Instrument selection|Pressure transmitter selection Guide——Range Ability

A digital pressure transmitter is a kind of equipment used to measure, convert, and transmit pressure signals, which is widely used in industrial automation control systems. When choosing a digital pressure transmitter, we need to consider several factors, including the range, accuracy requirements, working environment, measuring media, etc. This article will provide you with a pressure transmitter selection guide to help you choose the right pressure transmitter.

The rangeability of a digital pressure transmitter refers to the range of pressure can be measured. When selecting a pressure transmitter, you need to determine the required pressure range. Taking into account the pressure changes in practical applications, it is generally recommended to choose a industrial pressure transmitter with a range slightly larger than the actual demand. If the pressure range is too small, pressure range may not meet the exact demand; If the pressure range is too large, resources may be wasted.

For small pressure measurements, such as the diaphragm pressure gauge is suitable for the pressure range from -60kpa to +60kpa, and the pressure vacuum gauge is suitable for the pressure range from -0.1MPa to +2.4MPa. In this case, will generally choose a diaphragm pressure gauge or pressure vacuum gauge.

For the measurement of general liquid and gas pressure, such as water, oil, and air pressure, ‌the commonly used range is 0~1MPa. ‌and for higher pressure liquid and gas measurement, such as steam, compressed air, and liquefied gas, the ‌range is 0~10MPa.

In a larger pressure range,‌ such as petroleum,‌ chemical industry,‌ aerospace, and other fields of pressure measurement,‌ the range can reach 0~25 MPa.‌ For higher intensity pressure measurements,‌ such as pressure vessels,‌ deep sea exploration, nuclear power plants, and other fields, the range is 0~100 MPa.

In addition, ‌there are other pressure gauges with smaller or larger ranges, ‌such as 0~ 0.6MPa, and ‌0~ 250MPa, ‌for special occasions and special pressure measurement needs.

The ranges of the industrial pressure transmitters(https://youtu.be/Mjo9f5fgh8w?si=g8SpPPGWUqBpoE6v) we produce can be measured as follows:

1A  0-124Pa~6kPa

1A  0-1kPa~62kPa

1A  0-5kPa~248kPa

1A  0-41kPa~2068kPa

1A  0-276kPa~1389kPa

1A  0-550kPa~27500kPa

The typical basic error of the digital differential pressure transmitter(https://youtu.be/DgXVSMTo1QY) is ±0.075%. Therefore, choosing the industrial pressure transmitters is very important, which ‌can’t only improve the measurement accuracy, but can also extend the service life of the instrument.