Portable Gas Detector, Combustible Gas Alarm, Breath Alcohol Tester manufacturer / supplier in China, offering Handheld IP66 6-in-1 Multi Gas Detector with Built-in Pump (E6000), Portable Lel (HC gases) Single Gas Detector Rechargeable Battery IP65 (BX176), Semiconductor Personal Breathalyzer with Backlight LCD Digital Display (AT188) and so on.