Not everyone can sense pressure well, but pressure transmitters can sense it accurately, so how does a pressure transmitter work?
When the pressure acts on the surface of the measuring diaphragm of the pressure transmitter, the diaphragm of the pressure transmitter produces a small deformation, and the high-precision circuit on the measuring diaphragm converts this small deformation into a voltage signal with high linearity proportional to the pressure and proportional to the excitation voltage, and then uses a special chip to convert the voltage signal into an output signal such as industry-standard voltage, current, and digital signal. The measuring diaphragm of the pressure transmitter is equipped with a standardized integrated circuit that contains linear and temperature compensation circuits, so it can achieve high accuracy and stability.
The working process of the pressure transmitter can be divided into the following steps:
1. The pressure sensor senses the pressure signal: when the liquid or gas is subjected to pressure, the pressure sensor will sense the pressure signal.
2. Signal conversion: The pressure sensor converts the pressure signal into an electrical signal, the piezoresistive pressure transmitter converts the pressure signal into an electrical signal through the change of resistance, and the capacitive pressure transmitter converts the pressure signal into an electrical signal through the capacitance change.
3. Signal amplification: The electrical signal after signal conversion is small and needs to be amplified for easy processing and control.
4. Calibration: The pressure transmitter needs to be calibrated to ensure that the output electrical signal is accurate.
5. Output: After signal conditioning, the pressure transmitter will output the standard electrical signal for the automatic control system to process and control.
When using a pressure transmitter, you need to pay attention to the following:
1. Installation location: The pressure transmitter should be installed on the liquid or gas pipeline to facilitate the induction of pressure signals.
2. Selection: The appropriate pressure transmitter model and specification should be selected according to the actual needs.
3. Maintenance: Regularly inspect and maintain the pressure transmitter to ensure its normal operation.
The pressure transmitter is an important measuring instrument, and its function is to convert the pressure signal into a standard electrical signal output, so that it can be easily processed and controlled in the automatic control system. Pressure transmitters work by measuring pressure using the piezoresistive or capacitive effect and converting it into an electrical signal output. When using pressure transmitters, it is necessary to pay attention to the installation location, selection and maintenance.
Pressure transmitters are used in many industries. Mechanical engineering, pipeline pressure, industrial automation, hydraulic systems, environmental protection equipment and other industries. Due to the large number of industries in which pressure transmitters are used, there are various types of pressure transmitters. A pressure transmitter that is suitable for one application is often not suitable for another, as the same pressure transmitter is often not designed to withstand the operating conditions in different applications. Explosion-proof pressure transmitters are mainly used in working conditions with explosion-proof requirements. Waterproof pressure transmitters, for example, have a high degree of protection. In the mud or construction engineering, oil extraction and other industries, the main application of impact-resistant pressure transmitters.
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