Abstract: Factors such as higher product quality, less waste, reduced cost, reliability etc can be achieved in any liquid/chemical process industries by improving its accuracy to measure its level. Because of the emerging sophisticated and tight process control systems, there arises a need for a reliable and precise level measurement system. A new technique to measure the liquid level in industries is employed using fuzzy inference engine in MATLAB using the Multi sensor data fusion concept. This is done by forming the membership functions for every sensor used in the multi sensor environment. This system is validated using the ultrasonic sensor and the capacitor level sensor.

Keywords: Fuzzy inference engine, Multi sensor data fusion, Membership functions.