Avoiding the formation of condensation droplets on ultrasonic sensors

In the case of vertically mounted ultrasonic sensors for level measurement in liquid tanks, condensation droplets can form on the coupling layer of the transducer under certain climatic conditions - particularly in the case of high humidity or temperature differences. These droplets can interfere with the sound propagation and lead to incorrect measurement results or even failure of the sensor function.

By mounting the ultrasonic sensors horizontally in combination with an acoustic 90° deflection angle, the sensor is positioned in such a way that no condensation droplets can collect directly on the coupling layer. The sound signal is deflected downwards by 90° (in the direction of the medium) via an angled reflector element.
As the active sensor element - the ultrasonic transducer - is now aligned vertically, the drainage of condensation is facilitated by gravity - the droplets do not remain on the surface.

Deflector reflector for M18 and M30 housings