It is a resistance temperature detector(RTD) with high precision and stable performance. The temperature range is -20~420°C.

Features:
Made of stainless steel material， durable for use.
The sensor head， threading， and nut all seem pretty solid.
Temperature range is -20~420°C.
High precision and stable performance.
Suitable for using in machine room， cooling and heating equipment， etc.

Specifications:
Material: Stainless Steel
Temperature Rang: -20~420°C
Element: Pt100(Platinumi)
Protection Tube Length: 5.2mm
Coil Spring: 50mm
Total Length: 2m / 6.56ft
Product Weight: 43g / 1.54oz
Package Weight: 46g / 1.63oz

Package List:
1 * PT100 Thermistor Sensor Probe