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 fastly.K type Thermocouple with flexible spring built in.2 terminals for easy connection.Temperature measurement range is from 0 celsius to 800 celsius degree.Widely used for industrial or laboratory to test equipments temperature.Product Name : ThermocoupleTransfer Type : KTemperature Range : 0-800CThread Diameter : 8mm / 3.1 inch Probe Diameter : 5mm/ 0.1 inch Fork Terminal Spacing : 4mm / 0.16 inch Probe Length : 100mm/ 4 inch External Shielding : Metal ShieldTotal Length : 2m / 6.5FtColor : Silver ToneMaterial:Nylon Braided Cable + MetalWeight : 42gPackage Content : 4 x ThermocoupleOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.