The NLV10KTC221 is a 10K 2-Wire non-latching thermocouple temperature sensor switch from Viking Industrial Products. It is designed for use in a wide range of industrial and commercial applications, such as HVAC systems, boilers, chillers, air conditioners, furnaces, and refrigeration systems. This device features high accuracy and stability, a calibrated high limit, plus reliable and repeatable operation. It is also UL certified, and rated for operation in temperatures up to 175°C (347°F).