consulting

Anyone who knows Martin Ph. Hug knows that he seeks direct contact. He calls it “having a face” and means how important the personal level is in sales.

It is almost unimaginable that he has to spend his time in front of a computer monitor because of the Covid-19 situation. Thanks to the online Chat which can be activated via our website, you still have the possibility to be close by despite the distance.

« One must try the impossible to achieve the possible. »
Hermann Hesse

If he has not already reached you, you can contact him using the following options:

Phone +41 61 715 55 82

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture Credit Hermann Hesse: Gret Widmann (†1931), Hermann Hesse 1927 Photo Gret Widmann, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink new heroism – Nicole Talmon-Gros

Rethink new heroism – Nicole Talmon-Gros

Our heroine in production

Rethink Sensing is not only our claim but part of our DNA. Today we introduce our production heroine Nicole Talmon-Gros.

The world stands still – production runs

Nicole Talmon-Gros is the driving force in our sensor production. Be it in the coordination of the various employees, the production of sensors or in the planning of the next steps. With her structured approach and clear communication she helps the team to get through the current Covid-19 situation.

« Only bourgeois measure a personality on the profane scale of production. »
Oscar Wilde

Thank you Nicole Talmon-Gros for keeping the sensor production running for our customers and us.

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages
Picture Credit Oscar Wilde: Napoleon Sarony creator QS:P170,Q965637, Oscar Wilde Sarony, partial cut-out from TrueDyne Sensors AG, CC0 1.0

Rethink Laboratory – Christof Huber

Rethink Laboratory – Christof Huber

Home Office Laboratory

Rethink Sensing is not only our claim but part of our DNA. As a prime example, we would like to introduce our Chief Technologist Dr. phil. nat. Christof Huber.

Special situations require special solutions

Christof Huber is one of our leading research employees for whom the idea of a home office is hard to imagine. In addition to the highly complex formulas and the development of ideas, trial and error is very close to his heart.

Do not always follow the path that has been marked out, which only leads to where others have already gone.
Alexander Graham Bell

As you can see on the picture, he has turned his home office into a home lab. A big thank you to his family, who made it possible for Christof Huber to continue to develop new sensors in this Covid-19 situation.

Other articles that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages

5 Year TrueDyne

5 Year TrueDyne

5 years TrueDyne Sensors AG

After TrueDyne Sensors AG was already registered in the commercial register in September 2014, the journey officially began in February 2015 and we would like to thank all current and former employees who have helped make TrueDyne Sensors AG what it is today. “Rethink Sensing” is not only our claim but our DNA.

What makes TrueDyne Sensors AG special?

The continuous measurement of material properties of gas and liquids enables maximum process reliability. The quality as well as the composition of fluids are specified by our sensors on the basis of density and viscosity.

Based on smallest sensor technology and novel physical models, TrueDyne Sensors AG generates real added value for customers. “Rethink Sensing” The MEMS technology not only shifts the quality laboratory closer to the “Lab to Process” process, but also into the “Lab into the Process” process.

  • Density measurement of fuel, Oil and water-based liquids to determine mass or composition monitoring
  • Viscosity measurement of fuels/Oil to monitor the quality
  • Gas density measurement for quality control of gas mixtures (welding gas or MAP-gases) or clean gas quality monitoring.

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages

Isaac Newton *04.01.1643greg

Isaac Newton *04.01.1643greg

Today would have been Isaac Newton’s birthday. Our viscosity sensor VLO-M1 loves Newtonian fluids. Thank you for that.

Sensors that might interest you

Applications that might interest you

Monitoring of fuel concentrations

From volume (l) to mass (kg)

Monitoring of welding gas mixtures

Monitoring of gas mixtures for food packaging

Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

read more

Rudolf Clausius *02.01.1822

Rudolf Clausius *02.01.1822

Today would have been Rudolf Clausius’ birthday. Thanks today go out to Rudolf for formulating the second law of thermodynamics. It helps us even now with scientific progress and understanding.

Sensors that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packaging

Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

read more

James Precott Joule *23.12.1818

James Precott Joule *23.12.1818

Today would have been James Precott Joule’s birthday. His quote sounds a bit like one of our physicists. Thanks today go out to them for the outstanding improvements they’ve made to our sensors.

Sensors that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packaging

Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

read more

Company holidays 2019/20

Company holidays 2019/20

Company holidays 2019/20

The year is turning to an end and we will use the contemplative days.
From 21st December 2019 to the 6th January 2020, we have company holidays.

We will be back for you at January 6th 2020.

