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CPS GS40 Electronic Combustible Gas Leak Detector

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Original price $249.65
Current price $216.37
Currently 2 in stock.

CPS GS40 Electronic Combustible Gas Leak Detector

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The GS40 is a low maintenance, easy-to-use, and completely self contained combustible gas leak detector designed to pinpoint gas leaks in the most demanding applications. 

An efficient and sensitive gas sensor is combined with solid state circuitry which provides an audible alarm that increases in pitch as the concentration of the gas increases. An advanced semiconductor sensor and electronic control package enables detection of gases commonly found in service applications including: carbon monoxide, natural gas, propane, ammonia, methane, acetone, hydrogen, and iso-butane, with a virtually instantaneous alarm response period. Applications include the inspection of furnaces, valves, regulators, pipelines, meters, and other devices associated with  combustible gas. A visual indication is also provided as well as provisions for an earphone for use in noisy environments. The GS40 is designed and manufactured in USA with U.S. and globally sourced components.


  • Alarm Indication: Both visual and audible (>40db) alarm indicators
  • Sampling: Natural diffusion
  • Sensitivity: 25 TO 1000 PPM, depending on the type of impurity
  • Sensor Warm Up Time: Approximately 30 seconds
  • Response Time: Less than 20 seconds
  • Operating Temperature: 15 ˚F to 104 ˚F (-10 ˚C to 40 ˚C)
  • Power Requirements: 4 AA alkaline or NiMH batteries
  • Battery Life: Approximately 20 hours with AA alkaline batteries and 10 hours with NiMH
  • Weight: 13.5 Oz. (380 g.)
  • Dimensions: 8 in. x 2.7 in. x 1.5 in. (20.3 cm. x 6.9 cm. x 3.8 cm.)
  • Probe Length: 18 in. (46 cm.)


Detecting Range  0 – 100% LEL referenced to methane
Alarm Indication Both visual and audible (>40db) alarm indicators
Low Level Alarm Preset at 10% Methane LEL
High Level Alarm Preset at 30% Methane LEL
Operating Conditions 0°F to 140°F (-20°C to +40°C) at less than 98% RH (non-condensing)
Power 3VDC working voltage using four 1.5V AA batteries
Battery Life/Indicator 20 hr continuous use. Orange LED constant on when low battery
Sampling Natural diffusion
Dimensions 7.2″ x 0.71″ (183 x 18 mm)
Weight 18 oz (500g) including battery

Partial List of Detectable Gases

• Acetylene (50 ppm)
• Ammonia (30 ppm)
• Benzene (150 ppm)
• Butane (25 ppm)
• Carbon Monoxide (1000 ppm)
• Ethanol (25 ppm)
• Hydrogen (25 ppm)
• Hydrogen Sulfide (10 ppm)
• Isopropanol (100 ppm)
• Methane (Natural Gas) (30 ppm)
• Methanol (50 ppm)
• Methyl Ethyl Ketone (50 ppm)
• Propane (25 ppm)

Includes:  Fabric Carrying Case, Earphone

**All warranty claims will be handled according to the CPS Products warranty policy.**