Viscosity sensor VLO-M1 for liquids
The measuring system, which is sub-millimeter in size, enables the sensor to be compactly built. It is only 80 x 30 x 15 mm³ in size and can therefore be accommodated even in tight spaces. The measured values are transmitted to the higher-level system via an RS232 interface and the ASCII command protocol in the TrueDyne Sensors standard.
Monitoring of fuel concentrations
New cars must be put through their paces before they are registered. The engine is tested at its limits and often started “cold”. As a result, the fuel no longer burns completely and it mixes with the engine oil. Too much fuel in the engine oil can destroy the engine. With the viscosity sensor, tests no longer have to be interrupted – you can monitor the viscosity of the oil directly in the process and replace it if necessary.
Viscosity, Density and several metries derived from them (e.g. standard density, concentration, etc.)
Particel free (<30 μm) hydrocarbons like for eg.
- petrol E5 / E10 / E85
- diesel B7 / B10 / XTL
- Jet-A1 (also F-35 or JP-8)
- M100 (methanol)
- OME* (synthetic fuel)
Aqueous media like for eg.
- Glycole mixtures*
If necessary, media that deviate from the listed may be used, after individual clarification. *Optional
Viscosity: ±[0.2 mPa s + 5% of measured value]
Density: ±[0.2 or 0.01 x abs (T-25 °C)] kg/m³ if the value is >0.2
Temperature: ±0.15 or. ±[0.0075 x abs(T-25 °C)] °C if the value is >0.15
Viscosity: ±0.1 mPa s
Density: ±0.1 kg/m³
Temperature: ±0.05 °C
Permitted ambient temperature:
Permitted storage temperature:
Range of application
0,3…50 mPa s
Permitted density measurement range:
600…1000 kg/m³ (Option 0…1200 kg/m³)
Permitted process pressure range:
0…20 bar (absolute)
Bursting pressure 80 bar (absolute)
Permitted particle size:
Max. 30 μm
Permitted flow range:
0…10 l/h (water)
Due to the high operating frequency of the micro channel, vibrations (<20 kHz) do not affect the measuring accuracy.
Inlet and outlet runs:
Inlet and outlet runs do not affect the measuring accuracy.
EMV 2014/30/EU (EN 61326-1)
Schwingungs – und Stossfestigkeit:
- 1.4404 (316L)
- 1.4542 (AISI/SUS 630)
Medium wetted material:
- 1.4542 (AISI/SUS 630)
BOROFLOAT® 33 glass
Dimensions / design
30 mm x 66 mm x 15 mm (without cable and cable bushing)
Dimensions measuring channel:
160 x 200 μm (500 nl)
IPx4, IPx5, IPx6, IPx7 (IEC 60529)
2 x M5 threaded holes with an angle of 45° to the side and the front surface
Fixed installed cable
Outer diameter of cable:
Diameter of cores:
4 x AWG 28
Lead of gage:
Digital communication line and power supply in a common shielded cable
Continuous, without the need for a command from the outside
Hardware Standard RS232 Proprietary ASCII output string
Power connection DC 5 to 12 V (max. 400 mW) via power unit with safety extra low voltage (SELV) or protective extra low voltage (PELV)
The maximum permissible fault voltage between GND (signal ground) and earth must not exceed 36 Vpeek.
(Option acyclique with 100 ms response time)
white: VDD (supply voltage)
brown: GND (signal ground)
green: RX (input)
yellow: TX (output)
Note: The cable assignment corresponds to the view of the sensor (VLO-M1)
Certificates and approvals
The density sensor meets the legal requirements of the EC Directives. TrueDyne Sensors AG confirms that the density sensor has been successfully tested by applying the CE mark.
All installed components meet the requirements of the RoHS directive.
EMC 2014/30 / EU (EN 61326-1)
Product Design: VLO-M1
- Electronic interface for communication and power supply
- Drill holes for mechanical mounting (6 x M3 threaded holes)
- Fluidic interface (2 x M5 threaded holes)
Mechanical mounting: VLO-M1