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What to consider when choosing a pressure measuring instrument
Here’s how Fagerberg improves the everyday for the process industry.
Which pressure measuring instrument is right for your process? This depends on the type of pressure you need to measure, the properties of the medium and your measurement requirements.
Here, we guide you through the key factors to consider and provide an overview of different types of pressure instruments and where they are best suited.
1. Start with your measurement needs
Do you need to measure pressure continuously, read it locally or monitor when it reaches a certain level? Pressure transmitters are used for continuous measurement and signal transmission, pressure gauges provide local readings, and pressure switches are used for applications such as alarms and control.
2. What type of pressure do you need to measure?
Gauge pressure, absolute pressure and differential pressure are three common measurement types. Gauge pressure is measured relative to atmospheric pressure, absolute pressure relative to a vacuum, and differential pressure as the difference between two pressure points. The choice depends on how the measurement will be used.
3. Consider your process conditions
Measuring range, operating pressure, temperature and the properties of the medium all influence the choice of pressure instrument. Pressure fluctuations, pulsations and temporary pressure peaks also need to be considered to ensure reliable performance over time.
4. How accurate does your measurement need to be?
Requirements vary depending on whether the measurement is used for basic pressure monitoring, process control or accurate differential pressure measurement. The measuring range, accuracy and long-term stability of the instrument should therefore be matched to how the measurement will be used.
5. Consider installation and process conditions
High temperatures, corrosive or viscous media and strong pressure pulsations may require specific materials and instrument designs. Diaphragm seals, capillaries and valve manifolds can simplify installation and help protect the instrument in demanding applications.
6. Which type of pressure instrument is right for your application?
A brief overview of our different product categories.
Pressure transmitters
Continuously measure pressure and convert the measured value into an electrical signal for monitoring and control. Available for gauge, absolute and differential pressure measurement, with designs suited to different process conditions.
Pressure switches
Monitor when pressure reaches a set limit and are used for alarms, pump control and equipment protection. Available in both mechanical and electronic versions.
Pressure gauges
Provide a local pressure reading directly at the process. Available in different measuring ranges and designs, including liquid-filled models for applications involving vibration and pressure pulsations.
Pressure measurement accessories
Diaphragm seals, valve manifolds and process connections help adapt the instrument to the installation. They can be used to protect measuring instruments, allow isolation from the process and simplify maintenance.
The most suitable solution depends on your measurement needs, process conditions and installation requirements.