We sell a wide range of sensors (temperature and Hi-Limit), thermostats and spare parts that are compatible with the majority of spa heaters: Balboa, Gecko, Waterway, LX Whirlpool, etc. We also offer parts designed specifically for Jacuzzi and Sundance Spas, HotSpring and Vita Spas, among others.
A temperature sensor, as the name implies, is used to detect the water temperature, which is indicated on the spa's keypad. A capillary thermostat has the same function.
An overheating sensor (called "Hi-Limit") is a safety device programmed to activate when the water temperature exceeds 40°C, the maximum temperature on most spas.