Handheld Portable High Precision 4-in-1 Gas Detector - Combustible & Toxic Hazardous Gas Meter O2 CO H2S Analyzer Rechargeable This 4 gas monitor is the right choice to protect you and your family's health and property. Our multi-gas detector used advanced integrated circuit technology, embedded microcomputer control, high-tech imported gas sensor, excellent sensitivity, and repeatability. Applicable Occasions and Crowds: Robust for industrial use for utility workers, refinery workers, firefighters, maintenance engineers, those who spend time in sewers and waterworks, underground storage tanks, oil rigs, tanks, and silos in the maritime industry, and many others who need personal protective equipment. This item supports testing for CO, O2, H2S, and EX. The range on this device for these gas are: EX: (0-100)%LEL, low alarm: 20% LEL, high alarm: 50%LEL, resolution:1%LEL. H2S: (0-100)ppm, low alarm:10 ppm, high alarm: 35 ppm, resolution: 1 ppm. CO: (0-1000)ppm, low alarm: 50 ppm, high alarm:150 ppm, resolution: 1 ppm. O2: (0-30)%vol, low alarm: 19.5%vol, high alarm: 23.5%vol, resolution: 1%vol. Wide Application Easy Carrying Around: This multi-gas monitor detector comes with a super nice padded case with compact size and clip design. Easy to use with a clipping right on your cloth and keep your safe the entire time while working in confined space, effectively predicting as to ensure the safety of the environment. High Sensitive and Accurate Measurement: The portable 4 gas detector with high quality imported gas sensor, excellent sensitivity and excellent repeatability, Comes FACTORY CALIBRATED. Open and use directly. Three Alarm Methods: The portable gas detector is ready to use, comes with adjustable audio, visual, and vibration alarms alert when preset levels are reached. Can accurately measure the gas concentration with easy-to-read number shown on the display. Waterproof,dust-proof, explosion-proof and lower error: Detection error better than ≤±5% F.S. and response time: T Less than 30s. Zero and span calibration options. Long capacity 1800mAh battery for long continuous working time. Newly upgraded portable case, using lighter and more durable materials, all-round upgrades, not only upgrades the level of protection, the appearance is also more simple and atmospheric and beautiful! Color: Orange Material: plastic Package Contents: 1 * Gas Detector 1 * USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.