The E+E EE451 temperature sensor is designed for temperature measurements in heating, ventilation and air conditioning systems enabling weather-dependent temperature regulation. In addition to active outputs 0 to 10 V or 4-20 mA various types of sensing elements such as Pt1000, NTC10k or Ni1000 are available for passive temperature measurement. The innovative enclosure concept (IP65) with a mounting bracket allows for easy installation and unbiased detection of ambient temperature. The optional adapter EE-PCA and the free configuration software EE-PCS facilitate the adjustment and setup of the active temperature sensors.