Leak & Gas Detectors
Fieldpiece Instruments offers a variety of leak detectors and gas detectors for HVAC/R field service. Whether you’re looking for tools to perform a quick combustion check, a carbon monoxide detector (hand-held carbon monoxide meter), infrared refrigerant leak detector, heated diode refrigerant leak detector and more, you’ll find it here.


The ACM3 has a fast electrochemical sensor specific to carbon monoxide or CO. It measures CO in parts per million (0-1000 ppm, 2000 ppm max 5 min. exposure time)

Carbon Monoxide Detector Accessory - ACM3

The ACM3 is a carbon monoxide detector (CO detector) accessory head for use with our modular instruments that measures CO in parts per million (ppm). Its electrochemical sensor is fast enough for walk-around tests. Features and benefits include: Advanced, three-pin sensor that measures 0 to 1000 ppm CO; Calibrate / Zero ACM3 to ambient quickly with the zero calibration pot under the grey rubber strip; Auto Power-Off (APO); Use optional pump (AOXP2) for remote / flue gas testing.

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The AOX2 Combustion Check head gives technicians all of the test parameters they need for everyday combustion testing without all of the costly extras they don't need. Measures % O2 and Flue Temp, Calculates % CO2 for Oil and Gas equipment.

Combustion Check Accessory - AOX2

The AOX2 is combustion check accessory head that measures % O2 (percent oxygen) and flue gas temperature. It calculates % CO2 (percent carbon dioxide) for two fuel types: gas and oil. Technicians use the AOX2 to sample flue gas on serviced or newly installed equipment. It eliminates the costly, extra tests found on full-function combustions analyzers that technicians often don’t use or need. Match your results to specifications on the data plate or in the manufacturer’s manual to quickly tune furnaces, boilers and more.

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The SCM3 has a fast electrochemical sensor specific to carbon monoxide or CO. It measures CO in parts per million (0-1000 ppm, 2000 ppm max 5 min. exposure time)

Carbon Monoxide Detector - SCM3

The new SCM3 Carbon Monoxide (CO) Detector is a standalone instrument that measures CO in parts per million (ppm). Its electrochemical sensor is fast enough for walk-around tests. Features and benefits include: Advanced three-pin sensor measures 0 to 1000 ppm CO; Calibrate / Zero SCM3 to ambient quickly with the ZERO button; Audio and visual alarms w/ mute; Bright-blue, backlit dual-display with MAX and real-time measurements displayed; Magnetic hanger for hands-free operation; Auto Power-Off (APO); Use optional pump (AOXP2) for remote / flue gas testing.

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The SOX2 Combustion Check gives technicians all of the test parameters they need for everyday combustion testing without all of the costly extras they don't need. Measures %O2 and Flue Temp, Calculates %CO2 and % Excess Air.

Combustion Check Meter - SOX2

The SOX2 Combustion Check meter measures percent oxygen (% O2) and flue temperature and calculates percent carbon dioxide (% CO2) and percent excess air (% EA) for oil, natural gas and propane fuel-burning appliances. It's designed for everyday combustion testing and tuning, without all of the costly extras found on full-function combustion analyzers – extras technicians tell us they don't need. Easily tune combustion equipment such as boilers and furnaces to the manufacturer’s specifications to increase efficiency and to maximize performance and life expectancy of the equipment.

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The SRL2 Advanced Infrared Refrigerant Leak Detector was designed exclusively for HVACR field service. With rugged construction and exclusive features, technicians call the SRL2 is the best refrigerant leak detector for HVACR.

Advanced Refrigerant Leak Detector - SRL2(K7)

Premium performance in an ergonomic, rugged design. Infrared (IR) sensor exceeds current SAE standards for sensitivity. Find leaks of 0.1-oz./yr. Doesn't trigger on oil or moisture like other sensors. Advanced sensor lasts many years without replacement. Water-blocking filter for added protection. Visual/audible alarms trigger on CFCs, HFCs, HCFCs or blends. Self-calibrates for testing in contaminated environments. Features: non-conductive sensor arm; rechargeable 8-hour lithium-ion battery; peak and mute buttons; % battery charge check; magnetic hanger.

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The SRL8 Heated Diode Refrigerant Leak Detector from Fieldpiece was designed exclusively for the HVACR technician. With rugged construction and features for the way you work, we believe the SRL8 is the best heated diode refrigerant leak detector for HVAC/R.

Heated Diode Refrigerant Leak Detector - SRL8

Excellent performance in an ergonomic, rugged design. Heated diode sensor meets current SAE standards for sensitivity. Find leaks better than 0.1-oz./yr. Water-blocking filter adds a strong layer of protection for the advanced heated diode sensor. Visual/audible alarms trigger on CFCs, HFCs, HCFCs and blends. Automatic or manual calibration for testing in contaminated environments. Features: three sensitivity levels; non-conductive sensor arm; rechargeable, user-replaceable 15-hour lithium-ion battery; mute button; % battery charge check; and magnetic hanger.

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