CO2Meter.com CH-A3 Alphasense 2.5% Pellistor Gas Sensor

The CH-A3 Alphasense Pellistor Gas Sensor (formerly known as AP-0012) detects low levels of flammable hydrocarbon gases including methane, ethane, propane, butane, acetylene, ethylene and isobutylene in ambient air. This 20mm diameter sensor is the industry standard size for portable gas detectors. All pellistors are housed in certified flameproof chambers. For Sensor Tube Caps, please look under the "Accessories" Tab Features 0 to 100% LEL methane High quality, low power Excellent poison resistance