In the field of industrial instruments, pressure measurement plays a crucial role in ensuring the safety, efficiency, and performance of various processes. The core of this measurement is a pressure transmitter - a complex device that converts mechanical pressure into electrical signals.
What is a pressure transmitter?
Pressure transmitter is a device for measuring fluid or gas pressure. It achieves this by converting pressure measurement values into easily recorded signals. Pressure transmitters can be used for various applications, from measuring water pressure to industrial process pressure.
Pressure transmitter is a complex instrument composed of several important components:
Sensing element: The core of a pressure transmitter is a sensing element, usually a diaphragm or piezoelectric crystal, which responds to pressure changes.
Sensor: The sensing element converts mechanical pressure into proportional electrical signals, usually voltage or current.
Signal conditioning: Then adjust, amplify, and calibrate the original electrical signal to ensure accuracy and compatibility with the control system.
Output interface: The final calibrated signal is sent to the output interface, which can be analog (4-20 mA, 0-10 V) or digital (HART, Profibus, etc.).
Housing and protection: Pressure transmitters are packaged in sturdy housings and are typically designed to withstand harsh environments, temperature fluctuations, and chemical exposure.
How does a pressure transmitter work?
The pressure transmitter uses a diaphragm to measure pressure. This diaphragm is filled with fluid that is sensitive to pressure changes. The diaphragm is connected to the strain gauge. When the fluid pressure in the diaphragm changes, the strain gauge detects the change and sends an output signal. The output signal is then sent to the display or controller.
Type of pressure transmitter
The most common types include differential pressure transmitters, gauge pressure transmitters, and absolute pressure transmitters.
The differential pressure transmitter measures the pressure difference between two points. This type of pressure transmitter is typically used to measure the pressure drop in filters or processes.
The gauge pressure transmitter measures the difference between atmospheric pressure and the given fluid pressure. This type of pressure transmitter is typically used in applications that require pressure measurement relative to atmospheric pressure.
An absolute pressure transmitter measures the absolute pressure of a given fluid. When it is necessary to track or monitor the absolute pressure of a given fluid, use this type of pressure transmitter.
Pressure transmitters are used in various industries, and each type of transmitter fully utilizes its accuracy and reliability:
Manufacturing: In industrial processes, pressure transmitters monitor and control pressure levels in hydraulic systems, pneumatic systems, and fluid dynamics.
Oil and natural gas: In exploration, refining, and distribution, pressure transmitters play a crucial role in maintaining the safety and efficiency of pipelines, tanks, and containers.
Aerospace: From aircraft engines to cabin pressure monitoring, pressure transmitters ensure aviation safety and performance.
Healthcare: Accurate pressure measurement is crucial in medical equipment such as ventilators and sphygmomanometers.
Automotive: Pressure transmitters monitor tire pressure, fuel system, and hydraulic components to achieve optimal vehicle performance.
Installation and calibration
The pressure transmitter needs to be installed correctly. When selecting the appropriate product for the task, it is necessary to consider the location of the pressure transmitter. All connections must be secure to minimize any potential leakage.
Calibration is also required when installing pressure transmitters. This is to ensure that the transmitter produces accurate readings. The calibration process must be completed by experienced technicians using suitable calibration instruments.
The ability of pressure transmitters to convert pressure changes into actionable data demonstrates their importance in modern industry and technological progress.
CSPPM specialized in manufacturing and selling pressure sensors, pressure transmitters, liquid level sensor, temperature transmitter, automation instrument and system. Based on Central South University (CSU), implemented the quality management system of ISO9001. declared several of national invention patents etc.