We wish you a Merry Christmas and a Happy New Year.
Your TrueDyne Sensors AG

Buy Nothing Day

Buy Nothing Day

Today is “Buy Nothing Day”. No problem; you can still place an order with us tomorrow. For all the rebels among you … we’re happy to take your orders today as well.
Quality management according to ISO 9001:2015

Quality management according to ISO 9001:2015

ISO 9001:2019 certification

Why do we get certified?

  • The DIN EN ISO 9001:2015 standard is an international standard that demonstrates high levels of quality to customers and third parties.
  • It serves as a catalogue of requirements for a quality management system.
  • The results are optimised internal company processes, minimised rejects, resource conservation, and increased customer and employee satisfaction.
  • An independent certification body confirms compliance with these standards.
  • The aim of the standard is to understand and implement the requirements that interested parties expect the company to meet.

The seven principles of quality management

The ISO 9000 standard explains the seven principles of quality management. They form the basis of quality management and are an important part of applying ISO 9001:2015 appropriately. They are:

  1. Customer focus
  2. Leadership
  3. Engagement of people
  4. Process approach
  5. Continuous improvement
  6. Evidence-based decision-making
  7. Relationship management

Based on this, we apply practices such as risk-based thinking, a process approach and the PDCA cycle throughout our entire quality management system.

The PDCA cycle

The PDCA cycle is a model for sustainably optimising the quality management system in companies. It is a four-step method:

  1. Plan – Determine improvement goals and define necessary measures
  2. Do – Implement measures from the planning phase, document results
  3. Check – Evaluate collected data to make an objective assessment of whether targets have been achieved
  4. Act – Reflect on process and integrate effective improvement measures

This cycle helps to solve problems efficiently and offers several other advantages, such as enabling companies to prevent recurring errors and continuously improve work processes.

Corporate policy of TrueDyne Sensors AG

TrueDyne Sensors AG supports the decision of Endress+Hauser Flowtec AG not to formulate a fully integrated management policy. In our opinion, this enables clearer, more targeted formulations and statements, facilitates understanding for employees and customers, allows for faster and more flexible changes and, from our point of view, offers no disadvantages whatsoever.

Quality = customer satisfaction

We want satisfied and loyal customers

This is why we define quality as customer satisfaction and focus on generating outstanding customer benefits. Through satisfaction, we want to achieve customer loyalty and lasting relationships. All of our planning and actions must be geared to this. Everything we do must also be viewed from the customer’s perspective and must always be based on this key question: “Is what we are doing or planning to do useful and beneficial for our customers, or are we merely concentrating on our company’s growth?” Customer orientation is an essential part of our corporate identity.

We strive for zero defects in products and services

This is an indispensable prerequisite for customer satisfaction and loyalty. Every mistake affects our customers, disrupts their normal processes, and can have serious and perhaps even unforeseeable consequences. Every mistake costs our customers time and money, causes problems, and ultimately dissatisfaction. Over time, dissatisfied customers become disloyal and prefer to obtain their services and products elsewhere. Every customer that we lose weakens our company and strengthens our competitors. It is extremely difficult to win them back. Zero defects can only be achieved if the entire product life cycle is designed and aligned accordingly – from market analysis and product definition to development, production, sales, and shipping. This means that every employee must contribute to the overall effort.

We strive for Operational Excellence

In our company, we apply the LEAN principles to strengthen our focus on operational excellence and thus optimize the quality and flexibility of our products as well as our business processes. As a result, we systematically identify and eliminate activities and processes that do not generate added value through continuous improvement. Our fundamental approach is based on the Kaizen Continuous Improvement Process and we do everything we can to transmit this LEAN culture  to our main suppliers.

We create products and services that we can be proud of

We develop, produce, and sell products and services that offer outstanding customer benefits and contribute significantly to improving customer loyalty thanks to their zero-defect quality. That is why we are proud of what we do. This also means that products and services are only provided or supplied to customers if we are convinced that they deliver the required and promised customer benefits, if they function perfectly, and are fault-free.

We want to promote a positive error culture that sees errors as an opportunity for improvement.
Everyone makes mistakes, but it is essential to correct them and learn from them. In our culture, no one is blamed or reprimanded for an error; but mistakes must not be repeated and, most importantly, must not be covered up! On the contrary, all of our employees are responsible for exposing and eliminating mistakes. Potential errors and possible sources of error are searched for, identified, and prevented using appropriate procedures and systems.

If an error leads to a customer complaint, our highest priority is to restore customer satisfaction. Like errors, complaints also provide an opportunity for improving our products and our understanding of customers. If, despite our best efforts, we are unable to restore our customer’s trust, we must use this lesson learned to discover and recognize the causes, and improve our future approaches.

