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Does the type of Engineering Units matter for Pressure Transmitters

When selecting a part number for a pressure transmitter you will need to choose a pressure range. Usually a manufacturer will designate pressure ranges in the most common unit used by it’s customers.

For the USA the most common unit is psi and for Europe it is bar, but what if you are working with other units such as kPa or inHg, is it possible to use a pressure transmitter scaled in bar or psi for other types of unit?

All pressure units are linearly proportional to each other, so if the pressure range is doubled it will also be doubled in whatever units are chosen for conversion.

Pressure transmitter products
  • ATM/T Pressure and Temperature Dual Output Transmitter
  • TPHADA Ultra High Range Pressure Sensor TPHADA Ultra High Range Pressure Sensor
  • DMP331 Precision Pressure Transmitter
  • TPFADA Flush Diaphragm Pressure Transmitter TPFADA Flush Diaphragm Pressure Transmitter

Request info on pressure transmitter products for your application.

A pressure transmitter has an electrical output measured in milliamps typically over a range of 4 to 20mA. If the range is 0 to 100 bar, the output will be 4mA at 0 bar and 20mA at 100 bar. Since pressure is read in milliamps it can be converted into any unit using the appropriate bar conversion factor. So a 100 bar pressure transmitter could also be used as a 0-1450 psi, 0-2950 inHg or 0-1020 mH20 as well.

In summary the type of pressure unit specified on a pressure transmitter marking label or data sheet is for reference purposes only and does not restrict it’s use with other engineerings units as long as the correct conversion factor is applied.

Pressure transmitter products
  • ATEX Approved Pressure Transmitters
  • Chemical Resistant Pressure Sensor Elements for Electronic Devices & Embedded Product Design & Development
  • Pressure Indicator Transmitters
  • DMP331 Precision Pressure Transmitter

Request info on pressure transmitter products for your application.

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Measure & Log Pressure On Your Computer

Measure and record pressure in bar, mbar, psi, MPa, Pa, mH2O, mmHg, atm or kg/cm2 using this USB pressure sensor and logging kit with your computer
Measure and record pressure in bar, mbar, psi, MPa, Pa, mH2O, mmHg, atm or kg/cm2 using this USB Pressure Sensor and Logging Kit with your computer

Pressure Sensor Specifier

Specify a pressure sensor
Select your pressure sensor requirements

Product Selection Guides

  • Differential Pressure Sensors
  • Digital Pressure Gauges
  • Digital Pressure Sensors
  • Digital Readouts
  • Hydrostatic Liquid Level Sensors
  • Millivolt Output Pressure Transducers
  • Pressure Transducers
  • Pressure Transmitters
  • Voltage Output Pressure Transducers

Application Selection Guides

  • Absolute Pressure
  • Dual Temperature and Pressure
  • Flush Diaphragm
  • High Frequency Response
  • Leak Testing
  • Low Pressure Range
  • Oxygen Service
  • Submersible
  • Vacuum

Help Guides

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  • Measuring vacuum with negative gauge or absolute ranges
  • Measuring the difference in air pressure between rooms
  • What does negative and positive gauge pressure mean
  • Measuring the Pressure of Hot Media
  • Determining water tank volume using hydrostatic pressure
  • How to get a 10 volt signal from a 4-20mA output pressure sensor

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