A Comprehensive Guide to Pressure Gauge Types

UN manomètre is a device used to measure the pressure of gases or liquids within a system. Pressure gauges are critical in many industries, from manufacturing and HVAC to oil and gas, chemicals, and pharmaceuticals. They come in a variety of types and designs, each suited to different applications, environments, and measurement requirements. This comprehensive guide outlines the different types of common pressure gauges, their applications and unique features.

1. Mechanical Pressure Gauges
Mechanical pressure gauges operate without electricity and are based on the physical movement of components such as diaphragms, bourdon tubes, and pistons in response to pressure changes.

 

a. Bourdon Tube Pressure Gauge
Features:
Commonly used for industrial applications pressure gauges.
Can measure both low and high pressures.
Available in various sizes and ranges.
Suitable for a wide range of substances.
Applications: Water treatment, HVAC, oil and gas, petrochemical industries.

 

b. Diaphragm Pressure Gauge
Features:
Ideal for measuring low to medium pressures.
Can be used for both gaseous and liquid media.
Often used for viscous, corrosive, or high-temperature applications when combined with a protective casing.
Applications: Steam systems, hydraulic systems, and systems with corrosive media.

 

c. Piston (or Capsule) Pressure Gauge
Features:
Accurate for low-pressure applications.
Common in applications with pressurized air or non-viscous fluids.
Relatively compact and inexpensive.
Applications: Pneumatic systems, pressure monitoring in low-pressure applications.

 

2. Digital Electronic Pressure Gauge
Features:
High precision and accuracy.
Often include features like programmable alarms, data logging, and remote communication capabilities.
Can measure absolute, gauge, or differential pressure.
Applications: Laboratory equipment, testing and calibration, research, and specialized industrial processes.

 

3. Differential Pressure Gauges
Differential pressure gauges measure the difference in pressure between two points in a system.
Features:
Offers precise pressure difference readings.
Can be used with liquids or gases.
Often has dual pointers or digital displays for easy reading.
Applications: HVAC systems, filtration monitoring, pump performance, flow measurement systems.

 

4. Absolute Pressure Gauges
Absolute pressure measurement gauges measure pressure relative to a perfect vacuum (0 Pa or 0 psi). These gauges are used when it's necessary to measure the absolute pressure in a system, regardless of atmospheric pressure variations.
Features:
Often used in scientific and precise industrial applications.
Requires a sealed chamber or reference vacuum inside the gauge.
Applications: Vacuum chambers, scientific research, and calibration labs.

 

5. Vacuum Pressure Gauges
Vacuum gauges measure pressures lower than atmospheric pressure (i.e., in a vacuum or sub-atmospheric environments).
Features:
Can be used for both high and ultra-high vacuum systems.
Available in analog or digital models.
Applications: Semiconductor manufacturing, laboratory research, vacuum pumps, and systems.

 

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