Siemens 540-660B ROOM TEMPERATURE SENSOR, WHITESiemens 540 660B Room Temperature Sensor, WhiteThis Room temperature sensor provides accurate, reliable sensing of room temperature for terminal Equipment Controller (TEC). This sensor has a flush mounted override button and a high accuracy set point slide. The sensor measures 3 11 32 high x 2 1 2" wide x 1 1 2" deep, is white and the temperature monitoring range is 55 to 95 Degrees Fahrenheit (13 to 35 Degrees Celsius)." The Series 1000 Room