Compound Gas Monitor adopts high-quality gas sensors,which displays safety and reliability with accurate measurement and stable performance.It has excellent sensitivity and repeatability,easy to use and maintain,and meets the requirements by safety monitoring industrial site for high reliability of the equipment. The shell is made of high-strength engineering plastics and compound non-slip rubber,dust and explosion-proof,with high strength and smooth handfeel.Compound Gas Monitor is widely used in petroleum,chemical,environmental protection,metallurgy,refining,gas transmission and distribution,biochemical medicine, agricultural research,etc. Features: * Color-screen display,user-friendly interface * Bilngual choices:Chinese/English * Three alarm forms:sound/light/vibration * Data recording and review function,continuously record120,000 data * Charging function * Measurement of four gas concentrations: oxygen(O2),Carbon monoxide(CO),Hydrogen sulfide(H2S),combustible gas(LEL).