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 principleultrasonic - runtime
Measurement frequency120 / 200 kHz
ProtectionIP 68
Ex-ApprovalII 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 pressuremax. 1 bar
Cable lengths7/15 m to connect to electronic box, not extendable
Level measurement range0 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 driftabsolute zero point stable
Medium-contacting materialsPolyurethane, Stainless Steel 1.4571, PPO GF30, PA

Specifications subject to change.

Technical Instructions Correlation Sensors

Instruction Manuals / Technical Information English

Technical instructions for correlation sensors and external electronic box

Installation Instruction for Correlation and Doppler Sensors

Instruction Manuals / Technical Information English

Installation instruction for save installation 

EU-Type Examination Certificate "Sensor Family Mini"

Certificates English German

IECEx Certificate of Conformity "Sensor Family Mini"

Certificates English German French

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

Certificates English

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

Certificates English
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