The gauge pressure sensor is an instrument that measures the pressure of a gas or liquid relative to atmospheric pressure. This type of sensor is commonly used to monitor and control pressure in industrial processes in the oil & gas, chemical, power generation and water treatment industries.
BrochureDownload the brochure and find out how to improve your measurement accuracy with Fuji Electric's relative pressure transmitters .
The FKG and FKP high-precision relative pressure transmitters are capable of accurately determining gauge pressure, then sending a corresponding 4-20 mA electrical output signal.
The gauge pressure transmitter uses the most advanced digital signal processing and a silicon micro-capacitive sensor for unrivalled precision, stability and reliability.
The gauge pressure transmitter measures the process pressure of a gas, steam or liquid in relation to atmospheric pressure. The pressure transmitter is installed on a pipe to measure pressure, or on a tank to measure level by hydrostatic pressure.
The gauge pressure sensor comprises a single pressure port to be connected to the process on which pressure is to be measured. This HP high-pressure port is connected to a metal diaphragm.
The low-pressure BP 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 system's capacitance value. This value is then converted into an analog 4-20 mA and digital HART signal in accordance with the measured gauge pressure .
The gauge pressure sensor is less expensive than an absolutepressure transmitter .
The digital gauge pressure sensor has a wider measuring range than its absolute pressure transmitter counterpart. These pressure measurement devices can measure higher pressures.
Not only is the gauge pressure sensor exceptionally precise and accurate, it is also highly reliable and offers great long-term stability.
High repeatability
Long-term stability
Relative pressure transmitters have limitations in terms of accuracy compared with absolute pressure transmitters .
This limitation is due to their dependence on atmospheric pressure.
However, a gauge pressure sensor may be sufficient and an affordable solution for most industrial processes.
The standard unit of measurement for gauge pressure is the pascal (Pa).
In most industrial applications, other units such as bar (100,000 pascals (Pa)), pound-force per square inch (psi) (6,894 pascals (Pa)) are used.
The gauge pressure sensor can measure pressures ranging from a few mbar to several bars.
Maximum operating pressure and permissible overpressure vary according to cell range and transmitter model.
This measuring instrument can measure pressure relative to atmospheric pressure as high as 500 bar with excellent accuracy and stability.
The gauge pressure sensor is used in industry to measure the pressure of any liquid, gas or pressurized fluid.
Pressure measurement in chemical reactors, tanks and storage containers, pressure control in chemical transfer systems.
Food industry:
Pressure monitoring in food processing and packaging systems, pressure control in pasteurization systems.
Metal industry :
Pressure measurement in high-temperature furnaces, pressure monitoring in melt transfer systems, for example.
Pressure monitoring in oil and gas transport and storage systems, pressure control in oil and gas drilling and production equipment.
Pressure verification in manufacturing and materials processing.
Pressure monitoring in fluid transport systems. Pressure measurement in air and gas distribution systems.
Measurement of pressure in the primary cooling loop, pressure in the steam generator, in storage tanks to monitor gas pressure. These nuclear sensors have special features to ensure safe operation.
