Gauge pressure transmitter

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Gauge pressure transmitters are measurement devices that measure the pressure of a gas or liquid relative to atmospheric pressure. They are commonly used to monitor and control pressure in industrial processes in the oil and gas industry, chemical industry, power generation and water treatment.



Benefits of the FCX Relative Pressure Transmitter

The FKG and FKP models of high precision relative pressure sensors are capable of accurately determining relative pressure and then sending a corresponding 4-20 mA electrical output signal.

The transmitter uses the most advanced digital signal processing and a silicon micro-capacitive sensor for unmatched accuracy, stability and reliability.

  • Precise measurement of relative pressure
  • Independent of environmental conditions thanks to GyrationTM 4D characterisation
  • Reliable, robust with high availability.



Technical advantages

Technical advantages

  1. High precision and reliability
  2. Design for minimum stock
  3. Minimal environmental influence
  4. HART communication protocols
  5. Application flexibility
  6. Programmable output and linearisation function
  7. Long-term stability
  8. Version available with diaphragm seal for extreme temperatures from -90 °C to +400 °CHaute précision et fiabilité


What is the principle of the gauge pressure sensor?

The gauge pressure transmitters measure the process pressure of a gas, steam or liquid in relation to the atmospheric pressure.
The pressure sensor is installed on a pipe or vessel to measure the pressure.

How does the gauge pressure transmitter work?

The relative pressure transducer has a single pressure port to be connected to the process on which pressure is to be measured. This high pressure port HP is connected to a metal membrane.

How does the gauge pressure transmitter workThe low pressure side of the sensor is subject to atmospheric pressure.

The metal diaphragm deforms proportionally and transmits the measured applied pressure via an internal fluid to the micro-capacitive measuring element.

The pressure exerted on this capacitive electronic component will deform it. This deformation changes the capacitance value of the system.

This value is then converted into an analogue and digital signal in accordance with the measured relative pressure.

What are the advantages of the gauge pressure transmitter?

Gauge pressure transmitters are cheaper than absolute pressure transmitters.
Digital gauge pressure transmitters have wider measuring ranges than their absolute pressure counterparts. These devices can measure higher pressures. They are reliable, accurate, easy to use and easy to install.

Not only do these transmitters have exceptional precision and accuracy, but they are very reliable and have long-term stability.

high repeatability and long term stability

What are the disadvantages of the gauge pressure transmitters?

What are the disadvantages of the gauge pressure transmittersThe gauge pressure sensors have limitations in terms of accuracy compared to absolute pressure sensors.

This limitation is due to their dependence on atmospheric pressure.

However, a relative pressure transducer can be sufficient and an affordable solution for most industrial applications.

What is the unit of relative pressure?

The unit of measurement for relative pressure is the pascal (Pa). In industrial applications, other units such as bar (100,000 pascals (Pa)), pound-force per square inch (psi) (6,894 pascals (Pa)) are often used.

What are the pressure ranges of the gauge pressure transmitters?

What are the pressure ranges of the gauge pressure transmitters

The gauge pressure sensors can measure pressures ranging from a few mbar to several bars.

The maximum operating pressures they can measure vary.

These devices can measure pressures as high as 500 bar with excellent accuracy and stability.

What are the areas of application of gauge pressure sensors?

Gauge pressure transmitters are used in industry to measure the pressure of any gas or fluid under pressure.

What are the areas of application of gauge pressure sensorsChemical industry: Pressure measurement in chemical reactors, tanks and storage vessels, pressure monitoring in chemical transfer systems.
Food industry: Pressure monitoring in food processing and packaging systems, pressure monitoring in pasteurisation systems.
Metal industry: Pressure measurement in high temperature furnaces, pressure monitoring in melt transfer systems.
Oil and gas industry: Pressure monitoring in oil and gas transport and storage systems, pressure monitoring in oil and gas drilling and production equipment.
Cement industry: Pressure monitoring in material manufacturing and processing.
Thermal energy: Pressure monitoring in fluid transport systems. Pressure measurement in air and gas distribution systems.
Nuclear industry: Pressure measurement in the primary cooling loop, pressure in the steam generator, pressure in storage tanks to monitor gas pressure. These pressure transmitter for nuclear application have special features to ensure safe operation.


Gauge pressure transmitter documentation