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Overfill Prevention
Level Measurement
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Overfill Prevention Device

Overfill Prevention Device &
Thermal Level Sensor

NB220 - Easy to use and reliable

The ideal solution for overfill prevention of your tanks for water polluting liquids. With its easy installation and the option of connecting acoustic or optic signals directly to the transducer, the overfill prevention has proven its reliability for years. The overfill prevention device for non-flammable and combustible liquids of hazard class AIII consist of a thermal level sensor from our 76 series and a transducer from our NB220 series. The 76 can also be used as level control to regulate the Liquid level of tanks and process vessels. It provides a standalone solution and operates independently of any superordinate industrial controller or PLC-system.
Field of application | 76 A with NB 220 Thermal Overfill Prevention

Easy to get started

Easy installation with a 2-wire terminal to the transducer, fitted independent of polarity. The sensor requires no maintenance after the installation, therefore there are also hidden costs!

Installed and tested in the following applications:

Full notifications in fuel oil tanks, day oil tanks, tall tanks, oil containers, sumps
or bottles.


Various fields of applications: Applications examples Info


There is no abrasion since there are no moving parts. A long life time is guaranteed with consistent reliability.

Highly dependable:

The overfill prevention device fulfils the requirements of the German Water Resources Act (WHG).

Information Sheet

76 A with NB 220

76 A mit NB 220 in brief

InfoReliability proven over 45 years
InfoApproved as overfill prevention device
InfoNo moving parts
InfoEasy installation
InfoPermanent self-testing
of the sensors
InfoOur best solution for containers containing water polluting liquid.
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