Endress+Hauser Clamp-On Verification
When you need to verify a flow meter's accuracy without taking it out of service — and without cutting into the process — Clamp-On Verification gives you the answer. TriNova's factory-certified technicians temporarily install clamp-on ultrasonic measurement equipment on the exterior of your process piping and compare measured flow values against your installed flow meter's readings.
How TriNova performs Clamp-On Verification
Our certified technicians temporarily mount clamp-on ultrasonic measurement equipment on the exterior of your process piping — no pipe cuts, no process isolation, no operational disruption. The clamp-on data is compared in real time against the installed flow meter's readings to determine performance accuracy across actual operating conditions.
The result is independent, non-intrusive verification of the flow meter you depend on — with documented results and clear next-step recommendations, all delivered while the process keeps running.
- Clamp-on ultrasonic measurement equipment installed temporarily on pipe exterior
- Non-intrusive setup — no pipe cuts, no process isolation, no operational interruption
- Real-time comparison between clamp-on data and installed flow meter readings
- Performance accuracy determination across actual operating conditions
- Documentation of verification results and any measurement discrepancies
- Recommendations for next steps — recalibration, repair, replacement, or no action
The Outcome
What Clamp-On Verification delivers
No process interruption
The flow meter you're verifying stays in service. The process keeps running. No isolation, no bypass, no production downtime — the verification work happens around your operation, not through it.
Independent verification of your installed flow meter
Clamp-on equipment acts as a reference measurement against your installed flow meter — a third-party check that quantifies whether the installed device is reading accurately, drifting, or off-spec.
Performance accuracy quantified
You get actual measured data showing how the installed flow meter performs versus the clamp-on reference — not an estimate, not a "feels off." The discrepancy is documented in units your operations team uses.
Documented results for your reliability program
Verification records feed directly into your reliability and maintenance programs — supporting decisions on recalibration, repair, replacement, or continued operation with confidence.
When to schedule clamp-on verification
Common reasons facilities request Clamp-On Verification
- Suspected drift, accuracy concerns, or lab-to-meter discrepancy on an installed flow meter
- Custody transfer applications requiring periodic independent flow verification
- Pre-turnaround verification of critical flow loops to scope or defer maintenance work
- Reliability program needs quantitative verification of installed flow meters between calibrations
- Process change, fluid change, or operating condition shift that may have affected flow meter performance
Clamp-On Verification FAQs
What pipe materials and sizes are compatible with clamp-on verification? Clamp-on ultrasonic measurement works on most metallic pipe (carbon steel, stainless steel) and many non-metallic materials, across a wide range of pipe sizes. We confirm compatibility with your specific pipe material, wall thickness, and diameter when the verification is scoped — and tell you up front if the pipe characteristics rule out clamp-on for that application.
How accurate is clamp-on verification compared to the installed meter? Clamp-on ultrasonic measurement carries a documented accuracy range depending on pipe conditions, fluid properties, and flow characteristics. The verification establishes a reference reading against which the installed meter is compared — the discrepancy and the clamp-on's measurement uncertainty are both included in the documented result so the comparison is interpreted correctly.
Do you need any process access or just exterior pipe access? Exterior pipe access only. No process taps, no isolation, no fluid contact. The clamp-on transducers attach to the outside of the pipe, send ultrasonic signals through the pipe wall, and read the return signal — all without touching the process fluid.