Made by Gecko
Thermostatic Probe Type 2
The probe slides in to the pocket somewhere (usually near the middle of the tub) so it is submersed in the water away from the heater. The red flat plastic 4-pin (3 wires) plug plugs straight on to the PCB.
Cable Length: 297cm
Possible replacement for Gecko Part : Regulation Probe 9920-400342
This temperature sensor works on Gecko, Spa builder and Hydroquip control systems.
it is easy to fit if your repairing your hot tub or spa because it simply plugs in on both ends.