Gas Detector, Gas Analyzer, Gas Alarm manufacturer / supplier in China, offering R310p 2-Channel Particle Counter 2.8kg OLED Display USB for HVAC Pharmaceutical Data Center Laboratory Cleanrooms, Online 2.83L/Min Particle Counter 2-Channel USB for HVAC & Pharmaceutical Cleanroom, Laser Airborne Particle Counter 6-Channel 0.3-10.0m Accuracy 0-50c Operation USB LCD Display and so on.