Ultrasonic Level Measurement

Continuous level measurement in liquids and solids with ultrasonic level sensors

Ultrasonic level measurement with Prosonic sensors provides continuous, non-contact and maintenance-free level measurement of fluids, pastes, sludges and powdery to coarse bulk materials. The measurement is unaffected by dielectric constant, density or humidity and also unaffected by build-up due to the self-cleaning effect of the sensors. Check out the broad range of Prosonic devices for ultrasonic level measurement and click on the button below.

Ultrasonic Measurement Time-of-Flight Prosonic FMU90

Ultrasonic Measurement Time-of-Flight Prosonic FMU90

This transmitter with housing for top-hat rail or field mounting. can be used up to 2 sensors.

Predecessor model: FHU43, DU43C, DU43S, FHU42, DU42S, DU42C, DU73S , DU73C, FHU73, Prosonic FMU861, Prosonic FMU860, Prosonic FMU862

Accuracy Measurement
+/- 2mm + 0.17% of measured distance
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Ultrasonic Measurement Time-of-Flight Prosonic FDU91

Ultrasonic Measurement Time-of-Flight Prosonic FDU91

The Ultrasonic sensor is used for level and flow measurement. It can be connected to FMU9x (It has measuring range up to 10m).

Predecessor model: Prosonic FDU81, Prosonic FDU81F, FMU801, Prosonic FDU80, Prosonic FDU80F,

Process temperature
-40 °C ... 80 °C
(-40 °F ... 176 °F)

Process pressure / max. overpressure limit
0.7 bar ... 4 bar abs
(10 psi ... 58 psi)

Max. measurement distance
Liquids: 10 m (33 ft),
Solids: 5 m (16 ft)

Accuracy
+/- 2 mm + 0.17% of measured distance

Main wetted parts
PVDF (fully welded IP68 / NEMA6P)
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Ultrasonic Measurement Time-of-Flight Prosonic FMU40

Ultrasonic Measurement Time-of-Flight Prosonic FMU40

Cost-effective device for standard level measurement in liquids and bulk solids for measuring range up to 5 m.

Predecessor model: FMU130E, FMU130A

Accuracy Measurement
+/- 2 mm or +/- 0.2 % of set measuring range 1)

Process Temperature
-40 °C...+80 °C
(-40 °F...+176 °F)
 
Pressure Measuring Range
0.7 bar...3 bar abs
(10 psi...44 psi)

Max. Measurement Distance
Liquids: 5 m (16 ft),
Solids: 2 m (6.6 ft)

Main wetted parts
PVDF

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Ultrasonic measurement: Measuring Principle

Prosonic is based on the Time-of-Flight principle. A sensor emits ultrasonic pulses, the surface of the media reflects the signal and the sensor detects it again. The Time-of-Flight of the reflected ultrasonic signal is directly proportional to the distance traveled. With the known tank geometry the level can be calculated.

Benefits

  • Non-contact, maintenance-free measurement
  • Measurement unaffected by media properties, like dc value or density
  • Calibration without filling or discharging
  • Self-cleaning effect due to vibrating sensor diaphragm