Brand: FORENSICS DETECTORSModel: FD-90A-O2User Manual: Click HereBlog Article: Click Here Features: 🔬 ACCURATE: Professional and accurate OXYGEN (O2) gas detector, 0 - 30% with 0.1% resolution. Electrochemical sensors. 🌷 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, dust-proof, and explosion-proof with belt clip. 🕵️ TRUSTWORTHY: 1-year limited warranty. Arrives with a signed and dated calibration certificate. Details: The professional OXYGEN gas detector by FORENSICS has all the advanced features and functions, made with the highest quality electrochemical sensors. Perfect for R&D, life science biotech research, personal protection, ambient air measurements, and industrial oxygen deficiency PPE. Not to be used as a continuous indoor monitor. Use FD-60-O2 for indoor continuous oxygen monitoring. Comes factory-calibrated. 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 Items (DIY sold separately): Calibration Gas (N2)Calibration Gas Regulator (C10)Bump Gas (N2)Tubing Other Accessories (sold separately): Gas Sensor Replacement (O2)Gas Detector Hard CaseGas Detector PouchGas Detector Stand Pump and Probe Specifications Oxygen (O2) Detection Range: 0 - 30% with 0.1% resolutionRecommended Calibration Period: 12 monthsGas Sensor Type: Electrochemical Gas SensorGas Sensor Life: 2 - 3 yearsError: ≤ ± 5% F.SResponse Time: < 30 secMax Pressure: 1 ATM (1 bar)Indicators: 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