Siemens 536-768 OUTSIDE AIR TEMPERATURE SENSOR, THROUGH-THE-WALL, 4 TO 20 MASiemens 536 768 Outside Air Temperature Sensor, Through the wall, 4 to 20 mA This outdoor air sensor provides input for accurate loop powered temperature sensing for controllers. It has a temperature range of 58 to 122 degrees Fahrenheit and a mid range accuracy of + 0. 6 degrees Fahrenheit. This sensor allows through the wall mounting for outside air temperature measurements and provides a 4 to 20 mA control signal; uses metal housing. Additional