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Sensor classification 1, water flow transmitter The water flow sensor is mainly composed of copper valve body, flow rotor assembly, steady flow assembly and Hall element. It is fitted to the inlet end of the water heater to measure the inflow rate. As water flows through the rotor assembly, the magnetic rotor rotates and the speed varies linearly with the flow rate. Hall element output corresponding pulse signal feedback to the controller, by the controller to judge the size of water flow, adjust the current control proportional valve, so as to control the gas volume through the proportional valve, avoid the phenomenon of warm summer and cool winter gas water heater in the process of use. The water flow sensor fundamentally solves the disadvantages of high starting water pressure of differential pressure water-gas linkage valve and dry burning of flap type water valve. It has the advantages of sensitive response, long life, quick action, safe and reliable, easy connection and low flow ... Continue reading →

Verification regulation and flow meter standard are the guarantee that flow sensor can measure accurately. Accurate measurement of flow is very important in many fields and is widely used in economic fields, such as environmental monitoring, medical and health care, safety protection and trade settlement. According to the structure of the flow transmitter can be divided into blade (wing) type, quantity core type, hot wire type, hot film type, Carmen vortex type and so on. According to its standard properties to classify, can be divided into the following categories. Method standard: some sensor calculation method, detection method, test method and performance evaluation method and so on; Basic standards: basic parameters, models, nomenclature and terminology of some sensor specifications; Product standard: This type of sensor has been included in kuaiyi, which specifies the technical requirements of the sensor, acceptance rules, test methods and product classification, in addition to ... Continue reading →

Positive displacement flow meter uses a fixed small volume to repeatedly measure the volume of fluid passing through a flowmeter. Therefore, there must be a standard volume of space inside the positive displacement flowmeter, which is usually called the "metering space" or "metering room" of the positive displacement flow meter. This space consists of the inner wall of the meter housing and the rotating parts of the meter. The working principle of the positive displacement flowmeter is: when the fluid passes through the flowmeter, there will be a certain pressure difference between the inlet and outlet of the flowmeter. The rotating part of the flow meter (rotor for short) rotates under this pressure difference and pushes the fluid from the inlet to the outlet. In this process, the fluid repeatedly fills the "metering space" of the flowmeter, and then is continuously sent to the outlet. For a given flowmeter, the volume of the metering space is determined ... Continue reading →