Alarms for the detection of inflammable gases; Carbon dioxide detectors; Carbon monoxide detectors; Electronic carbon dioxide monitors, other than for medical purposes; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Fire and smoke detectors; Gas alarms; Gas detectors for detecting the presence of gas; Gas testing instr...