Chinese
Spanish
Russian
Portuguese
French
German
Indonesian
Thai
Vietnamese
Arabic
Italian
Turkish
Polish
Japanese
An ultrasonic water tank level sensor that loses readings during filling may have a different problem from one that drifts slowly while the tank is idle. Record the process state and available signal diagnostics before changing settings or buying a replacement. Stronger damping can conceal the timing of a fault without restoring a reliable measurement.
Ultrasonic water tank level sensor fault checks
| When it fails | Inspect | Useful comparison |
|---|---|---|
| During filling | Inlet jet, surface movement, foam and obstruction of the acoustic path. | Signal quality and reference level before, during and after transfer. |
| After cooling | Condensation and changing gas-space conditions. | Dry and affected states without altering several settings together. |
| Near full | Distance from the transducer face to the highest surface. | The selected sensor's near-range limitation and actual nozzle geometry. |
| At the PLC only | Scaling, wiring and invalid-reading treatment. | Local measurement versus transmitted signal and controller value. |
Use the installed ultrasonic manufacturer's instructions for compensation, diagnostics and cleaning. The gas space matters to an acoustic measurement; do not assume a temperature reading at one location describes every gradient or changing vapour mixture along the path.
Assess a radar alternative against the same tank
METRAVON MV-RD12 is a non-contact radar option for a documented liquid application. Radar removes the acoustic propagation dependency, but still needs an acceptable antenna position, nozzle and surface echo. Persistent foam, deposits and internal reflectors remain application questions rather than problems automatically solved by changing technology.
Compare the existing thread or flange with the selected radar assembly. Recalculate the reference distance from the new antenna plane. Use a replacement configuration record to separate retained settings from values requiring a new check. Then check supply and output: an old cable route may be reusable, but its terminal functions and receiving circuit cannot be assumed correct for the new device.
Run a controlled replacement comparison
Retain the old fault record and agree what improvement the new installation must demonstrate. Compare the same difficult operating states, not just a calm empty-tank reading. Verify the local value, output and PLC interpretation independently before returning the loop to control duty.
Q1. Does radar guarantee a reading through foam?
No. Foam properties and thickness can alter the observed echo. Describe the actual process and use a representative trial where detection is uncertain; avoid a universal foam-penetration promise.
Q2. Should the failed ultrasonic unit be discarded immediately?
Preserve its identity, settings and diagnostic evidence until the cause is established. A wiring or scaling problem may remain after replacement, while a process-specific signal issue needs a different selection decision.
Summary
Use the failure pattern to decide whether correction or a technology change is justified. Send the tank section and recorded symptoms for a radar replacement assessment; no direct mechanical or electrical interchangeability is assumed.
