The NS Hi-Limit Thermistor Assembly is a vital safety component engineered for use with Watkins spa heaters, including Hot Spring, Tiger River, and Limelight models. This sensor helps protect spas by monitoring water temperature and shutting off the heater if it exceeds 118°F, preventing overheating and potential system damage. Its 2-pin Molex connector ensures a reliable electrical connection, and the threaded 1/2” fitting with one O-ring allows for a quick, secure installation into the spa’s heater housing. Built with corrosion-resistant materials, this thermistor delivers long-lasting performance in demanding spa environments.