The FDU93 ultrasonic sensor is suitable for continuous, non-contact level measurement of liquids, pastes, sludge, powders and coarse bulk solids, is maintenance-free, and can also be used for flow measurement in open channels and weirs. The measured values are unaffected by dielectric constant, density or humidity, and the self-cleaning function of the sensor eliminates the influence of medium adhesion on the measurement. Suitable for hazardous areas; maximum measuring range: liquids 25 m (85 ft), solids 15 m (50 ft).

Benefits
Integrated temperature sensor for time-of-flight correction. Precise measurement even when the temperature changes
Suitable for use in harsh climatic conditions; sensor and transmitter can be installed separately up to 300 m apart
Sensor self-cleaning function reduces adhesion formation
Integrated automatic sensor detection for convenient commissioning with the FMU90 / FMU95 level transmitter
Degree of protection IP68
Non-contact measurement minimizes service requirements
Dust-Ex and gas-Ex approval (ATEX, FM, CSA)

Applications
Suitable for continuous, non-contact level measurement of liquids, pastes, sludge, powders and coarse bulk solids; flow measurement in open channels and weirs. Maximum measuring range: liquids 25 m, solids 15 m; suitable for hazardous areas; other measuring ranges: FDU91/91F: liquids 10 m, solids 5 m; FDU92: liquids 20 m, solids 10 m; FDU95: solids 45 m; FDU96: solids 70 m

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Source: Endress+Hauserpublic information from the website