HT-1805 4 in 1 Portable Gas Tester Detector Poisonous O2 CO H2S LEL Gas Density Monitor

Features: HT-1805 detects concentration of O2, CO, H2S and LEL(inflammable gas) Light alarm function, more intuitive to the user to recognize the danger by the light warning Vibration and buzzing alarm function, the user can obtain the alarm signal effectively and timely to keep away from danger TWA(Time Weighted Average): Within the limit, poisonous gas will not produce harmful influence on workers who are exposed to it every day STEL(Short Term Exposure Limit): With time weight of 15 minutes, calculate the average value by measuring many times in 15mins High concentration, Low concentration, TWA & STEL alarm setting, the user can freely set the values Back-light design, you can hold down the "ENT" key to switch on/off back light Liquid crystal display screen, anti-reflective and anti-dazzling, provides an excellent viewing experience Specification: Size: Approx. 135mm x65mm x43mm/5.31x2.56x1.69" Detection: O2, CO, H2S & LEL(inflammable gas) Power supply: Built-in 3.7V lithium battery O2 measuring Range: 0 ~ 30% Resolution: 0.1% LEL measuring Range: 0 ~ 100% Resolution: 1% H2S measuring Range: 0 ~ 500 PPM, Resolution: 1PPM CO measuring Range: 0 ~ 9999 PPM, Resolution: 1PPM Working temperature: -10~50C Storage temperature: 0~50C Working humidity: 15%~90%RH (No condensation) Notice: Please be kept away from water, fire, strong/hot wind, or sites with strong electromagnetic interference to prevent influence on/ damage to the device Avoid to use damp cloth or corrosive detergents for the cleaning of instrument case Package includes: - 1 x HT-1805 Four-in-one Gas Detector(With the main accessories) - 1 x Adapter - 1 x USB Cable - 1 x English Manual - 1 x Carrying Case Details pictures: