Dontek AquaSun Solar Heating Temperature Sensor Pool Side Cold Water Sensor 2.5m Genuine
 
Poolside incoming cold water Dontek solar controller sensor and 2.5m cable
Standard 2.5m cable Cold water Sensor for water coming from your pool
High-quality rubber grommet
 
Genuine Dontek part is compatible with the following types of controllers - Aquasun 2, Aquasun 3, V1, V2, V2-1, V2 Deluxe, V4 and V7
 
This sensor is generally the one that fails and stops your solar controller working and displaying an error code
Easy to install, just pull the old sensor out and rubber grommet
Push the new grommet and sensor into your existing hole.
Requires a 14.5mm hole in the pipework