Basic characteristics of intelligent pressure transmitter

From the current use situation of intelligent pressure transmitter, the utilization rate of foreign pressure transmitter is much higher than that of domestic pressure transmitter, which is closely related to the fact that everyone does not understand the basic characteristics of domestic pressure transmitter. Let's give you a detailed introduction:

1. Compact design, integrated junction box and zero and range adjustment of this machine simplify installation, calibration and operation.

2. The shell is a flameproof, weatherproof, two-room structure with separated circuit board and wiring. Most models can provide 316L SST, Hastelloy C, Monel, gold-plated Monel or tantalum materials for corrosive occasions. Modular structure and plug-in circuit board are helpful for troubleshooting and reducing spare parts inventory.

3. Intelligent pressure transmitter can accurately measure flow, gauge pressure, liquid level, absolute pressure, vacuum degree and specific gravity. The direct electronic sensor with fully sealed d- cell capacitance sensor has greatly improved the pressure measurement and achieved good stability. The stress isolation ring welded on the sensor shell can prevent the error caused by the stress and torque on the process flange and minimize the influence of static pressure and overpressure.

What methods are there to reduce the measurement error of pressure transmitter?

The pressure guide pipe connects the transmitter with the process pipeline and transmits the pressure at the pressure tap on the process pipeline to the transmitter. In the process of pressure transmission, the possible causes of errors are as follows:

1) leakage;

2) Wear loss (especially for cleaning agents); 　

3) There is gas in the liquid pipeline (causing head error); 　　

4) Liquid exists in the gas pipeline (causing head error); 　　

5) The density between the pressure guide pipes on both sides is different due to the temperature difference (causing head error). 　

The methods to reduce the error are as follows:

1) The pressure guide pipe should be as short as possible;

2) When measuring liquid or steam, the pressure guide pipe flows upward to the process pipeline, and its inclination should be not less than 1/12;

3) For gas measurement, the pressure guide pipe is connected down to the process pipeline, and its inclination should be no less than 1/12;

4) The layout of liquid pressure conducting pipes should avoid high points in the middle, and the layout of gas pressure conducting pipes should avoid low points in the middle;

5) Keep the same temperature between the two pressure pipes;

6) In order to avoid the influence of friction, the diameter of the pressure guide pipe should be large enough;

7) There should be no gas in the pressure guide pipe filled with liquid;

8) When isolating liquid is used, the liquid in the pressure guide pipes on both sides should be the same;

9) When cleaning agent is used, the joint of cleaning agent should be close to the pressure tap of process pipeline, and the pipeline that the cleaning agent passes through should have the same length and diameter, and the cleaning agent should be prevented from passing through the transmitter.

Link-B2B is a professional supplier listing service platform which will provide high quality and trustworthy supplier list to international buyers. If you are looking for pressure transmitter suppliers, feel free to visit Link-B2B.com and send a request.