Features: 0-400C temperature range, 2 meters long, 7.8mm thread diameter, 10cm probe length thermocouple. A thermocouple is a device consisting of two different conductors (usually metal alloys) that produce a voltage proportional to a temperature difference between either end of the pair of conductors. They are widely used in the field of industry, agriculture, chemical and other automated temperature controlling. K type Thermocouple with flexible spring built in.2 fork terminals for easy connection. Temperature measurement range is from 0 Celsius to 400 Celsius degree.