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A radar vs ultrasonic level sensor trial is useful only when both readings describe the same physical quantity at a comparable time. Installing two instruments and selecting the steadier display can reward heavy filtering or a constant wrong echo. Define the reference, operating states and acceptance limits before collecting results.
Reconcile the two mounting references
Survey the reference plane of each instrument against the same vessel datum. Sensors on different nozzles can report different raw distances while calculating the same level correctly. Retain both the raw measurement and the configured level instead of comparing percentages with unknown endpoints.
METRAVON MV-RD12 is an 80 GHz liquid radar option for such an assessment. Review its nozzle and process connection independently of the ultrasonic installation. A temporary bracket or adapter must be suitable for the actual environment and must not introduce an unapproved pressure boundary.
Radar vs ultrasonic level sensor trial conditions
| Trial stage | Record together | What to establish |
|---|---|---|
| Stable level | Independent reference and both instrument values. | Bias after reconciling datum and units. |
| Level change | Time-aligned trends and filter settings. | Response delay rather than only apparent smoothness. |
| Process change | Heating, filling, foam or other relevant conditions. | Whether the proposed method remains usable during the reported problem. |
| Recovery | Return to a stable state and available status indications. | Whether a lost or unsuitable measurement recovers without hiding a persistent error. |
Use a reference method appropriate to the vessel and required tolerance, with its own limitations documented. The existing instrument is not automatically the reference. Agreement between two devices is useful evidence, but shared scaling or installation errors can make both agree incorrectly.
Separate response speed from measurement scatter
Compare averaging intervals and timestamps. A heavily damped signal can look quieter while reaching the true value later. If the controller needs a prompt stop action, assess the permitted delay as well as the steady-state error. Do not average away the operating event that the project needs to detect.
Keep the original settings and retain unsuccessful observations. Change one assessed item at a time and identify the revision used for each result. The measurement-principle comparison explains why the two technologies can respond differently to the process.
Q1. Can the trial be accepted without an independent reference?
It can demonstrate differences and operating behaviour, but agreement alone cannot establish absolute accuracy. State that limitation and arrange the additional reference work needed for the acceptance claim.
Q2. Should the existing control loop remain active during the trial?
Use the site's approved test arrangement. Monitoring a candidate separately can avoid an unplanned control change, but the final integration still needs verification. Do not disconnect or substitute protective inputs informally.
Summary
Provide the proposed comparison method for an MV-RD12 trial review. Choose from the recorded performance under required conditions, not from which display looks calmer during one convenient test.
