The Siemens 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. This sensor provides input for accurate loop powered temperature sensing (detecting) via a 20 AWG twisted, shielded cable pair. The loop current varies according to the temperature being measured.