The E+E EE82 CO2 Switch is designed for harsh climate control applications such as life stock barns or storage of fruit and vegetables. The robust enclosure has been tailored for best protection of the CO2 sensing cell. The CO2 measurement is based on the Non-Dispersive Infrared (NDIR) technology. A patented auto-calibration procedure compensates for the aging of the infrared source and leads to outstanding long-term stability. The EE82 is available with measuring ranges of 0 to 2000/5000/10000ppm. The switch threshold and hysteresis can be set with potentiometers on the printed circuit board.