Shawcity, Ion Science Ltd, Quest Technologies (Part of the 3M group), Sperian Instrumentation, Sensidyne, RAE Systems, Gas Data
VOC/PID Detectors, Single Gas Detectors, Multi Gas Detectors, Benzene Specific Detectors, Noise Measurement Instruments, Sound Level Meters, Vibration Measuring Instruments, Fixed Gas Detectors , Ground Gas Monitors