VKTECH 4 in 1 Portable Digital Gas Tester Detector Oxygen LEL CO H2S

Ready stok!!! 4 in 1 Handheld Gas Detector Tester Carbon Dioxide Gas Density Monitor  4 in 1 Portable Gas Detector Tester Oxygen CO Gas Density Monitor Features: This product can detect combustible oxygen, carbon monoxide, hydrogen sulfide, the concentration of the LEL, providing light, vibration, hum, triple alarm function; Let you get effective and timely alarm signal, thus away from danger; This instrument can be used for agriculture, petrochemical, electric power, fire, gas, steel industry, sewage treatment and other fields. Specifications: O2 measuring range: 0 ~ 30%, resolution: 0.1% LEL measuring range: 0 ~ 100%, resolution: 1% H2S measuring range: 0 ~ 500 PPM, resolution: 1 PPM CO measuring range: 0 ~ 9999 PPM, resolution: 1 PPM Working temperature: - 10 ~ 50 ℃ Working humidity: 15% ~ 90% RH (no condensation) Customizable set alarm value Power supply: 3.7 V lithium battery