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 m...