Features with 2 meter long, 7.7mm thread diameter, 50mm 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. Grounded type is more sensitive to temperature, can help to measure temperature fasterly. K type Thermocouple with flexible spring built in. 2 terminals for easy connection. Temperature measurement range is from 0 celsius to 400 celsius degree. Widely used for industrial or laboratory to test equipments temperature.