Combustible Gas Detectors

Combustible gas detectors utilize both catalytic bead sensors and infrared sensors to provide reliable readings in any application.
Catalytic bead combustible gas sensors consist of a reference bead and an analytic bead, wired into a Wheatstone bridge circuit. In these detectors, a small amount of gas is burned on the analytic bead, causing it to get hotter and increasing its resistance and voltage drop. This creates an imbalance of the bridge circuit that is proportional to gas concentration.

​IR gas detectors use band pass filters to pass infrared light in analytical and reference wavelengths through a volume of gas. Both wavelengths’ paths are measured, and the light is reflected back to IR detectors. The target gas reduced the intensity of the analytical beam, but not the reference beam—similar to the way smoke affects visible light. The gas sensor’s reference detector monitors the intensity of the two infrared sources and compensates for the loss of signal caused by dirty optics or source aging.
We offer both open path combustible gas detectors and single point combustible gas detectors. These units are designed to detect a wide range of gases, including acetylene, butane, hexane, methane, propane, and more.