German Meggitt sensor Meggitt model Meggitt price

Meggitt sensor is a device capable of sensing the approach of an object. It utilizes the sensitivity of a displacement sensor to approaching objects to detect proximity and output corresponding switching signals; therefore, proximity sensors are often referred to as proximity switches. It is a general term for sensors designed to replace contact-based detection methods such as switches, with the aim of detecting without contacting the target object. It can detect movement and presence information of the object and convert it into electrical signals.

Meggitt sensor features

Currently, baffles can be designed according to the water flow rate to reduce the water resistance generated by water flowing through the flow sensor, thereby reducing head loss in the water system. However, due to long-term impact from water flow, baffle-type sensors still suffer from fatigue issues, and setpoint drift may occur even if the flow value was calibrated at the factory. They are typically used in applications where precise protection of flow values is not required, specifically 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 target-type sensors. Each baffle-type flow sensor is equipped with pipe fittings identical to those of the water-loop heat pump unit's water pipes. On-site installation only requires connecting to the water pipe without any modification to the baffle. Additionally, 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 indicates that differential pressure switches can effectively identify problems with on-site installed water piping of water-loop heat pump units, thoroughly avoiding heat exchanger freeze-up caused by low water flow. Flow sensors can also protect against heat exchanger freeze-up due to reduced water flow caused by clogged water filters. Furthermore, water pipe differential pressure switches do not carry the risk of fatigue failure associated with target flow switches. Especially when there is a small amount of air in the water piping, the flow sensor operates very stably without floating issues similar to those seen in target flow switches. Feedback from years of use has not revealed any faults with the differential pressure switch itself.

Meggitt sensor principle

Basic principles and types of ultrasonic flowmeters: When ultrasound propagates through a flowing fluid, it carries information about the fluid's flow velocity. Therefore, by receiving the ultrasonic waves, the fluid's flow velocity can be detected and converted into flow rate. Based 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 come into application only 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. When linked with level gauges, they can measure open-channel flow. Using ultrasonic flow measurement eliminates the need to install measuring elements in the fluid, thus not altering the fluid's flow state or generating additional resistance. Instrument installation and maintenance do not affect production pipeline operation, making it an ideal energy-saving flowmeter. Industrial flow measurement commonly faces difficulties with 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 various 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, for larger diameters, ultrasonic flowmeters offer a better cost-performance ratio than other types with similar functions. They are considered superior instruments for large-diameter flow measurement. Doppler method ultrasonic flowmeters can measure two-phase media flow, making them suitable for measuring dirty flows such as sewage and drainage. In power plants.

Meggitt sensor selection

When selecting flow sensors, users should choose suitable sensors based on their own needs. Many users have different requirements for the sensors they use, so the selected standards vary. If professional data and results are required, national standards should be selected. However, if the sensor is only used as a simple instrument within an enterprise for rough analysis, enterprise standards can be selected. When purchasing flow sensors, careful consideration is essential, and one should choose sensors with guaranteed quality and good usability. Many people assume that new sensors have higher technology levels, which is a one-sided view. New products must possess mature technology to be considered good products. In many economic sectors, accurate flow measurement has become very important. Nowadays, sensors are basically used to measure flow quantities. Sensors sense fluid flow and convert it into usable output signals; installing sensors makes operation simpler and more convenient. The quantity of flowing objects passing through per unit time is called flow rate. Different flow sensors are used for different objects, and flow sensor types are often distinguished by the measured medium and measurement method. Flow sensors are generally used for the flow of media fluids in industrial pipelines. Under normal circumstances, there are various media such as gas, liquid, and steam. Several types of flow sensors can be universal for these various media types. The first is the vortex flow sensor. Another type is the ultrasonic flow sensor. With the development of ultrasonic technology, ultrasonic flow sensors can generally measure the flow of most flowing objects. Ultrasonic flow sensors 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. Due to the common difficulties in industrial flow measurement regarding large pipe diameters and high flow rates—where general flow sensors face 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 sensors is hardly affected by parameters such as 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 strongly corrosive, non-conductive, radioactive, and flammable/explosive media that are difficult to measure with other types of instruments.

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