This gas sensor is a compact, solidstate, fixed-installation single alarm monitor designed for continuous area monitoring of combustible gas.

• Self-check feature signals sensor failure
• Reliable operation and fail-safe configuration
• Electronic circuitry ensure trouble-free, long-term operation
• No pumps, filters or chemical cells to replace or maintain
• Alarm level can be adjusted by using a different calibration gas concentration

The standard configuration has a buzzer and normally operating open relay, a fail-safe normally operating closed relay is field selectable.

A red LED (light-emitting diode) and audible 70 dB alarm activate when the concentration of gas exceeds the factory-set (and user-adjustable) level. A green LED indicator on the monitor shows that power is connected and it is a safe condition. This is designed to mount on any indoor vertical surface. Mount the monitor in the desired location using the adhesive backing provided with the module or with screws through the mounting flange.

A sensor self-check feature will flash the LEDs on and off alternatively and sound an interrupted tone as a warning should the sensor fail (open circuit).

Typical applications include combustible gas monitoring in basements near waste dumps, manhole, tanks, parking garages and vehicle maintenance facilities, laboratories and chemical plants.