SeaDeal Technology | 30-year mainland China manufacturer of flow, pressure, temperature and level instruments

Problem Solution

How to Measure Level in High Foam Liquid Tank Accurately

Practical guide for selecting radar, guided wave radar or pressure-based measurement for tanks with foam.

Quick Answer

For high-foam tanks, guided wave radar can be effective when a probe is acceptable. 80 GHz radar may work when foam is light or intermittent; ultrasonic is usually less reliable.

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Recommendation

SeaDeal evaluates foam thickness, dielectric constant, tank geometry and whether probe contact is acceptable before recommending a level device.

Comparison table

Criteria Recommended option Alternative option
Heavy foam Guided wave radar may be preferred if probe installation is possible. Ultrasonic often struggles with foam.
Light foam 80 GHz radar can be evaluated. Mounting and echo settings still matter.
Contact risk Non-contact radar avoids probe buildup. Guided wave probe needs material and cleaning review.

Application scenarios

Foam weakens level signals, creates unstable echoes and can cause ultrasonic sensors or simple radar settings to fail.

Problem summary: Foam weakens level signals, creates unstable echoes and can cause ultrasonic sensors or simple radar settings to fail.

Related product categories

  • Level Measurement — Radar level meters, ultrasonic level meters, magnetic level gauges, float switches and hydrostatic transmitters for tank and silo monitoring.

Selection guide

  1. Describe foam thickness and frequency.
  2. Confirm medium dielectric and tank height.
  3. Check whether a probe can be installed and maintained.
  4. Send tank photo and nozzle information.

Data to send for a fast quote

  • Foam condition
  • Medium
  • Tank height
  • Nozzle
  • Probe feasibility
  • Temperature

Frequently asked questions

What level sensor works best with foam?

Guided wave radar is often evaluated for heavy foam when a probe can be installed; 80 GHz radar may work with lighter foam.

Does ultrasonic level measurement work with foam?

It is usually less reliable because foam can absorb or scatter sound waves.

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