Feature: 1. 32 Bit Microprocessor: The gas concentration detector adopts 32 bit microprocessor with high speed and high accuracy processing circuit to realize fast and accurate measurement. 2. Range: Gas detector detection for CO 0‑500ppm, O2 0‑30% VOL, Ex 0‑100percent LEL, H2S 0‑50ppm. And with Chinese and English switching display function. 3. MiniUSB: Gas concentration analyzer reserved for external USB interface, use USB cable to communicate with the computer, realize data export and delete. 1000 alarm records. 4. 3.5inch TFT Color Screen: The gas analyzer has 3.5inch TFT color screen display, resolution 480x320, full range of temperature digital compensation. 5. Storing Historical Data: The gas concentration analyzer can store 100000 historical data, and the interval of historical data storage can be set freely. 6. Keypad: Our gas concentration analyzer can easily realize the parameter view, setting and other operations, by modifying the coefficients, you can realize the switch between different units, such as ppm and mg/m3. Specification: Item Type: Gas Concentration Detector Housing Material: PC Protection Grade: IP65 Accuracy: ≤±3%F.S. Main Units Include: ppm, ppb, mg/m3, ug/m3, %VOL, %LEL, etc. Operating Temperature: -20-50℃ Ambient Humidity: 10-95%RH Non Condensing Data Interface: MiniUSB Interface, And The Charging Interface Into One Charging Interface: 5VDC, And Data Interface Into One Battery Capacity: Rechargeable Lithium Battery 5400mAh x 1 (With Built In Battery Delivery) Detection Method: Pump Suction, Pump Speed Can Be Fine Tuned. Package List: 1 x Detector1 x Detection Probe1 x USB Cable2 x Key1 x Storage Box1 x Instruction Manual