How often should pressure gauges be calibrated?

Most pressure gauges should be calibrated at least once every 12 months. Instruments used in high-cycle production, safety-critical process control, or after any overpressure event or physical shock should be recalibrated more frequently to stay within tolerance and maintain ASME B40.100 compliance.

Pressure Calibration Services

ISO/IEC 17025 Accredited, NIST-Traceable Pressure Calibration

We offer pressure calibration that is backed by a documented ISO/IEC 17025:2017 scope and full measurement uncertainty analysis. Our accredited pressure calibration certificates carry traceability to national standards through NIST and are accepted for IATF 16949, ISO 13485, and AS9100 quality system audits. When accuracy is non-negotiable, accreditation is your proof.

What is pressure calibration?

Pressure calibration is the process of comparing a pressure instrument’s output reading against a certified reference standard under controlled conditions and adjusting it so its readings stay within a defined tolerance. Accredited pressure calibration confirms that a gauge, transducer, transmitter, or switch reports the correct pressure, with results traceable to national standards through NIST.

Where Accurate Pressure Calibration Matters

Inaccurate pressure readings cause overpressure events, product defects, and safety incidents. Regular pressure calibration keeps critical systems within specification.

Aerospace and Defense

Hydraulic systems, pneumatic actuators, fuel systems, and altimeters depend on exact pressure readings. Calibrated pressure gauges and transducers ensure flight-critical systems meet specification, supporting AS9100 traceability requirements.

Oil, Gas, and Process

Pipeline transmitters, wellhead gauges, and process control loops rely on accurate pressure measurement to prevent overpressure events and maintain safe, compliant operations.

Medical Devices

Ventilators, infusion pumps, and sterilization equipment require validated pressure readings. Accredited pressure calibration supports ISO 13485 documentation and patient-safety compliance.

Industrial Manufacturing

Compressors, pneumatic tooling, and hydraulic presses depend on calibrated pressure gauges and switches to maintain product quality and equipment safety on the production floor.

Pressure Instruments We Calibrate

Pressure Gauges

dial (analog), digital, and differential pressure gauge calibration

Pressure Transducers

gauge, absolute, differential, and sealed transducer calibration for test and process applications

Pressure Transmitters

process-line and field-mounted transmitter calibration for control loops

Pressure Calibrators

handheld and bench-top pressure calibrator verification and calibration

Pressure Switches

set-point verification and calibration for process and safety switches

Deadweight Testers

primary standard calibration for high-accuracy pressure references

How Our Service Works

How Our Pressure Calibration Process Works

We handle every test instrument with the utmost care, following a meticulous inspection and precision calibration process to ensure accurate, reliable, and traceable results.

Receive & Inspect

Incoming pressure instruments are logged, inspected for damage, and matched to their calibration history.

Calibrate

Instruments are calibrated across multiple pressure set points against traceable reference standards.

Documenting & Reporting

We record all test results, calibration adjustments, and measurement data, then generate a NIST-traceable calibration certificate with a detailed report on the data.

Return

Instruments are returned on your schedule, with lab, on-site, and expedited turnaround options available.

Features

Possibility of performing all types of earth measurements with a single instrument.
Earth measurements on pylons with protective earth cable connected.
Measurement of HF-earth resistance.
Measurement of earthing impedance with simulation of a 10/350 µs lightning strike impulse.
Analysis of earth impedance as a function of the frequency due to a wide measurement frequency band (55 Hz … 15 kHz).
Sweep mode Z(f) with graphical presentation of the results.
Measurement of earth potential and step and contact voltages.
Checkbox: different self-check methods.
Measurement of earth resistance (2 / 3 / 4–pole).
Measurement of selective earth resistance (1 x clamp).
Measurement of earth resistance (2 x iron clamps).
Measurement of specific earth resistance (Wenner and Schlumberger method).
Measurement of HF-earth resistance (25 kHz).
Measurement of earth resistance of mono pylons with 10 m flex clamp.
Measurement of earth resistance of multi–leg pylons with up to four flex clamps.
Measurement of earth potential.
Measurement of step and contact voltages.
Impulse Earth measurement 10/350 µs.
Measurement of DC resistance.
Built-in help screens for referencing on site.
Support for AUTO SEQUENCE®s and visual tests for advanced users.
Bluetooth communication with PC, Android tablets and smart phones.

Applications

Power generation.
Using disconnected transmission lines in measurements.
Renewable power plants.
Hydroelectric power.
Photovoltaic installations.
Wind power generation.
Power distribution.
Earthing resistance of pylons.
Remote antenna tower earthing resistance.
Specific earth resistance measurement methods.
Earthing measurement with fall of potential method.
Hospital earthing measurement with fall of potential method.

Pressure Calibration Service Levels Offered

Type of Service	Traceable	Traceable with Data	Accredited (ISO:IEC 17025:2017, Z540.3)
Calibrated to manufacturers specifications traceable to SI Units
ISO 9000 Compliant
Calibration certificates, data, maintained on secure web based tool (CDM)
Detailed calibration certificates and calibration stickers
Instrument adjustment (if found out of tolerance)
ANSI/NCSL Z540-1 compliant
Calibration Data
Logo from Accreditation body, Expanded Measurement Uncertainty
ANSI/NCSL Z540.3 compliant

Frequently Asked Questions

How often should a torque wrench be calibrated?

A torque wrench should be calibrated at least once every 12 months, or after roughly 5,000 cycles — whichever comes first. Tools used in high-volume production, safety-critical assembly, or after any drop or overload should be recalibrated more frequently to stay within tolerance and maintain ISO 6789 compliance.

Do you provide accredited torque calibration certificates?

Yes. Micro Precision issues ISO/IEC 17025:2017 accredited calibration certificates with full measurement uncertainty statements and documented NIST traceability, accepted for IATF 16949, ISO 13485, and AS9100 quality system audits.

Can you calibrate pressure transducers and transmitters?

Yes. Our pressure calibration services cover pressure transducers, transmitters, switches, calibrators, and deadweight testers across a broad measurement range, from vacuum through high-pressure applications.

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