Surface Thermocouple K Type High Temperature Resistance Probe (1 Meter) This is a great thermocouple wire with a K-Type sensor model TF-1. The sensor is at the tip of long wire probe, which has a durable fiber glass insulation.  It has a miniature type connector that will work with digital K-type thermometers. The surface thermocouple is designed with k type connector with an insulated wire. It can be used with k type digital thermometer to measure the temperature with 0 to 600 °C Range of air and gas. This probe can be used to measure air or gas temperatures, it can be attached to pipes or embeded into objects you want to measure. Also check the K-type Temperature Thermocouple (1 Meter) It has an operating voltage of 3 to 5.5 DC and is mainly used for temperature measurement. The thermocouple has a detection range from 0 degrees Celsius to 400 degrees Celsius.