Multigas 4 Gas Monitor | with USA NIST Calibration Certificate | CO, H2S, CO, EX LEL |

A professional multi-gas detector with all advanced specifications, features and functions made with premium electrochemical gas sensors that are Made in the UK. This detector features the most advanced 32-bit microprocessor with Color LCD and graphing capability. Made for industrial use for utility workers, refinery workers, firefighters, maintenance engineers, those who spend time in sewers and waterworks, underground storage tanks, oil rigs, in tanks and silos in the maritime industry, and many others who need personal protective equipment to know that the atmosphere is healthy. Product comes with the Multi-Gas Detector, English Manual, USB recharge cable, Calibration Cover and nut to secure. 100% customer satisfaction. Comes FACTORY CALIBRATED. Open the box, turn ON and GO. 100% QA by real sensor and gas detector engineers. 100% product test and verification in California, USA! 100% quality guaranteed. Arrives with calibration and QA certificate. Specifications: Natural diffusion sampling method (no pump). Combustible gas (LEL) 0-100% with 1% resolution. Oxygen (O2) 0-30% with 0.1% resolution. Carbon Monoxide (CO) 0-999 with 1ppm resolution. Hydrogen Sulfide (H2S) 0-100ppm with 1ppm resolution. Comes factory calibrated. Accuracy: ≤±5% F.S. Response Time: ≤30s. Working environment: -20℃～50℃, ＜95%RH (no dew). Power Source: DC3.7V Li-on battery, 2000mAh. Gas Sensor Life: 2 years. Explosion-proof grade: Ex ib IIB T3 Gb. Protection Grade: IP65. Weight: 400g (with battery). Dimensions: 130mm×67mm×30mm (L × W × H). 100% customer satisfaction. 100% QA by real sensor and gas detector engineers. 100% product test and verification in California, USA. 100% quality guaranteed. Arrives with calibration and QA certificate.