Features with 1Meters long, 8mm thread diameter, 3. 5cm 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 500 Celsius degree. Widely used for industrial or laboratory to Test equipments temperature.