Review on 💧 Premium Balboa Water Group Sensor Assembly with Temperature and High-Limit Sensors: A Perfect Fit for Efficient Water Control by Ryan Hampton

I didn't install either of these two because they were for another spa (not Balboa) and the wrong resistance @ "Rt" curve for mine 2004 Cal Spas have the Maddox/MEI-039-900 board. For others who need this information, these two metal case thermistors from Balboa have an "Rt" value when calibrated (25 degrees Celsius = 77 degrees Fahrenheit) of 33 kΩ. My spa (non-Balboa) requires an Rt calibration value of 50kΩ, so I never installed them. Sensor physical dimensions: 0.25 inch OD x 1.5 inch length (6.3 mm x 38 mm) and 0.38 inch OD x 2 inch length (9.5 mm x 50 mm).