Unique Bargains Vertical Stainless Steel Tank Liquid Water Level Sensor Float Switch

A float switch is a device used to sense the level of liquid within a tank.
Use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, or what ever your project may be.
It can be easily converted from normally open to normally close by invertin the float.
Note: because the current that the switch can carry is much little(0.5A), you must use a relay or contactor when it is connected by a load, relay and contactor are not included here.