The Nuova Rade 197347 Stationary Marine Tank Content Level Sensor consists of a float with a magnet inside and a rod with reed switches that activate when approaching the magnet. The model with a 15 cm long work surface and a contact resistance of 0 to 190 Ohm is used to control the level of water or liquid fuel in tanks. The vertical mounting of the sensor allows you to monitor intermediate and limit content levels (overflow, underfill).