Hi Limit Sensor 

Part # 6472-525

Two pin, 8" long

Fits the following models:

2015+ J-500 Collection Hot Tubs

9/2015+ J-400 Collection Hot tubs

2016+ J-300 Collection Hot Tubs

2018+ J-200 Collection Hot Tubs

2018+ J-100 Collection Hot Tubs

11/2021+ 800 Optima & Cameo Limited

2018+ 680 Series

4/2017+ 780 Series

10/2016+ 980 Series

2016+ 880 Series