Brand: FORENSICS DETECTORSModel: FD-90A-O3-LOWYouTube: How to Measure OZONEUser Manual: Click HereBlog Article: Click Here Features: ⚛️ DETECT: Ultrasensitive, low-level OZONE (O3) gas detector, 0 - 5 ppm with 0.01 ppm resolution using a Swiss sensor. 🌷 ACCURATE: Electrochemical cell sensor with error: ≤ ± 5% F.S. and response time: < 30 sec. Zero and span calibration options. 🎆 ALARMS: Adjustable audio, visual, and vibration alarms. Alarms include digital time stamping and logging. Temperature, battery, and time tracking. 💪 STRONG: Shockproof, water-resistant, dustproof, and explosion-proof. Belt clip, charger, cable, and case included. 🕵️ TRUSTWORTHY: 1-year limited warranty. Arrives with a signed and dated calibration certificate. Details: This is an ultrasensitive OZONE detector with 0.01 ppm resolution. It is 10x more sensitive than a regular meter as it employs a high-quality ozone sensor made in Switzerland. Although ozone gas is used in many applications as a "sanitizing" agent, too much can be harmful. Ozone is a reactive gas and a well-documented air pollutant and irritant. The California Ambient Air Quality Standard (CAAQS) for outdoor ozone is 0.09 ppm for a 1-hour average and 0.07 ppm for an 8-hour average. OSHA guidelines state that ozone in the workplace should never exceed 0.1 ppm over an 8-hour day. NIOSH outlines a recommended exposure limit of 0.10 ppm (0.2 mg/m3) and an immediately dangerous to life or health (IDLH) ozone level of 5 ppm or higher. Please note that ozone is unique gas and cannot be calibrated with a calibration gas bottle setup like most gases. Order your ozone calibration service which must be performed in our laboratory with special calibrated equipment necessary to perform ozone gas detector calibration. Included: Gas detector, belt clip, sling, user manual, USB charging cable, calibration cover, and certified calibration certificate. Calibration Options: Calibration Service by Forensics Detectors Calibration Kit:No ozone calibration gas kits exist for ozone since ozone gas must be generated in a special lab. We recommend using our calibration service to calibrate your ozone detector and using our ozone bump tester to validate operation via bump testing. Accessories (sold separately): Ozone Bump TesterPump and ProbeGas Detector Hard CaseGas Detector PouchGas Detector StandGas Sensor Replacement (email us) Specifications Ozone (O3) Detection: 0 - 5 ppm with 0.01 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