Level Transmitters for Solids & Liquids

Radar or guided wave radar, because the microwave pulse isn't affected by dust the way an ultrasonic pulse is. The Trumen radar transmitter works from vacuum to 160 bar and -40 to +400 °C, unaffected by vapour and dust, so it stays accurate in cement, grain and powder silos where ultrasonic can lose its echo.

Free-space radar sends a microwave pulse through open air above the material and reads the reflection. Guided wave radar sends the same pulse down a probe in contact with the material, which works better in tighter vessels, around obstacles, and on low-dielectric liquids or interfaces. Trumen's guided wave radar reaches 30 m with ±3 mm accuracy.

Yes. The Trumen TLUC ultrasonic transmitter can monitor open-channel flow over weirs and flumes as well as tank level, with 4 to 20 mA, RS485 Modbus and relay outputs. That makes it useful for combined level and flow monitoring in water treatment plants.

The Trumen TLC2 two-wire capacitance transmitter, with a PTFE or ceramic-insulated probe rated to 300 °C and 20 bar. Capacitance sensing works well on sticky, non-conductive liquids that could foul an ultrasonic or radar sensor's reference point.

The Trumen guided wave radar transmitter measures up to 30 m range with ±3 mm accuracy, and covers -40 to +250 °C. That's tight enough for most inventory and custody-quality level readings in tanks and silos.

Yes, the Seli SFP is a TDR fill-level sensor with an elastomer-free G1" hygienic weld-in connection, rated -1 to 16 bar, with 4 to 20 mA or 0 to 10 V and switching outputs. For a fully flush-mounted hygienic option, see our milk silo level transmitters.