Sensors for density and viscosity of liquids and gases

With TrueDyne sensors you can measure the density and viscosity of liquids and the density of gases – reliably, accurately and directly in the process. The sensors offer particular advantages in cases where high-precision measurements are required in the smallest of spaces and with minimal quantities of the medium to be measured. The sensors can be integrated into production and record the measured values without you having to interrupt your production process. There is no need to go to the laboratory and you get the qualitative and quantitative data where you need it: Directly in the process. Benefit from ready-to-install OEM measurement modules or work with us to develop a tailor-made configuration for your company. The possible applications cover a broad spectrum: For example, you can record density data in addition to carrying out volumetric measurements with a flowmeter in a tank system in order to calculate the mass of the liquid being added to the tank. Or use density data to ensure that meat or salad is packaged under the right gas mixture and stays fresh for a long time.

Sensors for determining density

MEMS sensors for determining the density of liquids and gases

DLO-M1 density sensor for liquids

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The sensor measures the density of liquids during the process itself – no need to go to the laboratory. Thanks to a sub-millimeter measuring channel, the properties and quality of a liquid can be precisely monitored even in confined spaces. Application examples:

  • Determination of the mass of liquids: If the density is measured in addition to volumetric flow measurement in orifices, turbines or displacement devices, the mass can be calculated from it.
  • Monitoring and control of the quality of fuel mixtures such as E10 or biodiesel.

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DLO-M2_ex density sensor for liquids

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ATEX LogoThe DLO-M2_ex sensor for use in hazardous areas according to ATEX: II1G and IECEx: Zone 0 measures the density of liquids in a microelectromechanical system (MEMS system). Thanks to the measurement in the MEMS system, the sensor is only 30 x 83 x 15 mm³ small and can be installed even in tight spaces. The high-precision measurement results are immediately available, allowing continuous measurement during the running process.

Application examples::

  • As a supplement to volumetric measurement during aircraft refuelling.
  • Monitoring of the delivered and received density of the fuel in tank trucks.

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DGF-I1 density sensor for gases

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TrueDyne_German_Innovation_Award_Winner_19Monitor gases and gas mixtures during the process in the smallest of spaces and with minimal quantities of the medium. The sensor not only measures density, but also temperature and pressure – for precise monitoring of product quality and as a basis for determining the concentration of binary gas mixtures. Application examples:

  • Monitoring of welding gas mixtures: To ensure a reliable weld seam, the gases must be mixed in the correct ratio. Gas density data can be used to monitor the gas mixture.
  • Monitoring of gas mixtures for food packaging: Density data can be used to monitor the gas mixture for salad or meat packages. This replaces spot checks and reduces losses.
  • Testing of clean gases: Gas cylinders can get mixed up. Density data shows whether the correct gas cylinder is in use.

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Nanomass density sensor for gases

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Cooperation between Endress+Hauser Flowtec AG and TrueDyne Sensors AG The instrument for continuous gas density measurement directly in the process – Nanomass gas density sensor is the first instrument for precise measurement of gas density based on the revolutionary MEMS Coriolis technology. This is where Endress+Hauser Flowtec AG’s long-standing Coriolis know-how meets TrueDyne Sensors AG’s innovative microtechnology. For the first time, it is possible to continuously monitor parameters such as gas density or gas quality directly in the running process under economically attractive conditions. Nanomass gas density sensors can be easily integrated into any existing process infrastructure.

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Sensors for determining viscosity
MEMS sensors for determining the viscosity of liquids

VLO-M1 viscosity sensor for liquids

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

  • Optimization of process reliability in applications where a certain viscosity is required. For example, engine oils on calibration systems.
  • To supplement the density values to ensure the quality of lubricants or fuels.

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VLO-M2_ex viscosity and density sensor for liquids

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The VLO-M2_ex sensor for use in hazardous areas according to ATEX: II1G and IECEx: Zone 0 measures the density and viscosity 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 set into oscillation for the measurement. The density of the medium can be derived from the natural frequency of this oscillation: the denser the medium, the lower the oscillation.

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