31958 switch Germany wohner model 31958 price

31958 switch is a switch that can sense temperature and convert it into a usable output signal. The temperature switch is the core part of the temperature measuring instrument, with a wide variety. According to the measurement method, it can be divided into two major categories: contact and non-contact. According to the switch material and electronic component characteristics, it is divided into two types: thermal resistance and thermocouple.

31958 switch features

Currently, baffles can be designed according to the size of the water flow to reduce the water resistance generated by the water flow passing through the flow switch, reducing the head loss of the water system. However, due to the long-term impact of the water flow on the baffle type, there is still a fatigue problem, and even if the flow value is calibrated at the factory, setpoint drift will occur. It is usually used in places where the protection flow value does not require high precision, that is, for breakflow protection when the water flow in the water pipe is suddenly interrupted. There are very few designs for water source heat pump units in China. The baffle type is specially 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. The water resistance of each baffle does not exceed 0.5 meters of water column, which is greatly reduced compared to the target type water resistance. Each baffle-type flow switch is equipped with pipe fittings identical to those of the water loop heat pump unit 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 water flow switch is greater than 25bar, making it a low-cost water 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 freezing caused by low water flow. Flow switches can also protect against heat exchanger freezing caused by decreased water flow 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 pipe, the flow switch works very stably, without floating issues similar to target flow switches. Feedback from years of use has not revealed any faults with the differential pressure switch itself.

31958 switch principle

Basic principles and types of ultrasonic flowmeters When ultrasound propagates in a flowing fluid, it carries information about the fluid velocity. Therefore, the fluid velocity can be detected by receiving the ultrasound, thereby converting it into flow rate. According to the detection method, it can be divided into different types of ultrasonic flowmeters such as propagation speed 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 flow rates. Linked with water level gauges, they can perform flow measurement of open water flows. Using ultrasonic flow measurement does not require installing measurement elements in the fluid, so it does not change the flow state of the fluid, does not generate additional resistance, and the 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 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 can 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, for other types of flowmeters, costs increase significantly as the diameter increases. Therefore, the larger the diameter, the more superior the cost-performance ratio of ultrasonic flowmeters compared to other types of flowmeters with the same function. 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.

31958 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 just used as a simple instrument in an enterprise for rough analysis, enterprise standards can be selected. If you want to purchase a flow switch, everyone must consider carefully and choose switches with guaranteed quality and good usability. Because many people think that new switches have higher technology, this is a very one-sided idea. New products must have mature technology to be good products. In many economic fields, accurate measurement of flow has become very important. Nowadays, switches are basically used to measure the amount of flow. 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. For these various types of media, several types of flow switches are universal. The first is the vortex street flow switch. Another 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 also have various measurement methods, each with its own characteristics. We should select based on factors such as the nature of the measured fluid, velocity distribution, pipeline installation location, and requirements for measurement accuracy. Due to the general difficulty in industrial flow measurement of large pipe diameters and large flows, this is because general flow switches bring manufacturing and transportation difficulties as the measurement pipe diameter increases, leading to higher costs, increased energy loss, and installation challenges. Ultrasonic flowmeters can avoid all 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 the flow measurement problems of strongly corrosive, non-conductive, radioactive, and flammable/explosive media that are difficult to measure with other types of instruments.

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