4. Pt1000 type heat couple with built-in flexible spring 1. Length: 6.6 ft (2 m), Screw Diameter: 0.2 inch (4 mm), Excuse Length: 1.2 inches (3 cm) 3. Grounding type is sensitive to temperature, helping to measure temperature faster 2. The thermocouple separates two different alloy conductors (usually metal) to produce a voltage proportionate to the ambient temperature difference of the conductor 5.Easy connection. Temperature measurement range from -50 degrees Celsius to 450 degrees Celsius. Widely used in industrial or laboratory to test equipment temperature, Manufacturer: huswdw