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LEMART sensor pressure sensor for level measurement. The static pressure submersible level transmitter (level gauge) is based on the principle that the static pressure of the measured liquid is proportional to the height of the liquid. It uses advanced foreign isolated diffused silicon sensitive elements or ceramic capacitive pressure sensitive sensors to convert static pressure into electrical signals, which are then converted into standard electrical signals (generally 4～20mA/15VDC) after temperature compensation and linear correction.

LEMART sensor features

Currently, baffles can be designed according to the water flow rate to reduce the water resistance generated by the water flow passing through the flow sensor, reducing the head loss of the water system. However, due to long-term impact from water flow, the baffle type still has fatigue issues, and setpoint drift may occur even if the flow value is calibrated at the factory. It is usually used where precise protection of flow values is not required, i.e., for break-flow protection against sudden interruption of water flow in pipes. In China, very few are designed specifically for water source heat pump units. The baffle type is specifically developed for water flow monitoring of 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 water resistance. Each baffle-type flow sensor is equipped 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 changes to the baffle. In addition, the pressure bearing capacity of the baffle-type flow switch is greater than 25bar, making it a low-cost flow switch for water-loop heat pump units with low water flow requirements. Feedback from use on water-loop/ground-source heat pump units shows that differential pressure switches can effectively identify problems with the water piping installed on-site for water-loop heat pump units, completely avoiding heat exchanger freeze-up caused by low water flow. Flow sensors can also protect against heat exchanger freeze-up when water flow decreases due to clogged water filters. Additionally, 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 pipes, the flow sensor works very stably without floating issues similar to those of target flow switches. Feedback from years of use has not revealed any faults with the differential pressure switch itself.

LEMART sensor 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, thereby converting it into flow rate. According to the detection method, ultrasonic flowmeters can be divided into different types such as propagation time difference method, Doppler method, beam deflection method, noise method, and correlation method. Ultrasonic flowmeters are a type of non-contact instrument that has only begun to be applied in the last ten years 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 open water flow. Using ultrasonic flow measurement does not require installing measurement 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 production pipelines, making it an ideal energy-saving flowmeter. Industrial flow measurement generally faces difficulties in measuring large pipe diameters and large flows. This is because general flowmeters bring manufacturing and transportation difficulties as the measurement pipe diameter increases, leading to higher costs, increased energy loss, and installation challenges. Ultrasonic flowmeters avoid all these disadvantages. Because various types of ultrasonic flowmeters can be installed outside the pipe for non-contact flow measurement, the instrument cost is basically unrelated to the size of the measured pipe diameter. In contrast, the cost of other types of flowmeters increases substantially as the diameter increases. 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 better 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.

LEMART sensor selection

When selecting flow sensors, users should choose suitable sensors according to their own needs. Many users have different requirements for the sensors they use, so the standards selected vary. If professional data and results are required, national standards should be selected. However, if it is just for simple analysis as an instrument within an enterprise, enterprise standards can be selected. If you want to purchase flow sensors, everyone must consider carefully and choose sensors with guaranteed quality and good usability. Because many people think that new sensors have higher technology, this is a very one-sided idea. New products must possess mature technology to be good products. In many economic sectors, accurate measurement of flow has become very important. Nowadays, sensors are basically used to measure the amount of flow. 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, and different flow sensors are used for different objects, 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 types of media. The first is the vortex flow sensor. Another 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 also have various measurement methods, each with its own characteristics. We should select based on factors such as the nature of the measured fluid, flow velocity distribution, pipeline installation location, and requirements for measurement accuracy. Since industrial flow measurement generally faces difficulties in measuring large pipe diameters and large flows—because general flow sensors bring manufacturing and transportation difficulties as the measurement pipe diameter increases, leading to higher costs, increased energy loss, and installation challenges—ultrasonic flowmeters avoid all these disadvantages. The flow measurement accuracy of ultrasonic flow sensors 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 strongly corrosive, non-conductive, radioactive, and flammable/explosive media that are difficult for other types of instruments to measure.

Weidou Intelligent Technology professionally sells German LEMART sensors, LEMART proximity sensors, LEMART distance sensors, LEMART vision sensors, LEMART displacement sensors, LEMART load cells, LEMART speed sensors, LEMART photoelectric sensors, LEMART position sensors, LEMART angle sensors, LEMART tactile sensors, LEMART temperature sensors, LEMART pressure sensors, LEMART flow sensors, LEMART level sensors, LEMART motion sensors, LEMART process sensors. Original imports from Germany. Welcome customers to inquire and order.