Salinometers; Spyglasses; Acoustic sound alarms; Alarms for the detection of inflammable gases; Carbon dioxide detectors; Carbon monoxide detectors; Device for testing the function and effectiveness of smoke detectors, carbon monoxide detectors and heat detectors featuring an aerosol spray; Electronic-based instruments for measuring environmental parameters including humidity, mold, bacteria, air quality and water quality; Environmental monitoring system comprised of meters and sensors that measure pressure, humidity, temperature and includes alarm and reporting functions; Passive infrared detectors; Safety sensors, namely, carbon monoxide detectors, smoke detectors, and combination carbon monoxide and smoke detectors; Sensors for the determination of temperatures, positions and distances; Smoke alarms; Technical measuring, testing and checking apparatus and instruments for measuring, testing and checking the temperature, pressure, quantity and concentration of gas and liquids; Thermo-hygrometers