material density measurement Switzerland

...Prosonic FDU91 ultrasonic sensor for continuous, non-contact measurement of liquid levels, pastes, sludges, and granular solid products. Also suitable for flow measurement in open channels and weirs. The measurement is not affected by dielectric constant, density, humidity, or material deposits thanks to the self-cleaning effect of the sensors. Suitable for areas with explosion hazards; maximum measurement range in liquids is 10 m (33 ft), in solids 5 m (16 ft).