In the past, the use of magnesium alloy die castings was relatively small, and now it is slowly increasing. Because magnesium alloys have the characteristics of low density and strong rigidity, many parts of shells and brackets use magnesium die castings. For example, the fast-developing mobile phones and notebook computers in recent years often use magnesium die casting for the support frame and the back shell. However, compared with aluminum alloy die casting and zinc alloy die casting, the cost of magnesium alloy die-casting will be relatively high.
The melting point of magnesium alloy is relatively low, and it needs effective gas protection during die casting, which is easy to oxidize and burn. Therefore, the professionalism of die casting is relatively strong, and the requirements for die casting personnel are generally relatively high. SCZY has professional and technical personnel for die-casting magnesium alloy products to ensure the quality of the products. Including one-stop services such as precision CNC machining and surface treatment provided later.
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It is understood that with the social progress and economic development, pressure transmitters have been used more and more. What is the working principle of pressure transmitter?
The pressure transmitter is composed of three major categories to provide indications, indications, and adjustments such as indicator alarms, recorders, and conditioners.
The pressure transmitter is used to measure the level, density, and pressure of liquids, gases, or vapors, and then converted to a 4-20 mA signal output.
Differential pressure transmitter, also known as differential pressure transmitter, is mainly composed of load cell sensor, module circuit, display meter, case and process connector. It can convert the received gas, liquid and other pressure difference signals into standard current and voltage signals, and provide secondary instruments such as alarm indicators, recorders, and regulators for measurement, indication and process adjustment.
Differential pressure transmitter measurement principle is: the process pressure and reference pressure acting on the two sides of the integrated silicon pressure sensitive element, the differential pressure deformation of the wafer (displacement is very small, only μm level), so that the use of silicon The fully dynamic Wheatstone bridge made of semiconductor technology outputs an mV-level voltage signal proportional to pressure driven by an external current source. Since the silicon material has excellent strength, the linearity and variation index of the output signal are both high. At work, the pressure transmitter converts the measured physical quantity into a mV-level voltage signal and sends it to a differential amplifier that has a very high amplification and cancels temperature drift. The amplified signal is converted into a corresponding current signal by voltage-current conversion, and then subjected to a non-linear correction. Finally, a standard current-voltage signal having a linear relationship with the input pressure is generated.
Differential pressure transmitters can be divided into two types, general pressure transmitters (0.001MPa to 20MPA) and differential pressure transmitters (0 to 30kPa), depending on the pressure measurement range. 