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An ultrasonic level gauge is a digital level measuring instrument controlled by a microprocessor. During measurement, pulsed ultrasonic waves are emitted by a sensor (transducer); the sound waves are reflected off the surface of the object and then received by the same sensor, where they are converted into electrical signals. The distance from the sensor to the object being measured is calculated based on the time between the emission and reception of sound waves. Analysis of external ultrasonic level gauges: Due to their contactless measurement method, there are almost no restrictions on the medium being measured, allowing them to be widely used for measuring the height of various liquids and solid materials. Ultrasonic level gauge – Measurement principle and applications Measurement principle The principle of an ultrasonic level gauge is to measure the time required for an ultrasonic pulse to travel from emission to return. An ultrasonic level gauge is installed vertically on the surface of the liquid; it emits an ultrasonic pulse toward the liquid surface. After a certain period of time, the sensor of the ultrasonic level gauge receives the signal reflected back from the liquid surface. This signal is processed by the transmitter circuit, and based on the time difference between the emission and reception of the ultrasonic waves, the distance from the liquid surface to the sensor is calculated. Composition: The components of an ultrasonic level gauge include an ultrasonic transducer, a processing unit, and an output unit. Applications: Ultrasonic level gauges are an excellent measuring tool for use with corrosive fluids, fluids with sediment layers, or wastewater containing acids and alkalis. The media that can be measured by ultrasonic level gauges include industrial chemicals such as hydrochloric acid, sulfuric acid, hydroxides, wastewater, resins, paraffin, sludge, alkalis, and bleach, and they are widely used in industries such as water treatment, chemicals, power generation, metallurgy, petroleum, and semiconductors. http://www.dhechina.com