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
Zero point drift

absolute zero point stable

Measurement principle

ultrasonic - runtime

Measurement frequency

120 / 200 kHz


IP 68


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)

Medium-contacting materials

Polyurethane, Stainless Steel 1.4571, PPO GF30, PA

Specifications subject to change.


IECEx Certificate of Conformity Sensor Family Mini and Transit Time Sensors

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

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

System Products

Haven't found the appropriate product?

Product Consultation

You want to have best information about our products? Our experts will gladly develop together with you the best system solution for your application.


You have questions about your NIVUS products in use? Our service hotline will readily support you.

We are glad to have you here! For any question regarding water or digitisation we are happy to answer you call or your email message.
Im Täle 2
75031 Eppingen