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microsonic switches are devices or assemblies that sense pressure signals and convert them into usable output electrical signals according to a defined pattern. Pressure switches typically consist of a pressure-sensitive element and a signal processing unit. Depending on the type of test pressure, pressure switches can be classified as gauge pressure switches, differential pressure switches, and absolute pressure switches. Pressure switches are among the most commonly used switches in industrial practice and are widely applied in various industrial automation environments, including water conservancy and hydropower, railway transportation, smart buildings, production automation, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines, and many other industries.

microsonic switch features

Currently, baffles can be designed according to the water flow rate to reduce the water resistance generated when water flows through the flow switch, thereby reducing head loss in the water system. However, baffles subjected to long-term water flow impact still suffer from fatigue issues, and setpoint drift may occur even if the flow value is calibrated at the factory. They are typically used where precise protection of flow values is not required, i.e., for break-flow protection against sudden interruption of water flow in pipes. There are very few designs in China specifically for water-source heat pump units. The baffle type is specifically developed for water flow monitoring in water-loop/ground-source heat pump air conditioning units. It is equipped with different baffles for different pipe diameters, and the water resistance of each baffle does not exceed 0.5 meters of water column, which is significantly lower than that of paddle-type switches. Each baffle-type flow switch is fitted with pipe fittings identical to those of the water-loop heat pump unit's water pipes. Only connection to the water pipe is required on-site, without any modification to the baffle. In addition, the pressure rating of the baffle-type water flow switch is greater than 25bar, making it a low-cost water flow switch for water-loop heat pump units with non-critical water flow requirements. Feedback from use on water-loop/ground-source heat pump units shows that differential pressure switches can effectively identify problems in the on-site installation of water piping for water-loop heat pump units, completely avoiding heat exchanger freeze-up due to low water flow. Flow switches can also protect against heat exchanger freeze-up caused by reduced water flow due to clogged water filters. Furthermore, water pipe differential pressure switches do not carry the risk of fatigue failure associated with paddle flow switches. Especially when there is a small amount of air in the water piping, the flow switch operates very stably without the floating issues seen in paddle flow switches. Feedback from years of use has revealed no failures of the differential pressure switch itself.

microsonic switch principle

Basic principles and types of ultrasonic flowmeters: When ultrasonic waves propagate in a flowing fluid, they carry information about the fluid's flow velocity. Therefore, the fluid's flow velocity can be detected by receiving the ultrasonic waves, and thus converted into flow rate. Depending on the detection method, ultrasonic flowmeters can be classified into different types such as transit-time difference method, Doppler method, beam deflection method, noise method, and correlation method. Ultrasonic flowmeters are non-contact instruments that have only come into application in the last decade or so with the rapid development of integrated circuit technology. They are suitable for measuring fluids that are difficult to contact and observe, as well as large-diameter pipe flows. Linked with level gauges, they can measure flow in open channels. Using ultrasonic flow measurement eliminates the need to install measuring elements in the fluid, so it does not change the fluid's flow state, produces no additional resistance, and installation and maintenance of the instrument do not affect the operation of the production pipeline, making it an ideal energy-saving flowmeter. Industrial flow measurement commonly faces difficulties in measuring large pipe diameters and high flow rates. This is because general flowmeters incur manufacturing and transportation difficulties, increased costs, and higher energy losses as the measurement pipe diameter increases. Ultrasonic flowmeters avoid these disadvantages. Since all types of ultrasonic flowmeters can be installed externally for non-contact flow measurement, the instrument cost is basically independent of the measured pipe diameter. In contrast, the cost of other types of flowmeters increases substantially with diameter. Therefore, the larger the diameter, the more superior the cost-performance ratio of ultrasonic flowmeters compared to other types with similar functions. They are considered excellent instruments for large-diameter flow measurement. Doppler method ultrasonic flowmeters can measure the flow of two-phase media, so they can be used for measuring dirty flows such as sewers and sewage. In power plants.

microsonic switch selection

When selecting a flow switch, users should choose a suitable switch based on their own needs. Many users have different requirements for the switches they use, so the selected standards also vary. If professional data and results are required, national standards should be selected. However, if it is only for a rough analysis as a simple instrument within an enterprise, enterprise standards can be selected. If you intend to purchase a flow switch, please consider carefully and choose switches with guaranteed quality and good usability. Because many people assume that new switches have higher technology, this is a very one-sided view. New products must possess mature technology to be good products. In many economic sectors, accurate flow measurement has become very important. Nowadays, switches are basically used to measure flow quantities. The switch senses the fluid flow and converts it into a usable output signal. Installing a switch makes operation simpler and more convenient. The quantity of flowing objects passing through per unit time is called flow rate, and there are different flow switches for different objects, often distinguished by the measured medium and the measurement method. Flow switches are generally used for the flow of media fluids in industrial pipelines. Generally, there are various media such as gas, liquid, and steam, and several types of flow switches can be universal for these various media. The first type is the vortex flow switch. Another type is the ultrasonic flow switch. With the development of ultrasonic technology, ultrasonic flow switches can generally measure the flow of most flowing objects. Ultrasonic flow switches have various measurement methods, each with its own characteristics. We should select based on factors such as the properties of the measured fluid, flow velocity distribution, pipeline installation location, and accuracy requirements. Since industrial flow measurement commonly faces difficulties in measuring large pipe diameters and high flow rates, this is because general flow switches incur manufacturing and transportation difficulties, increased costs, and higher energy losses as the measurement pipe diameter increases. Ultrasonic flowmeters avoid these disadvantages. The flow measurement accuracy of ultrasonic flow switches is hardly affected by parameters such as the temperature, pressure, viscosity, and density of the measured fluid. They can also be made into non-contact and portable measuring instruments, thus solving flow measurement problems for highly corrosive, non-conductive, radioactive, and flammable/explosive media that are difficult to measure with other types of instruments.

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