Gauges

Pressure gauges are devices used to measure the pressure of a fluid or gas within a system. They are commonly used in various industries and applications where monitoring and controlling pressure is crucial for safety and operational purposes.

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Types of Pressure Gauges: There are several types of pressure gauges available, including:

  • Bourdon Tube Gauges: These are the most common type and work based on the deformation of a curved tube. The pressure causes the tube to straighten or curve, which is then converted into a reading on a dial.
  • Diaphragm Gauges: These gauges use a flexible diaphragm that deforms under pressure. The diaphragm movement is transmitted to a pointer, which indicates the pressure on a calibrated scale.
  • Capsule Gauges: Capsule gauges consist of two circular, flexible diaphragms welded together. The pressure difference between the inside and outside of the capsule causes it to expand or contract, leading to a pressure reading.
  • Digital Pressure Gauges: These gauges provide pressure readings in a digital format. They often have additional features such as data logging, alarms and communication interfaces.
  • Pressure Measurement Units: Pressure gauges typically measure pressure in units such as pounds per square inch (psi), kilopascals (kPa), bar, or millimeters of mercury (mmHg). The unit of measurement depends on the application and region.
  • Pressure Range and Scale: Pressure gauges are available in various pressure ranges to suit different applications. The scale on the gauge dial is calibrated to represent the pressure range accurately. It is essential to select a gauge with an appropriate range for the intended measurement to ensure accurate readings and prevent damage to the gauge.
  • Accuracy and Precision: Pressure gauges have a specified accuracy, which indicates the maximum allowable deviation from the true pressure. The precision of a gauge refers to its ability to consistently reproduce the same reading under the same conditions. The accuracy and precision of a gauge depend on its quality, calibration and design.
  • Pressure Gauge Features: Modern pressure gauges may have additional features to enhance functionality and convenience.

Some common features include:

  • Pressure Relief Valves: These valves protect the gauge from overpressure by releasing excess pressure when it exceeds a certain limit.
  • Snubbers/Dampeners: These devices help reduce the impact of pressure spikes or pulsations, preventing rapid needle movements and ensuring a smoother pressure reading.
  • Liquid Filling: Some gauges are filled with a liquid, usually glycerin or silicone oil, to dampen vibrations, reduce wear and enhance readability.
  • Electrical Output: Certain pressure gauges offer electrical outputs, such as analog signals (4-20mA) or digital interfaces (RS485, Modbus), allowing integration with control systems or data acquisition devices.

It’s important to consider the specific requirements of your application when selecting a pressure gauge, including the pressure range, fluid compatibility, environmental conditions and any necessary certifications or standards compliance.

Disclaimer: Product images are for representation purposes only. Actual part/product could differ based on individual requirements. Please contact us for more information.

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