Typically, NTC thermistors are packaged in a Bulk package. In order to make things easier, it is included in the package Pipe Sensor Assembly. A NTC thermistor must have a resistance tolerance of ±3.6% in order to operate. For reliable performance, NTC thermistors should be set to 5°C~85°C. Temperatures of 155°C provide reliable operation of NTC thermistors. It's best to operate NTC thermistors at -55°C for reliability. In order for NTC thermistors to work properly, they must have their 2 pins connected. The thermistors set their maximum power to 18mW.