Water level indicator on reed switches
Simple design for determining the amount of liquid in any container. Its great advantage is that it can easily scale to fit under absolutely any size and vessel. For example, you have a tank with rainwater, and you want to constantly monitor the water level in it. There is nothing easier. With this simple level indicator built on reed switches, you can easily implement this control system.You will also need a pair of magnets (from an old hard disk). The tube and the float were printed on a 3D printer, but no one forbids taking a tube made of polypropylene or PVC, and the float can be glued together from something.The idea of the water level indicator operation is that the reed switches are located along the entire length of the tube. This design is immersed in a container of water. On the tube goes float with magnets. And at what level it floats, those reed switches close. Closed reed switches include LEDs and information is displayed on the LED ruler.This wire is inserted into the tube, which is sealed from the bottom, and from above comes a bundle of wires connected to the board. Then we dress a float-magnet, we connect the power. And our level is ready. In work it looks like this:The length of the measuring tube of the sensor can be any other.Since the number of cells in the measurement. Another important advantage is that the system is sealed and the voltage does not touch the liquid in any way.