Thick wire with ceramic insulation stands up to extreme temperatures in forging, die casting, and heat treating. These probes have an exposed tip that's quick to respond to air and surface temperature changes but can't be used in liquids. Pick the thermocouple type that best covers the temperature range you expect the air or surface to be. You should also make sure the thermocouple type you choose is compatible with the device you plan to connect it to. They're often used with temperature controllers, thermometers, and other temperature-reading devices.

These probes are manufactured to conform to ASTM E230 for accuracy. Accuracy is how far off the reported value is from the actual temperature.

Note: When installing probes with wire leads, the red wire is negative.