Description Specifications Description The TSI IAQ-Calc™ Indoor Air Quality Meter 7525 is ideal for investigating and monitoring indoor air quality. The 7525 instrument measures and data logs multiple parameters simultaneously. Measurements are CO2 (carbon dioxide), temperature, humidity; and calculations are dew point, wet bulb temperature, and % outside air. Items Included: Instrument Hard carrying-case (4) AA alkaline batteries Operation and service manual NIST calibration certificate LogDat2 Downloading Software with USB cable AC adapter State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Product Specifications CO2 Sensor Type:Dual-wavelength NDIR Range:0 to 5,000 ppm Accuracy:±3.0% of reading or ±50 ppm, whichever is greater Resolution:1 ppm Response Time:20 seconds Temperature Sensor Type:Thermistor Range:32 to 140°F (0 to 60°C) Accuracy:±1.0°F (±0.5°C) Resolution:0.1°F (0.1°C) Reponse Time:30 seconds (90% of final value, air velocity at 400 ft/min [2 m/s]) Relative Humidity Sensor Type:Thin-film capacitive Range:5% to 95% RH Accuracy:±3.0% RH Resolution:0.1% RH Response Time:20 seconds (for 63% of final value) Literature & Docs Accessories