Ensuring reliable level measurement in tanks with internal obstructions
What happened
Process Online explains that internal tank structures create false echoes for non-contacting radar level transmitters, making accurate level measurement difficult in some tanks. The article highlights FMCW radar and positioning strategies as mitigations and notes that interventions (repositioning, added measures) often require scoped installation work and downtime. Watch whether sites start to reclassify obstructed tanks for retrofit or managed-installation tenders
Buyer takeaway
This is an operationally real demand: obstructed tanks often need installation scope and specialist labour, so plan for project-level procurement rather than ad-hoc spare orders
Cost / money
Directional increase in one-off installation and mobilization costs when anti-echo measures or repositioning are needed
Supplier / commercial
Suppliers may quote short-validity install windows and charge for on-site surveys; lock-in lead-time commitments and mobilization terms in SOWs
Safety / operations
Inaccurate readings can lead to overfills or dry pumps; addressing echoes is a direct safety and environmental control action
What to watch
Vendors will market FMCW as low-maintenance; verify on-site echo behaviour before accepting lifecycle claims
Key facts
- Non-contacting FMCW radar preferred for difficult applications
- Internal structures (agitators, coils, baffles) create false echoes
- Mitigation options often require repositioning or scoped installation
Source excerpts
As a result, even minor interference from internal structures can cause the transmitter to misidentify a false echo as the correct one
Underfilled tanks reduce storage efficiency, disrupt production schedules, and can result in downstream process interruptions, product shortages or even dry running of pumps, which may cause equipment damage and unplanned downtime. Across industries that depend on just-in-time operations, such inefficiencies can translate directly into lost revenue and reduced competitiveness
False echo suppression For many years, top-down level measurement technologies have used a common mapping technique to analyse received signals and suppress false echoes, ensuring that the device reliably detects the true material level. During initial commissioning, a reference map of the tank is created by capturing echoes when the tank is empty or at a known level
