4 Gas Monitors and Multigas Detectors Forensics Detectors offers sensitive 4 Gas Monitors and Multigas Detectors. Made for industrial use by utility workers, refinery workers, firefighters, maintenance engineers, those who spend time in sewers, waterworks, underground storage tanks, oil rigs, tanks, and silos in the maritime industry. 4 Gas Monitors Easy to Use. This is our basic 4 gas monitor by Forensics Detectors. Easy to use and incorporates high-quality sensors. Large LCD and with backlight. Robust for industrial use by utility workers, refinery workers, firefighters, maintenance engineers, and those who spend time in sewers and waterworks, underground storage tanks, oil rigs, tanks, and silos in the maritime industry. USA NIST Traceable Source Calibration Have the highest confidence in your gas detection accuracy. Possible only with best calibration practices to USA NIST Traceable Sources. Calibration of this oxygen detector is performed in the Forensics Detectors laboratory, located in Los Angeles, California, USA. What is a 4 Gas Monitor? A 4-gas meter measures gases such as carbon monoxide (CO), oxygen (O2), hydrogen sulfide (H2S), and combustibles (EX). When air quality is compromised, these devices are used for personal protection. Examples of hazardous gas environments include confined spaces such as tanks, vessels, silos, and tunnels. 4 gas monitors warn the user through audible, visual, and vibration alarms. Included 4 Gas Monitor Stainless Steel Belt Clip Calibration Cap and Screw USB Charging Cable USA NIST Calibration Document USA Operations English Color Manual FD-4A FD-4A-PUMP FD-4S FD-4S-PUMP FD-600-4GAS Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Customer Reviews 4.3 out of 5 stars 104 4.6 out of 5 stars 46 4.3 out of 5 stars 92 3.9 out of 5 stars 26 4.9 out of 5 stars 20 Price $225.45$225.45 $299.45$299.45 $275.45$275.45 $345.45$345.45 $598.45$598.45 Gases Detected CO, H2S, LEL, O2 CO, H2S, LEL, O2 CO, H2S, LEL, O2 CO, H2S, LEL, O2 CO, H2S, LEL, O2 Error better than 5% F.S. better than 5% F.S. better than 5% F.S. better than 5% F.S. better than 5% F.S. Response Time 24 hours Power Source DC 3.7V Li-on battery, 2000 mAh Sensor Life 2-3 years Analyzer Dimensions & Weight 130 mm × 67 mm × 30 mm (L×W×H) & 230 grams Explosion Rating / Ingress ATEX certified Ex ib IIC T4 Gb Recommended Calibration Period 12 months Gas Sensor Type Electrochemical (CO, H2S, O2) & Catalytic (EX LEL) Calibration Location Los Angeles, California, USA Alarm LED, Buzzer, and Vibration