Description
Fluke 721-3615 Pressure Calibrator Repair
The Fluke 721-3615 is a dual-sensor pressure calibrator: two isolated pressure sensors in one instrument, so static and differential pressure can be read simultaneously. It was built for gas custody transfer and flow-computer work, where a small error becomes a measurement dispute rather than an inconvenience. Two sensors means two independent things that can drift.
June Company’s certified technicians repair the Fluke 721-3615 for gas measurement technicians, custody transfer teams, and pipeline instrument crews. Every instrument is repaired at component level and verified against reference standards before it ships back, with the measured results documented.
Common Fluke 721-3615 problems we fix
- One sensor drifted, the other reading correctly – the classic 721 symptom – and the reason a single-point check misses it.
- Both sensors out of tolerance – corrected and verified independently against reference standards.
- Static and differential readings disagreeing – the relationship between the two channels, which is the whole point of this instrument.
- mA loop measurement faults.
- Pressure port leaks on one channel.
- Display, keypad and battery faults.
FAQs
Only one of my two sensors is off – do you repair both? We verify both channels regardless of which one you report, because a single-channel check is exactly how the other one gets missed.
This unit is used for custody transfer. How is accuracy documented? Both sensors are verified against reference standards and the measured results are documented for your records.
Every repair carries a 90-day parts-and-labor warranty, with a firm quote before any work begins. Email us or submit a service request.





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