We are reliable
We do what we say we are going to do. This applies both within our company and all the more so when dealing with our customers. All of our employees work closely together and we transfer unequivocal expertise at the right time. We provide accurate information in a responsible and timely manner. This is particularly important when working with our customers.
I am responsible for quality and continuous improvement.

I – and not just the others – am responsible for quality, continuous improvement, and customer satisfaction. As a company, we must constantly improve ourselves, our procedures, and our management system – and I play a key role in this process. What is good today may not be good enough tomorrow. In order to keep satisfied and loyal customers in the long term, we cannot rest on our laurels. That is why CIP, the continuous improvement process, plays a crucial role in our understanding of quality, determines our daily actions, and ensures our progress.

Certificate

SQS Certificate

German

SQS Certificate

English

SQS Certificate

Russian

IQNet Certificate

English

Inventors’ Day

Inventors’ Day

Today is “Inventors’ Day”. This day is also intended to commemorate lesser-known inventors. Who comes to mind for you on that front?
World Internet Day

World Internet Day

Today is “World Internet Day”. We’re pleased about that, otherwise you wouldn’t be able to read our post.
World Statistics Day

World Statistics Day

Today is “World Statistics Day”. Here are a few statistics on the topic: Celebrated for the first time on October 20, 2010. An initiative by the United Nations. More than 100 countries are involved.
MFHS 2019 – MULTIPARAMETR GAS MONITORING SYSTEM

MFHS 2019 – MULTIPARAMETR GAS MONITORING SYSTEM

Dr. phil. nat. Christof Huber, Chief Technologist, TrueDyne Sensors AG @ the 4th conference on microfluidic handling systems – MFHS Enschede – October 2019

MULTIPARAMETR GAS MONITORING SYSTEM COMBINING A FUNCTIONALIZED AND A NON-FUNCTIONALIZED Microcantilever

C. Huber¹, A. Mehdaoui¹, M. P. P. Pina², J.J. Morales²,
¹TrueDyne Sensors AG, Reinach BL, Switzerland, ²University of Zaragoza, Nanoscience Institute of Aragon, Zaragoza, Spain

ABSTRACT

We present a novel online gas monitoring system combining a pressure and a temperature sensor with two resonating microcantilevers from which one is functionalized with a highly sensitive hydrophilic material. By simultaneously observing eigen-frequencies and quality factors of the cantilevers gas density and viscosity can be determined as well as gas humidity in a sub-permille range. With this sensor information we can deduce molar concentrations of binary or even ternary gas mixtures in % together with the gas vapor ratio in a low ppm range.

Introduction

The aim of the presented sensor project is to develop a compact, robust and maintenance free gas monitoring system for industrial use in the field of inert gases e.g. welding or modified atmospheric packaging gas mixing application. In such applications typically binary or ternary mixtures of argon, helium, nitrogen, carbon dioxide, oxygen or hydrogen are used. Gas concentrations must be controlled with accuracies in the % range. In most cases, the humidity must also be monitored in these applications. Typical limit values are between 200 and 40 ppm [1]. The state of the art is the use of several different sensors in a sequence, e.g. thermal conductivity, together with specific optical absorption and dew point sensors. Such installations are bulky and require frequent recalibration. To bring the same functionality in one multiparameter sensor system we combine two resonating microcantilevers together with pressure and temperature sensors on one PCB board that is exposed to the process gas.

Commercially available silicon microcantilevers initially designated for atomic force microscopy are used (see Fig. 1). One cantilever is used to measure the density and the viscosity of the gas as reported by Badarlis et al. [2] or Huber et al. [3] and the other to measure water vapor in low concentration by adding a functionalized hydrophilic surface layer as reported for example by Urbiztondo et al [4].

Figure 1: Sensor PCB with the a first microcantilever in front of a permanent magnet. The second cantilever is placed on the backside of the PCB. Actuation occurs by sending a small AC current over the metal coil on the cantilever tip.
Download Paper
MFHS Enschede
(Link)
REFERENCES

[1] ISO 14175:2008, “Welding consumables — Gases and gas mixtures for fusion welding and allied processes”
[2] A. Badarlis, A. Pfau, A. Kalfas., “Measurement and Evaluation of the Gas Density and Viscosity of Pure Gases and Mixtures Using a Micro-Cantilever Beam”, Sensors, 15(9), pp. 24318-24342, 2015
[3] C. Huber, P. Reith, A. Badarlis, “Gas Density and Viscosity Measurement with a Micro-cantilever for Online Combustion Gas Monitoring”, 19.GMA/ITG-Fachtagung Sensoren und Messsysteme, Nürnberg Germany, 2018
[4] M. A. Urbiztondo, A. Peralta, I. Pellejero, J. Sesé, M.P. Pina, I. Dufour, J. Santamaría, “Detection of organic vapours with Si cantilevers coated with inorganic (zeolites) or organic (polymer) layers”, Sens. Actuators B, Chem., v. 171–172, pp. 822–831, 2012.

