Description
Fluke 721-3605 Pressure Calibrator Repair
The Fluke 721 is a dual-sensor pressure calibrator — it measures two independent pressure ranges at once (this 3605 variant pairing a higher static range with a low line range) plus the mA loop signal, ideal for gas-flow and custody-transfer measurement. Its precision lives in the two internal pressure sensors and the mA circuit, which is where service and calibration focus.
FlukeMeterRepair.com repairs and calibrates the Fluke 721-3605 for gas-measurement and instrument-calibration teams.
Common Fluke 721-3605 problems we fix
- Pneumatic-system leaks — a leak that stops a range holding applied pressure, repaired.
- Dual-sensor drift — one or both internal sensors drifting out of spec, recalibrated against standards.
- Over-pressure damage — sensor damage from an over-range event on either range, assessed and repaired.
- mA measurement faults — the loop measurement, recalibrated.
- Display or battery faults.
FAQs
One range on my 721-3605 reads wrong — fixable? Yes. Sensor and leak faults are repairable and recalibrated against our reference standards so both ranges and the mA function are accurate, with a NIST-traceable certificate.
Are both sensors verified? Yes — each pressure range is checked against our standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or request service.
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