Brand: FORENSICS DETECTORSModel: FD-90A-H2SUser Manual: Click HereBlog Article: Click Here Features: 🔬 ACCURATE: Professional and accurate hydrogen sulfide (H2S) gas detector, 0 - 100 ppm with 0.1 ppm resolution. Electrochemical sensor. Comes FACTORY-CALIBRATED. ⚛️ DETECT: Electrochemical cell sensor with accuracy: ≤ ± 5% F.S. and response time: < 30 sec. Zero and span calibration options. Comes factory-calibrated. 🎆 ALARMS: Adjustable audio, visual, and vibration alarms alert when preset levels are reached. 💪 STRONG: Shockproof, water-resistant, dustproof, and explosion-proof with belt clip. 🕵️ TRUSTWORTHY: 1-year limited warranty. Arrives with a signed and dated calibration certificate. Details: The professional hydrogen sulfide H2S gas detector by FORENSICS is the best in its class with many advanced features. Track down H2S sources or monitor the concentration in sewers, waterworks, and other areas. This is our most popular H2S monitor for personal protection and is used by many in the field such as confined space, industrial, water works, agriculture, and oil and gas. This H2S monitor is used for personal protection in hazardous gas environments such as tanks, vessels, silos, pits, manholes, and tunnels. Included: Gas detector, belt clip, sling, user manual, USB charging cable, calibration cover, and certified calibration certificate. Calibration Options: Calibration Service by Forensics DetectorsCalibration Tutorial (DIY) Calibration Kit (DIY sold separately): Calibration Gas (H2S)Calibration Gas Regulator (C10)Bump Gas (H2S)Tubing Other Accessories (sold separately): Gas Detector Hard CaseGas Detector PouchGas Detector Stand Gas Sensor Replacement (H2S) Specifications Hydrogen Sulfide (H2S) Detection: 0 - 100 ppm with 0.1 ppm resolutionRecommended Calibration Period: 12 monthsGas Sensor Type: Electrochemical Gas SensorGas Sensor Life: 2 - 3 yearsError: ≤ ± 5% F.SResponse Time: < 30 secIndicators: LCD indicates the time, concentration, internal temperature, and battery level Alarm: Indication of alarm, fault, and low voltage with LED, sound, and vibrationStore / Operating Temp: 0°F - 122°FStore / Operating Humidity: 24 hoursCharging Time: 3 hoursExplosion Rating: ATEX certified Ex ib IIC T4 GbWeight: 5 oz / 140 g (including battery)Dimensions: 4.3 x 2.3 x 1.7 inchesCalibration Location (USA): Los Angeles, California, USACalibration Standard (USA): USA NIST Traceable Gas SourceCalibration Location (Europe): Athens, GreeceCalibration Standard (Europe): European NPL Traceable Gas Source