DESIGN AND DEVELOPMENT OF A SIMPLE AND COST-EFFECTIVE EMBEDDED LIQUID LEVEL MEASUREMENT SYSTEM

Аннотация

Measuring the level of liquids or solids is a crucial process in various processing industries. This article presents the design of a capacitive transducer using a 555-timer circuit to measure capacitance based on frequency, connected to a microcontroller to provide an accurate level measurement system. The entire system was tested and calibrated with a standard measuring tank (5–95%). This system determines loading and unloading error percentages, as well as hysteresis error, and observes the maximum range corresponding to the variation. The measurement quality of the system was further improved through linearization and result analysis.