Level Sensors

DSM Level Sensor

Part No. DSM

for level measurement with small distances

Air-ultrasonic sensor for connection to flow transmitters NivuFlow Mobile 750 for non-contact level measurement in part filled flow measurement places.

  • Direct sensor connection to flow transmitters such as NivuFlow Mobile 750
  • Small construction height
  • Minimal dead zone
  • Digital echo processing and linearisationNarrow beam angle
  • Optimised construction for small pipes
  • Easy installation using pipe mounting system or direct fasting using bolts
  • View echo profiles on the transmitter
  • Integrated temperature compensation
  • ATEX approval for Ex-Zone 1


The compact air-ultrasonic sensor Type OCL has been developed for direct connection tor NivuFlow Mobile 750. Thanks to the slim construction it is ideally suitable for use in the crown of small and large pipes, on channel ceilings or other constructions.
The low dead zone allows to measure variable levels in flow applications almost up to full filling. The integrated temperature measurement ensures very high accuracies over the entire very wide measurement range.
The ATEX approval in Ex Zone 1 is a standard feature

Technical Data

Level Sensor, Type DSM
Measurement principle ultrasonic - runtime
Measurement frequency 120 / 200 kHz
Protection IP 68
Ex-Approval II 2 G Ex ib IIB T4 Gb
Operating temperature -20 °C up to +80 °C
-40 °C up to +80 °C when used in Ex Zone 1
Storage temperature -30°C to +70 °C
Operating pressure max. 1 bar
Cable lengths 7/15 m to connect to electronic box, not extendable
Level measurement range 0 to 200 cm
Dead zone (starting at mounting plate) 4 cm
Measurement uncertainty < +/- 0,5% of measurement area bzw. +/- 5 mm of value (larger value counts)
Zero point drift absolute zero point stable
Medium-contacting materials Polyurethane, Stainless Steel 1.4571, PPO GF30, PA

Specifications subject to change.

Technical Instructions Correlation Sensors

Technical instructions for correlation sensors and external electronic box

Installation Instruction for Correlation and Doppler Sensors

Installation instruction for save installation 

EU-Type Examination Certificate Sensor Family Mini and Transit Time Sensors

IECEx Certificate of Conformity Sensor Family Mini and Transit Time Sensors

EU Declaration of Conformity " Ultrasonic sensors CSM / SP / DSM / OCL-LM

EU Declaration of Conformity "Ex" ultrasonic sensors CSM / CSP / DSM / OCL-LM


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