Keeping the liquid up to certain level in tank is one of the widely used applications in petroleum and consumable goods producing industries. Certain amount of liquid should be always there in the tank to keep the liquid pressure as it is. To maintain this level there is a need of liquid level controller. It’s…
Liquid/Water Level Indicator with Alarm using 8051 Microcontroller (AT89C51)
This article illustrates the construction and working of a liquid level indicator. Such an indicator is used in tanks to indicate the level of liquids and alert us when [[wysiwyg_imageupload::]]the tank is full. So by this circuit we can monitor the various levels of the tank and can avoid spillage of water and also we can configure our supplies according to the various levels of tank. Such module or circuit can be installed in big buildings where manual monitor of tanks is difficult and its indicator can be placed at some centralised place. Initially when the tank is empty LCD will show the message VACANT. As the tank starts filling up wire at different levels get some positive voltage, due to conducting nature of water. This voltage is then fed to their corresponding pins on controller. When level reaches to quarter level, LCD displays the messageQUARTER. On further rise of level, HALF and 3/4 QUARTER are displayed on LCD.