Ensuring reliable level measurement in tanks with internal obstructions
What happened
Non‑contacting radar level transmitters remain a preferred solution for many tanks but perform poorly when internal obstructions create multiple false echoes. The article explains that antenna positioning and echo discrimination matter; when echoes are ambiguous, interventions such as repositioning, added sensors or bespoke antennae are necessary and can be disruptive and costly. Watch whether buyers start requiring installation evidence and acceptance testing from vendors
Buyer takeaway
Treat obstructed‑tank radar installs as a scoped engineering deliverable rather than an off‑the‑shelf device buy: require proof of placement and acceptance tests
Cost / money
Accepting generic radar specs risks repeat site visits and cleanup or downtime costs; plan for mobilisation and potential retrofit spend
Supplier / commercial
Vendors may quote base devices cheaply but exclude installation engineering and repeat calibrations — insist these items are priced and contracted up front
Safety / operations
Misreads can cause overfill, spills or pump damage; specifying FAT/SAT and installation responsibilities reduces safety and uptime risk
What to watch
Limited relevance for perfectly unobstructed tanks but high relevance where internal structures are present; watch for warranty carve‑outs on obstructed vessels
Key facts
- FMCW non‑contacting radar highlighted as preferred technology
- Obstructions cause multiple echoes requiring antenna and echo‑filter strategies
- Mitigations (repositioning or additional sensors) are operationally disruptive
Source excerpts
This makes effective discrimination between true and false echoes a critical requirement for reliable non-contacting radar level measurement. Figure 2: Internal equipment can make it challenging for a non-contacting radar level transmitter to differentiate the true surface echo from false echoes coming from obstructions
Figure 2: Internal equipment can make it challenging for a non-contacting radar level transmitter to differentiate the true surface echo from false echoes coming from obstructions. Strategies for mitigating false echoes While tanks containing internal structures present clear challenges for non-contacting radar level transmitters, a number of strategies can help to reduce or eliminate the impact of false echoes
When combined, these factors can make accurate and reliable level measurement in obstructed tanks one of the most difficult applications for non-contacting radar technology
