Ultrasonic Level Transmitter LST400

Ultrasonic level transmitter with HART



Ultrasonic Level Transmitters for Water and Wastewater Treatment Applications

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The transmitter’s microprocessor simultaneously fires an electronic pulse to the transducer and starts a timer. The transducer converts this electronic pulse to an acoustic pulse, which is directed toward the surface of the material being measured. When the acoustic pulse contacts the surface of the material, energy is reflected back to the transducer, which converts this reflected energy back to an electronic pulse. This pulse is sent back to the microprocessor, which stops the timer and determines the “time of flight” of the signal. By combining the speed of sound through air and the “time of flight” of the pulse, the microprocessor accurately determines the level of the product. Powerful software removes false echoes from the signal and electronic filters remove ambient noise.



Range to 50 ft. / 15 m
Isolated 4 – 20 mA Output with HART 7
Graphic LCD Display
Integrated Analytical Software
5 Configurable Relays / 8 Amp
Configurable as Open Channel Flow Meter
Pump Cycling and Pump Monitoring
Remote Totalizer Count Outputs
Automatic Variable Gain & Power for Difficult Applications


Various Liquids Including Water Storage Tanks
Moderate Range Solids Such as Loading & Bagging Hoppers
Mineral Oil
Open Channel Flow Measurement in the following configurations


Transducers for Liquids & Solids
Cable length of 10m, 20m, 30m 40m or 50m
Aiming Kit


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