Oil-water interface instrument classification

　　First, float type oil-water interface instrument

　　Float type oil-water interface instrument is a common oil-water interface measuring equipment. It uses Archimedes' principle to determine the height of the oil-water interface by floating floats of a specific density in the middle of the oil-water interface. This instrument combines magnetostriction technology to realize the remote transmission of signals. The float type oil-water interface instrument has the characteristics of simple structure and convenient operation, and is suitable for the measurement of various oil-water mixtures.

　　2. Radar/ultrasonic oil-water interface instrument

　　The radar/ultrasonic oil-water interface instrument uses the frequency difference principle and the composite pulse radar technology to transmit and receive the modulated pulse signal, and compares the received signal with the pulse signal reflected back from the measured medium surface, so as to calculate the measured distance and get the surface position of the measured object. This instrument has the characteristics of high precision and high reliability, and is especially suitable for the occasions where the measurement accuracy is required. However, it should be noted that temperature and humidity will affect the speed of ultrasonic propagation, causing errors and reducing measurement accuracy.

　　Three, RF admittance type oil-water interface instrument

　　Based on the RF impedance theory, the oil-water interface instrument can reflect the position of oil-water interface by the impedance characteristic of the measured medium. This instrument uses the very different dielectric constants of oil and water to distinguish the fuzzy interface, including the emulsion layer. The RF admittance oil-water interface instrument has the characteristics of accurate measurement and rapid response, and is suitable for all kinds of complex oil-water mixture environment.

　　Fourth, short-wave absorption oil-water interface instrument

　　The short-wave absorption oil-water interface instrument analyzes the water content according to the different absorption characteristics of short-wave in oil-water medium. The oil-water interface detection method has high sensitivity and accuracy by using the difference of electrical conductivity and dielectric constant between crude oil and water. This instrument is easy to install and maintain, can run continuously online, and work stably and reliably. However, its detection range is relatively small, and the linearity of the detection signal may be poor.

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