Pressure Gauge

Display and Readout Features

• Analog Dial 

  A traditional face with a pointer that moves across a calibrated scale, with features like a mirror ring to prevent parallax error and improve reading accuracy. 

• Digital Display

  Provides fast, clear, high-accuracy readings, often with a backlight for visibility and a few digits for easy interpretation. 

• Selectable Units

  Allows users to change the displayed unit of measurement (e.g., psi, bar, kPa) to suit their needs. 

Performance and Accuracy Features

• High Accuracy

  Critical for demanding applications and master reference gauges, with performance often expressed as a percentage of the full-scale range. 

• Resolution 

  The smallest increment of pressure the gauge can display or detect. 

• Stability and Hysteresis 

  Resistance to drift over time and error when pressure is increased vs. decreased. 

• Dampening Features

  • Throttling Device: A restricting orifice installed in the socket to reduce pressure fluctuations and pulsations. 

  • Soft TP (Digital): A feature that averages multiple readings to smooth out fluctuations before refreshing the display. 

  • Liquid Filling: A liquid (like glycerin or silicone oil) filled in the gauge case to dampen vibrations and lubricate internal components. 

Connectivity and Data Features

• Data Logging: The ability to record pressure data over time for analysis. 

• Connectivity Ports: USB, RS232, or Bluetooth for connecting to computers, data loggers, or other devices. 

• Remote Monitoring: Some digital gauges allow for remote configuration and monitoring using a smartphone or tablet app. 

Construction and Durability Features

• Robust Housing 

  Often made from stainless steel to withstand harsh environments, heavy vibration, and corrosive fluids. 

• Wetted Parts 

  Materials (e.g., stainless steel) that come into contact with the process fluid, chosen for compatibility. 

• Blowout Plug 

  A safety feature on the back of the gauge that acts as a pressure relief mechanism in case of an internal failure. 

Advanced Features

• Maximum/Minimum Pointers

  An indicator that stays at the highest or lowest pressure reached during operation. 

• Electric Contacts

  Allow the gauge to trigger alarms, signal lights, or operate pumps and valves when pressure reaches a specific point. 

• Calibration Certificates

  For critical applications, gauges must have a recent calibration and a proper certificate.