The CO2, CO, and O2 Portable Detector is designed to measure carbon dioxide, carbon monoxide, Oxygen, relative humidity and temperature across a variety of applications. With long-term data storage, the user can measure ambient gas levels by data displayed and gain indication by visual and audible alarm settings. Features NDIR (CO2), EC (CO), and Fluorescence quenching by Oxygen (O2) Measures RH% and Temperature Large LCD display for easy readability Audible Alarm Data Logging with 16 GB SD Card LCD Backlight for easy readability by dark Li-ion rechargeable batteries included ABOUT CO2 STORAGE SAFETY CODES This device will NOT meet requirements for CO2 safety monitoring which requires a Fixed/Wall mounted, hard-wired alarm per the NBIC, NFPA, or IFC regulations. Refer to our CO2 Safety Products page for devices that meet your needs. Call us at (877) 678-4259 toll-free or email us to speak with our technical sales team about purchasing the correct device. Applications Food and Beverage Brewing Agriculture Poultry Cryogenics Scientific Medical Safety, and many others Specifications Measures: CO2, CO, O2, PM2.5, PM10, Temp, RH% Sensing method: NDIR, EC, and Fluorescence quenching by Oxygen CO2 Measurement range: 0~9999 ppm CO Measurement range: 0~1,000 ppm O2 Measurement range: 0~25% Temperature: 0~50°C PM2.5,10 Measurement Range: 999 ug/m3 (whichever is greater) CO2 Accuracy: ± 50ppm, ± 5% of reading (0~5,000 ppm) CO Accuracy: ±5%~±10% O2 Accuracy: