How to choose the type of Youfu pressure transmitter?

1. What kind of pressure should be measured by the transmitter.

To determine the maximum value of the measured pressure in the system, it is generally necessary to select a transmitter with a pressure range that is about twice the maximum value. This is mainly due to the fact that in many systems, especially in water pressure measurement and processing, there are peaks and continuous irregular up and down fluctuations, and this instantaneous peak can destroy the pressure sensor. Consistently high pressure values or slightly exceeding the transmitter's calibration maximum can shorten the life of the sensor, and in doing so, reduce accuracy.

A shock absorber can then be used to reduce the pressure burr, but this will reduce the response speed of the sensor. Therefore, when selecting a transmitter, it is necessary to fully consider the pressure range, accuracy and stability.

2. What kind of pressure medium.

Viscous liquids and slurries can block the pressure interface, and solvents or corrosive substances will not damage the materials in the transmitter that are in direct contact with these media. These factors will determine the choice of a direct separator and a material that is in direct contact with the medium.

Pressure Transmitter Selection Points:

1: Range, accuracy, signal output, power supply, ambient temperature, medium, explosion-proof, installation thread, etc.

2: Product selection according to the parameters of the transmitter: 1Measuring medium, 2Output signal, 3. Measurement range (range) of pressure4.Installation method 5, accuracy requirements 6, working temperature.

Parameters must be known for the selection of pressure transmitters.

Pressure transmitters are used to measure the level, density and pressure of liquids, gases or vapors, which are then converted into 4 20mA DC signal outputs. The intelligent pressure transmitter can communicate with the HART communicator and be programmed, monitored or formed into an on-site monitoring system with the host computer. There are several parameters that must be known when purchasing a pressure transmitter.

1. Wetted material.

Second, the accuracy level.

3. Range of range.

Fourth, the output signal.

5. Medium temperature.

6. Measuring medium.

When choosing a wireless pressure transmitter, you can explain it to the staff and ask for help according to the working conditions of the site.

The choice of pressure transmitter depends on the working conditions used, and you can ask for help from Youfu staff to facilitate subsequent use.

It can be used in several situations, such as the compatibility of the medium to be measured, the influence of mass temperature and ambient temperature on the product, the selection of pressure range, the selection of pressure interface, the selection of electrical interface, and the selection of pressure type.

The following parameters need to be provided for differential pressure transmitter selection:

1. Measuring range (measuring range).

2. Output signal, communication protocol, whether with display header.

3. Process interface (please provide thread specifications for ordinary ones, and provide specific flange standards, flange sizes, capillary lengths, temperature of process medium and other information for flange types).

4. Electrical interface.

5. Installation method (horizontal installation or vertical installation).

6. Mounting bracket (flat bracket or L-shaped bracket, bracket material requirements: carbon steel or stainless steel) 7. Other requirements (explosion-proof, flameproof, lightning arrester, water and oil ban treatment, etc.).

1. Absolute pressure transmitter.

Absolute pressure transmitters enable absolute pressure measurement within equipment such as degassing systems, distillation columns, evaporators and crystallizers, allowing pressures up to 10MPa. The δ chamber of the absolute pressure transmitter receives the absolute pressure signal under test on one side and encloses the other side into a high vacuum reference chamber, which is then converted into a 4 20mA DC signal output.

2. Pressure transmitter.

In general, a pressure transmitter is mainly composed of three parts: a load cell sensor (also known as a pressure sensor), a measurement circuit and a process connection. It can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into standard electrical signals (such as 4 20madc, etc.), and supply secondary instruments such as indicating alarms, recorders, and regulators for measurement, indication and process adjustment.

Both are a 4-20 mA output, both are instruments for measuring pressure, and can be displayed, output, and controlled.

The conceptual difference is that the absolute pressure transmitter measures the pressure relative to the absolute vacuum, and the pressure measured by the pressure transmitter is the pressure relative to the atmospheric pressure.

The difference in structure is reflected in the fact that there is a small hole in the sensor to balance the pressure, the small hole of the absolute pressure transmitter should be sealed, and the small hole of the pressure transmitter is open.

The correct answer is here, easy to understand pure hand-played:

Absolute pressure transmitter is a type of transmitter!

The absolute pressure of 0 is vacuum, and the pressure value displayed or output is counted as zero point of vacuum, and there are also gauge pressure and seal reference pressure!!

The gauge pressure transmitter is: the atmospheric pressure is 0, so the absolute pressure gauge is displayed or output as the local atmospheric pressure in the normal environment, and the gauge pressure transmitter is displayed as zero!

All hands played, welcome to ask!