Directory Organisation

Organisation

City Technology Ltd., UK

Area of Expertise

Apparatus and Technique

PGMs Used

Platinum

PGM Knowledge

Pellistors employ catalytic combustion to measure combustible gases or vapours in air up to the Lower Explosive Limit (LEL)* of the gas.

The standard sensor consists of a matched pair of elements, typically referred to as a detector and compensator (reference element). The detector comprises a platinum wire coil embedded within a bead of catalytic material. The compensator is similar except that the bead does not contain catalytic material and as a consequence is inert.