Portable Gas Detector Model: ATS-103M. On Start Up, The Instrument Automatically Goes Through Complete Self Integrity Check, On Demand. The Press Of Sampling Switch Initiates The Sampling Through Suction Analysis And Digitally Displays The Results. “Hold Key” Enables Monitor/Analysis for a Particular Parameter of Interest. 1. Water-proof process from different aspects, IP66 is guaranteed 2. The use of silicone rubber ring effectively increased friction between hand and this device, thus device is protected from being fallen from hand 3. The plug-in sensors and battery compartment will ensure easier replacement of these parts. 4. Sound, light, vibration 3-mode alarms 5. Product number, calibration due date, auto zero function are automatically displayed during the startup self-test, this enables users operate and maintain this device more convenient SPECIFICATION: Gases detected : CH4/LEL, O2, H2S, CO Measuring range : CH4: (0.00~5.00)%vol (Optional) LEL: (0~100)%LEL O2 : (0~30.0)%vol H2S: (0~100)ppm CO: (0~1000) ppm Resolution ratio : CH4: 0.01, LEL: 1%LEL, O2: 0.1%vol, H2S:1ppm, CO: 1ppm Sensor : High quality catalytic sensor for LEL Electrochemical sensor for H2S, CO & amp; O2 Sensor lifetime : ≥ 2years Response time : CH4: ≤20S ( T90 ), LEL: ≤20S ( T90 ), O2: ≤35s(T90), H2S: ≤45S ( T90 ), CO: ≤45s (T90) Alarms : Audible--buzzer with ≥85dB @1m audible Visible--flashing red LED, ≥20m visible Vibration Alarm point : High and low, fully adjustable Temperature : -25 Deg. C to +55 Deg. C Continuous working time : ≥13hours Display : Liquid Crystal Display(LCD) Battery : 3.7V/1500mA Charging time : 4-5 hours Dust and water resistance : IP67 Size & amp; Weight : 136*70*37mm, 250g