Details: At the same time to detect and display of methane (CH4), carbon monoxide (CO), the concentration of oxygen (O2), hydrogen sulfide (H2S) Built-in powerful suction pump. Application of places: Petrochemical, coal, metallurgical, chemical, municipal gas, and other places at the scene detection. Special occasions can be measured needs to be trenches, pipes, tanks, sealed containers such as gas leakage detection of detection or. Features: Highly intelligent, simple, stable and reliable. Alarm can be set according to user requirements, two sound and light alarm function. Large-screen LCD display. The battery voltage instructions. Pump start; Dynamic background light function, vibration alarm function (optional). Specifications: Measuring principle: Catalytic combustion sensor (CH4) Electrochemical sensors (CO, O2, H2S) Ordering Model: CD4/B Measuring gas: Methane (CH4), carbon monoxide (CO) Oxygen (O2), hydrogen sulfide (H2S) Measurement methods: Measurement pump suction measurement methods Measurement of CH 4: 0~4.00%CH 4 \ O 2: 0~25.0%VOL CO: 0~1000ppm \ H2S: 0~100ppm Measurement accuracy: CH 4: ± 10% \ O 2: ± 0.7%VOL CO: ± 5% H2S: ± 5% Alarm set point: Adjustable-wide range Battery: Battery display real-time display battery Sound and light show: Highlight the police figures show that the alarm sound level 80 dB Resolution: CH4: 0.01%CH4 \ O2: 0.1%VOL CO: 1ppm \ H2S: 1ppm Xinhua work full time for more than 20 hours (without alarm, closed suction pump) Power: 3.6 V rechargeable lithium batteries Size / weight: 172 ( L ) x68 ( W )x39 ( H ) mm/250g Explosion type: IbdI (150o ) Earthquake antistatic ABS cases Level of security: IP65 Configure: Standard console, charger, leather, brochures, suction tube Choose to target: Handheld probe Built-in gas flow sampling pumps per minute more than 0.5 L, sampling from more than 20 m Automatic zero and calibration Background Light Show Vibration (optional)