Differential pressure transmitter is a widely used measuring instrument in the industrial field.
1. Definition and working principle
Differential pressure transmitter is a type of transmitter used to measure the differential pressure value when a fluid or gas flows. Its working principle is to measure the pressure difference between the media on both sides, convert the pressure difference into an electrical signal (usually a standard signal of 4-20mA), and output it to achieve the measurement of differential pressure. The differential pressure transmitter is equipped with two bellows inside, which are connected to the pressure port and the positive pressure port respectively. When subjected to different pressures, the bellows produce symmetrical displacement, which is then converted into a standard signal output by a closed-loop control system.
2. Composition structure
Differential pressure transmitters usually consist of three parts: pressure sensors, signal processing circuits, and output devices. Among them, the pressure sensor is the core component, and the negative blue converts the differential pressure signal into an electrical signal; The signal processing circuit amplifies, filters, and processes the signal output by the sensor; The output device outputs the processed signal in standard form.
3. Application scenarios
Differential pressure transmitters have a wide range of applications in multiple industrial fields.
① Petrochemical industry: In equipment such as gas pressure regulating stations, ethylene plants, heat exchangers, and desulfurization towers, differential pressure transmitters can monitor pressure changes in pipelines in real time, ensuring the stability and safety of the production process.
② Electricity: commonly used for combustion process control of equipment such as boilers and steam turbine units. By monitoring and adjusting differential pressure, it ensures that the mixing ratio of oxygen and fuel in the combustion system is appropriate, improving equipment efficiency and operational safety
③ Metallurgy: In equipment such as blast furnace gas systems, sintering machine flue gas systems, and wet dust collectors, differential pressure transmitters can monitor and control the pressure difference in related systems in real time, maintaining the balanced operation of the system.
④ Water treatment: In the control of sedimentation, filtration, and disinfection processes in sewage treatment plants, differential pressure transmitters can monitor pressure changes in relevant equipment in real time and automatically adjust according to the changes to ensure the smooth progress of the water treatment process.
4. Performance characteristics
① Accurate measurement: Differential pressure transmitters have high measurement accuracy and adjustable range, which can meet the needs of different measurement environments.
② Stable performance: Made with advanced production technology and high-quality materials, it has a long service life and high pressure and temperature resistance.
③ Standard signal output: Output a unified standard signal (such as 4-20mA) for easy connection and communication with other instruments and equipment.
④ Remote control: Supports digital signal transmission methods such as HART protocol, enabling remote monitoring and control functions.
In summary, differential pressure transmitter is a powerful and widely used industrial measuring instrument. It can accurately and quickly measure the pressure difference of fluids, provide important data support for production processes in various industries, and promote the improvement of equipment operation efficiency and safety.
Our main products include electromagnetic flowmeter, turbine flowmeter,mass flowmeter, vortex street flowmeter, pressure transmitter, liquid level transmitter, and magnetic level indicator.
