ITEM NAME:2M Wire Temprature Sensor Earth Thermocouple Probe J Type 205mm x 1.5mm A4D4 2M Wire Temprature Sensor Earth Thermocouple Probe J Type 205mm x 1.5mm A4D4 Product Name : Thermocouple;Transfer Type : J;Message Type : Earth Temperature Range : 0 to 500 Celsius;Probe Size : 205 x 1.5mm / 8.1" x 0.06" (L*D);Wire Length : 2M / 6.6Ft External Material : Plastic, Metal;Fork Terminal Quantity : 2 Fork Terminal Spacing : 4mm / 0.157";Color : As Picture Shown Weight : 46g 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. Widely used in science and industry applications including temperature measurement for kilns, gas turbine exhaust, crude oil engine engines, and other industrial processes. Package Content : 1 x Thermocouple Note:Light shooting 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.