Top 5 Radar Level Transmitter Failures & Fixes – Save 50% on Downtime!

Even robust radar level transmitters can fail due to misuse. Here’s how to diagnose and resolve issues quickly.

Issue 1: No Signal/Weak Signal

Causes:

Dirty antenna (dust, condensation).

Low dielectric constant (ε<1.4).

Solutions:

Clean the antenna with isopropyl alcohol.

Switch to an 80GHz model for low-ε media.

Issue 2: Erratic Readings

Causes:

Obstructions (agitators, heating coils).

Foam/vapor interference.

Solutions:

Reposition the transmitter.

Enable “false echo suppression” or increase damping time.

Issue 3: Inaccurate Measurements

Causes:

Incorrect dielectric constant setting.

Misconfigured blind zone.

Solutions:

Re-enter the ε value (check MSDS).

Adjust blind zone via HART communicator.

Issue 4: “Echo Lost” Error

Causes:

Empty tank (level below blind zone).

Blocked antenna.

Solutions:

Verify minimum liquid level.

Remove obstructions (ice, deposits).

Issue 5: Communication Failure

Causes:

Corroded/wet cable connections.

Unstable power supply.

Solutions:

Seal connectors with waterproof tape.

Ensure stable 24VDC power input.

Pro Tips:

Clean antennas monthly; calibrate quarterly.

Choose IP68-rated devices for humid areas.