The TIF8600 is an easy-to-use hand-held CO2/Temperature monitor. The unit provides stable, highly accurate readings due to our patented dual beam NDIR technology. Equipped with a 0-4V output, the unit is perfect for long-term monitoring/recording. The unit features a large, easy-to-read display with a push-button interface which allows for easy calibration, quick adjustments for altitude correction, and simple toggling between ºC and ºF temperature readings. A new feature of the sensor now includes the ability to calculate and display the cfm/person ventilation rate in a space based on the inside/outside CO2 concentration.