Optical water level sensor wiring

[Rob F]

Hi Notorious.jatt, that's the sensor I was originally using for the main ATO sensor but they were unreliable so I've stopped using them. Be careful not to get water where the cable goes in the sensor and clean it often, it can get a scum on it quickly and start causing false readings. With all that said you should be able to connect it directly to the main ATO port as your board will have those needed resistors on it. This image has the wire colors marked on it so do like it.