Description
Fluke 721Ex Pressure Calibrator Repair
The Fluke 721Ex is a pressure calibrator – it reads pressure and, on most models, the mA loop alongside it, so a transmitter can be verified end to end.
Is your Fluke 721Ex worth repairing?
Moderate replacement cost, but the dominant fault is worn pump seals – a low-cost repair on an otherwise sound instrument. Replacing a calibrator because its pump seals have gone is the most avoidable spend in this category. Our answer for the Fluke 721Ex: Repair. Seal replacement costs a fraction of a new calibrator. We evaluate free of charge and quote before any work begins, and if the numbers do not favour repair we say so rather than quoting anyway.
What typically fails on the Fluke 721Ex
- mA loop or 24V supply faults.
- Electric pump motor faults on the powered models.
- Display and battery faults.
- Pump seals and O-rings – by far the most common, and inexpensive to put right.
- Leaks in the manifold or fittings.
- Sensor drift.
What you get back
Component-level repair rather than assembly swapping, verification against reference standards with the measured results documented, and a 90-day parts-and-labor warranty. Most instruments are back with you inside 5-10 business days.
Fluke Service Center works on Fluke instruments only. Send it in for a free evaluation, or email us with the model and the symptom and we will tell you what to expect before you ship anything.





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