Operating Instructions DuoFern Sun Sensor 9478 F. Tepaße Updated February 04, 2024 10:11 Follow Download PDF Related articles Operating Instructions DuoFern Sun Sensor 9478-1 How to change the sensitivity of the sun sensor? How long does the battery last from the sun sensor. After one hour of shade, the sensor is empty. Operating instructions Sun/Twilight sensor 3711 Initial commissioning of sun sensor 9478-1 (logging on to HomePilot)