Siemens 536-784B FLUSH MOUNT ROOM TEMPERATURE SENSOR, 100K OHM (NTC), WHITE PLASTIC COVERSiemens 536 784B Flush Mount Room Temperature Sensor, 100K Ohm (NTC), White Plastic Cover Flush mount room temperature sensor with a 100,000 Ohm (NTC) sensing element. This room sensor has a temperature range of 40 to 257 deg F ( 40 to 125 deg C) and is designed for those applications where a covered room temperature sensor is not acceptable. It fits over a 2 x 4 electrical conduit box and uses a pigtail connection. This unit has a white plastic