Pipe Clamp Thermocouple - If you're working with residential and light commercial cooling systems, use the TC24 Pipe-Clamp Thermocouple to get pipe temperatures fast even if it's hot or windy outside. The TC24 measures temperatures from pipes that are fixed, at any angle, to walls or other surfaces. It's designed to work on pipes or any other cylindrical surface between 3/8? and 1 3/8? and it connects to any measuring device with a Type-K thermocouple jack.