Pressure Measurement and Calibration Services

 

Accurate calibration for pressure gauges, meters, digital gauges, test gauges, switches, vacuum gauges, and air pressure instruments in Dubai, UAE.

Pressure Measurement and Calibration Services

Pressure calibration is the fundamental process of verifying and adjusting the accuracy of a Pressure Instrument or Pressure Meter against a known, traceable standard.¹ This is critical for operational safety, quality control, and regulatory compliance across industries like oil & gas, manufacturing, pharmaceuticals, and more.²

Key Pressure Calibration Terminology and Devices

The calibration process applies to a wide range of devices, each serving a specific function:

• Pressure Gauge Calibration: This is the most common service, verifying the accuracy of standard mechanical (analog, often using a Bourdon tube) gauges. The calibration procedure involves comparing the gauge's reading to a higher-accuracy reference at several points across its full range.³
• Digital Pressure Gauge Calibration: These electronic instruments use pressure transducers to display readings digitally.⁴ Calibration often involves software-assisted verification and adjustment of the sensor and electronics.⁵ Digital gauges generally offer higher accuracy (e.g., ⁶$\pm 0.05\%$ to ⁷$\pm 0.1\%$ of full scale) than their analog counterparts.⁸
• Test Gauge Calibration: Test gauges are high-precision pressure gauges (both analog and digital) used as secondary standards for checking other instruments. Due to their role as a reference, their calibration requires a higher level of accuracy, often involving more test points (up to 10 points) and a stringent calibration standard, typically using a Dead Weight Tester or a highly accurate Air Pressure Calibrator as the primary standard.
• Vacuum Gauge Calibration: This is specialized calibration for instruments that measure pressures below the ambient atmospheric pressure (i.e., vacuum).⁹ The procedure requires specialized vacuum pumps and reference gauges to verify accuracy in negative pressure ranges.
• Pressure Switch Calibration: This is a safety-critical service.¹⁰ A pressure switch does not measure pressure across a range but rather triggers an action (like shutting down a pump or opening a valve) when a specific set-point pressure is reached. Calibration ensures the switch accurately and reliably trips at the designated pressure thresholds.¹¹

The Calibration Process and Standards

Pressure Gauge Calibration Services follow a detailed procedure to ensure accuracy and traceability:

1. Preparation and Inspection: The instrument is inspected for damage and cleaned.¹² For analog gauges, they are typically "exercised" (pressurized to full range multiple times) to minimize mechanical hysteresis.¹³
2. Comparison to a Standard: The instrument under test is connected to a stable pressure source (pneumatic or hydraulic) along with a Pressure Gauge Calibration Standard (a reference instrument like a Dead Weight Tester or a high-accuracy digital calibrator).¹⁴
3. Applying Pressure: Pressure is applied incrementally at multiple test points (e.g., 5 points at 20%, 40%, 60%, 80%, and 100% of the range). Readings are typically taken for both increasing and decreasing pressure (hysteresis check).¹⁵
4. Adjustment and Verification: Any discrepancies found (errors) are noted.¹⁶ If the instrument can be adjusted (e.g., with a zero screw on an analog gauge or software in a digital one), adjustments are made, and the calibration is re-verified.
5. Certification: A calibration certificate is issued, detailing the "As Found" and "As Left" readings, the uncertainty of measurement, and the traceability of the standard used to national or international metrology institutes.¹⁷

Reputable calibration labs are typically accredited to ISO/IEC 17025, which validates their competence to perform these specialized Pressure Measurement And Calibration tasks.¹⁸ Calibration frequency (often annually) depends on the instrument's usage, environment, and required accuracy.¹⁹