Boss Day

Boss Day

Today is “Boss Day” in the USA, Canada and Lithuania. We would also like to give our most grateful thanks to the work our bosses have given, and the fair and supportive way they’ve worked with us.
World Standards Day

World Standards Day

Today is “World Standards Day”. Did you know that this commemorative day goes back to October 14, 1946? One year later, the ISO (International Organization for Standardization) was founded.
World Smile Day

World Smile Day

Today is “World Smile Day”. This makes us smile.
International Coffee Day

International Coffee Day

Today is “International Coffee Day”. Did you know that in Switzerland we are one of the world’s leading coffee-drinking countries at around 1100 cups per person.Why not arrange a meeting with us to discuss the applications at your firm for our sensors over a nice cup of coffee?
Quality monitoring of fuels

Quality monitoring of fuels

Quality monitoring of fuels

The density of a liquid depends on its composition. If different liquids are mixed, the correct mixing ratio can be checked with density measurements. For example, in the case of heating oil: according to legal requirements, 7 % biodiesel may be added to heating oil. As this is tax-free, it is often operated at the limit of legality. With the density sensor DLO-M1 from TrueDyne, they monitor the quality of the fuel oil during the running process.
1. tank truck for the supply of fuel oil. 2 The sensor measures the density of the fuel oil directly at the transfer point. The data collected on site shows whether the correct media are being refueled in the correct ratio. 3 The product is handed over to the customer. Good quality is guaranteed.

Sensors for this application

Density sensor DLO-M1 for liquids

The DLO-M1 sensor measures the density of liquids in a microelectromechanical system (MEMS system). Within the MEMS system, the liquid is directed to an omega-shaped microchannel, the so-called omega chip. This tiny silicon tube – it is hardly thicker than a hair – is vibrated for the measurement. The density of the medium to be measured can be derived from the natural frequency of this oscillation.

More
Data sheet
Viscosity sensor VLO-M1 for liquids

Viscosity data can be used to determine the properties of liquids and monitor their quality. The sensor measures the viscosity in the running process – even in the smallest of spaces. Irrespective of the viscosity, the sensor also measures the density and temperature of the medium being measured.

More
Data sheet

Other applications you might be interested in

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packages

Michael Faraday *22.09.1791

Michael Faraday *22.09.1791

Today would have been Michael Faraday’s birthday. Maybe this was a flash of inspiration on his part?

Sensors that might interest you

Applications that might interest you

Monitoring of fuel concentrations
From volume (l) to mass (kg)
Monitoring of welding gas mixtures
Monitoring of gas mixtures for food packaging

Other articles that might interest you

Article: Multiparameter Gas-Monitoring System

Article: Multiparameter Gas-Monitoring System

The aim of the study is to develop a compact, robust and maintenance free gas concentration and humidity monitoring system for industrial use in the field of inert process gases. Our multiparameter gas-monitoring system prototype allows the simultaneous measurement of the fluid physical properties (density, viscosity) and water vapor content (at ppm level) under varying process conditions.

read more

Measurement of aqueous media

Measurement of aqueous media

Mark Twain is said to have said: “Writing is easy. You just have to leave out the wrong words.” In our case it is a complete sentence that we can omit from the VLO-M1 viscosity and density sensor data sheet.

Until that was the case, we needed a lot of developer sweat, brain and endurance.

Now the time has come, and we can delete the following sentence from the data sheet in the chapter “Permissible media”:

Do not use aqueous media. –

With the current VLO-M1 viscosity and density sensors and the DLO-M1 density sensor, you can now also measure aqueous media.

We are looking forward to many new applications. Do you already have an idea? Get in touch with us – info@truedyne.com

VLO-M1 viscosity sensor  DLO-M1 density sensor

Speak Like a Pirate Day

Speak Like a Pirate Day

Aaaarrrrr! Today is “Speak Like a Pirate Day”. We are quoting Elizabeth here (Pirates of the Caribbean): There will come a time when you have a chance to do the right thing. Such as arranging a date to meet with us for some no-obligation advice – info@truedyne.com