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Small cylindrical metal sensor tip with threaded base

TEST PRODUCTS INTL. A739 Combustible Gas Detector Replacement Tip for 720b

SKU CH-6PZQ-YSSMW

Replacement sensor tip restores detection on 720b combustible gas leak detectors

  • Product typeGround Fault and Current Leakage Testers
  • Replacement sensor tip restores detector sensitivity
  • Compatible with 720b combustible gas leak detector
  • New condition ensures reliable leak detection performance
  • Ground fault and current leakage tester type
  • 739 model number identifies correct replacement part

Replacement Tip for 720b Detector

The A739 is a new sensor tip designed to fit the 720b combustible gas leak detector. It restores the instrument's ability to detect gas leaks when the original sensor wears out or becomes contaminated. Technicians who rely on the 720b for safety checks can return the tool to service quickly with this direct-fit part. No other detector models are supported by this tip.

Sensor Swap Restores Detection

Swapping the tip replaces the sensing element that reacts to combustible gases, so the detector regains its original response characteristics. The accessory is a single replacement sensor with no cables, adapters or calibration software included. Buyers who need a complete detector kit or a different sensor technology will not find those items here.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $38.99
Cheaper than about 59% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameTEST PRODUCTS INTL.
Product typeGround Fault and Current Leakage Testers

Questions about this item

How often should the A739 replacement tip be changed on my 720b detector?

Replace the tip when the sensor no longer responds to combustible gas during a bump test or when the detector fails calibration; there is no fixed interval.

What is the first sign that the tip is worn out during a long leak survey?

Sensitivity drops gradually — the alarm threshold takes longer to reach or does not trigger at known leak concentrations.

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