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 400 celsius degree.Widely used for industrial or laboratory to test equipments temperature.Product Name : ThermocoupleTransfer Type : KTemperature Range : 0-400 Celsius DegreeThread Diameter : 8mmProbe Diameter : 5mm/ 01"Fork Terminal Spacing : 4mm / 016"Probe Length : 200mm/ 78"External Shielding : Metal Shield Length : 15m/ 492FtColor : Silver Tonematerial: metalWeight : 52gPackage Content : 1 x ThermocoupleNote:Light and different displays may cause the color of the item in the picture a little different from the real thingThe measurement allowed error is +/-1-3 cm.