Resistance temperature sensors are suited for applications where accuracy and stability are essential for proper control in applications that operate at or below 1200°F (650C). RTDs, available in a variety of styles and constructions, are specially designed to ensure precise and repeatable temperature measurement for a wide variety of applications. Thermistors are ideal for applications where fast time response and high change in resistance over a limited temperature range is required. Maximum operating temperature on Watlow thermistors is 572°F