The package of NTC thermistors is Bulk. It is included in the Cylindrical Probe, Glass package for convenience. A NTC thermistor's resistance tolerance is ±20% in order to work. Temperature -60°C~300°C should be set on NTC thermistors for reliable performance. The terminations on these NTC thermistors total 2 for a total of 2 terminations. To ensure that NTC thermistors work properly, their 2 pins must be connected.