As an important measuring instrument, electrical pressure gauge is widely used in various industrial fields to monitor and display the pressure change in fluid system in real time. Through electrical signal conversion and transmission, it realizes remote monitoring and automatic control of pressure, and greatly improves the efficiency and safety of industrial production. So, how does the electrical pressure gauge work?

The basic composition of the electrical pressure gauge

The electrical pressure gauge usually consists of pressure sensor, signal processing circuit, display device and necessary power supply and connecting cable. Among them, the pressure sensor is the core component of the electrical pressure gauge, responsible for the fluid system to convert the pressure into electrical signals; The signal processing circuit amplifies, filters and linearizes the electrical signal of the sensor to get the accurate and stable pressure value, and the display device is used to display the pressure value intuitively, it is easy for the operator to read; the power supply provides the necessary power for the whole system.

The working principle of the electrical pressure gauge

The working principle of the electrical pressure gauge can be summarized as the following steps:

Pressure sensing: when the pressure in the fluid system changes, the pressure sensor internal sensitive elements (such as strain gages, piezoresistive elements, etc.) will be affected by the force and deformation. This deformation will cause the resistance value of the sensitive element to change, thus output an electrical signal with a certain relationship to the pressure.

Signal Processing: after receiving the electrical signal from the sensor, the signal processing circuit will amplify and filter it to eliminate noise and interference and improve the accuracy and stability of the signal. At the same time, the signal processing circuit will also carry on the linearization processing to the signal, makes the output signal and the pressure value present the linear relation, facilitates the subsequent calculation and the display.

Analog-to-digital conversion and display: after processing the electrical signal will be converted into digital signal, and through the microprocessor and other devices for further processing and calculation. Finally, the calculated pressure values are transmitted to the display device, which is visually displayed in the form of a digital or analog pointer.

Remote monitoring and automatic control: in addition to local display, the pressure gauge can also be transmitted to the remote monitoring system through communication interface (such as RS485, Modbus, etc.) . In this way, the operator can know the pressure condition of the fluid system in the control room in real time, and carry out automatic control as needed.

Application fields of electrical pressure gauge

Electrical pressure gauge is widely used in petroleum, chemical, electric power, metallurgy, machinery and other industrial fields because of its high precision, high stability, easy remote monitoring and automatic control. For example, in oil production, an electrical pressure gauge can be used to monitor pressure changes in an oil well; in chemical production, it can be used to control the pressure of a reactor; in power systems, it can be used to monitor the transmission line insulation pressure.

Summary

As an important measuring instrument, the electrical pressure gauge realizes remote monitoring and automatic control of pressure through electrical signal conversion and transmission. Its working principle is based on pressure sensing, signal processing, analog-to-digital conversion and display, remote monitoring and automatic control. The electrical pressure gauge has the widespread application prospect and the important value in the industrial production. With the development of science and technology, the performance of electrical pressure gauge will be improved continuously, providing more powerful support for the automation and intelligence of industrial production.