Pressure transmitter is a common industrial sensor widely used in automation control systems of various industries. Its main function is to convert pressure signals into standard electrical signals for accurate measurement and monitoring of pressure parameters. This article will briefly analyze the working principle of pressure transmitters and their importance in application fields.
The working principle of pressure transmitters is based on the piezoresistive effect or piezoelectric effect. Taking the piezoresistive pressure transmitter as an example, it contains a metal thin film strain gauge and a bridge circuit inside. When subjected to external pressure, metal thin film strain gauges will deform, resulting in a change in resistance value. Through the measurement of the bridge circuit, this change can be converted into a corresponding electrical signal output. In this way, the pressure transmitter can convert pressure information into standard current signals (such as 4-20mA) or voltage signals (such as 0-10V) for use in the control system.
The application fields of pressure transmitters are very wide. Firstly, in industrial automation systems, pressure transmitters are widely used in the field of pressure measurement and control, such as liquid level measurement, flow monitoring, compressor control, etc. By accurately measuring and monitoring pressure parameters in various fluid systems, efficient operation and safe control of the system can be achieved.
Secondly, pressure transmitters also play an important role in industries such as petrochemicals, food processing, and pharmaceutical manufacturing. In the petrochemical industry, pressure transmitters are commonly used for pipeline pressure detection, tank level monitoring, and other processes to ensure the stability and safety of system operation. In the food processing process, pressure transmitters can be used to monitor filling pressure and pressure changes during the brewing process to ensure product quality and production efficiency.
In addition, pressure transmitters are widely used in the energy industry, water treatment industry, aerospace and other fields. In the energy industry, pressure transmitters are used for pressure monitoring of gas pipelines to ensure the safety of gas supply. In the water treatment industry, pressure transmitters can be used to monitor pressure changes in pump stations and water tanks to achieve rational utilization of water resources. In the aerospace field, pressure transmitters are widely used for pressure monitoring and control of aircraft engines.
In summary, pressure transmitters play an important role in industrial automation control systems due to their reliable pressure measurement and conversion functions. Whether in industrial production, petrochemicals, food processing, or other industries, pressure transmitters can provide reliable support for the safe operation and efficient control of various fluid systems. With the advancement of technology and the continuous expansion of application demands, the application fields of pressure transmitters will become broader, and new types of pressure transmitters with higher precision and multifunctionality may emerge.