Description
Fluke 721-3605 Pressure Calibrator Repair
The Fluke 721-3605 is a dual-sensor precision pressure calibrator — it carries two internal pressure sensors (here a 36 PSI and a 5000 PSI range) for measuring and calibrating pressure across a wide span, common in gas custody-transfer and process work. Its precision lives in those two sensors and the measurement circuit, which is where service and calibration focus.
June Company repairs and calibrates the Fluke 721-3605 for process and instrument-calibration technicians.
Common Fluke 721-3605 problems we fix
- Pressure-sensor drift — the low- or high-range sensor drifting out of spec, recalibrated against standards.
- Leak in the pneumatic / pressure connection — fittings or seals that stop it holding applied pressure, repaired.
- mA/loop functions faulty — the electrical measurement side, restored.
- Display or battery faults.
- Reads erratically — measurement-circuit faults, repaired.
FAQs
One of my pressure ranges reads wrong — fixable? Yes. We recalibrate each internal sensor independently so both ranges are accurate, with a NIST-traceable certificate.
Do you verify both sensors? Yes — each range is checked against our reference standards.
Every repair includes NIST-traceable calibration and a 90-day parts-and-labor warranty. Email us or submit a service request.









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