Description Specifications Description The TSI IAQ-Calc™ Indoor Air Quality Meter 7545 is ideal for investigating and monitoring indoor air quality. The 7545 instrument measures and data logs multiple parameters simultaneously. Measurements are CO, CO2, 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