Air Quality Probe, CO, CO2, Temp and RH

Indoor Air Quality Probe, Measures CO, CO2, Temperature and Humidity, Range CO 0 to 500 PPM, CO2 0 to 5000 PPM, Temp 14 to 140 F, RH 0 to 95%, Accuracy CO +/-3% of Reading, CO2 +/-3% of Reading, Temp +/-0.5 F, RH+/-3%, For Use With 3ATR6, Includes NIST Certificate