The Thermistor Adapter Plug Set is a specialized solution for connecting hi-limit and temperature sensors to older Watkins spa systems. Specifically designed for IQ2000 control systems used between 1995 and 2002, this adapter set ensures compatibility with double-barrel heater configurations, commonly found in Hot Spring and other Watkins spas. It includes two cables that provide secure, reliable connections between your sensors and control system, supporting accurate temperature regulation and safe spa operation. This adapter set is essential for retrofitting or maintaining legacy spa systems with newer sensor components.