Toxic gas detector system having convenient battery and sensor replacement

摘要: A detector system for sensing the presence of a toxic gas, such as carbon monoxide, and sounding an alarm. The gas is detected by passing light through biomimetric material that darkens in gas. includes housing containing emitter, mechanism contained cell, which, together with battery to power system, are mounted drawer insertable into housing, which has openings permitting ambient air reach material. When fully inserted, positions cell between emitter brings contacts connection contact s Both must be replaced periodically, typically about once every three years. configured so it cannot inserted without place. easily drawer. microporous filter preferably placed prevent contamination large airborne particles.