The sensors are used to detect residual liquids in potentially explosive atmospheres. Both the level sensor and the measuring transducer are integrated in a stainless steel housing. A prism is located at the lower end of the level sensor.

How it works

An electrical signal in the measuring transducer triggers a light pulse by means of an infrared LED. In the dry state (when the prism is not immersed in liquid), the light is reflected in the prism and directed back onto a photodiode. The photodiode converts the light pulse into an electrical signal that is output as a return signal.

However, if the prism is wetted by liquid, there is no reflection onto the photodiode. The light beam is deflected by the altered refractive index in the medium, and the return signal remains absent, which means that no release occurs.

Performance features

Overfill protection
Reliable and interference-free signal transmission
Robust construction
Protection class IP 67

Areas of application

Optical fill level detection
Monitoring and ensuring fuel consumption as well as theft detection
For the detection of liquid residues of mobile (tanker vehicles) and stationary containers
Preferably used in pipework
Monitoring and control of test processes

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