Model : OH-4A Without Pump Multi gas detector Gas – O2, LEL, H2S , CO Comes with charger, calibration certificate & manual OH-4A Portable Multi Gas Detector OH-4A portable multi-gas detector could detect combustible gas, O2 and other two types toxic gases continuously and simultaneously. It is widely used in the area where explosion-proof is required or toxic gas leaks, like underground channels or mining industry, so as to protect the workers' life and avoid damage on the relevant equipment.Detecting gas: Combustible gas, H2S, CO, O2 *Natural diffusion sampling method and high-sensitivity sensor, with high sensitivity and repeatability. *32-bit built-in MCU, high reliability and self-adaptation ability. *Full functions, easy operation. *Large LCD, more intuitionistic, abundant and clear indication. *Compact design, easy carrying. *High strength engineering plastics and compound anti-slippery rubber; high strength, water-proof, dust-proof and explosion-proof. Accuracy ≦±5% F.S. Response Time ≦30s Indication LCD displays real-time and system status; LED, audio and vibration alert for gas leakage, fault and low voltage. Sensor O2 /H2S / CO: plug-in electrochemical sensor; Combustible gas (LEL): plug-in catalytic combustion sensor. Working environment -20℃～50℃, ＜95%RH (no dew) Alarm Type low & high alarm, multiple gas alarm, sensor alarm, battery low alarm, prompt tone, automatic shutdown alarm Backlight Automatically activated when working in poor lighting environment or the alarm sounding or the button is knobbed down. Power Source DC3.7V Li-on battery, 1800mAh Charging time 6h~8h Working time ≧8h continuously (without alarming) Gas Sensor Life 2 years Explosion-proof grade ExiaIICT3 Protection Grade IP65 Weight Appr. 400g (with battery) Dimensions 130mm×67mm×30mm(L × W × H) Standard accessories Suit case packaging, 1pc; Charger, 1pc; Warranty :1 year

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