Пољопривредна школа са домом ученика

How to make Water Level Indicator. Water Level Indicator generates a sound with the help of buzzer when a water level in a tank reaches to its preset level (Predefined Mark-max level,midle level or some other). Instead of a buzzer, it is possible to install a small light bulb that will light up when a certain level of water is reached. A number of regularly connected LEDs can also be installed to measure more different water levels in a court. This is a simple explanation of how we get information on the amount of fuel in the tank, oil in the engine, ... It has wide application from the agricultural, industry, to home use.