Air quality measurement apparatus, namely, particle counters; Air analysis apparatus; Aerometers; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Mass air flow (MAF) sensors; Gas testing instruments; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Gas alarms; Apparatus for analysing gases; Gas sensors for measuring gas concentration; Gas detectors for detecting the presence of gas; Alarms for the detection of inflammable gases; Combustible gas concentration detectors; Smoke detectors; Fire and smoke detectors; Smoke alarms; Safety sensors, namely, carbon monoxide detectors, smoke detectors, and combination carbon monoxide and smoke detectors; 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; Carbon monoxide detectors; Device for testing the function and effectiveness of smoke detectors, carbon monoxide detectors and heat detectors featuring an aerosol spray
Electrical and Scientific Apparatus