Analogue Pressure Gauge Calibration

Why Choose Our Analogue Pressure Gauge Calibration Service

Industry Leaders Nationwide for Analogue Pressure Gauge Calibration Services

Zedflo has been a market leader in test and measurement equipment since 1982. In 2014 we established a service and repair laboratory, and in 2018 achieved NATA accreditation for compliance with ISO/IEC 17025—Calibration. Our quality and customer service policies focus on providing the very best service.

Zedflo proudly offers calibration services with uncertainty of measurement capabilities among the best in Australia. We have invested in high-performance equipment across our laboratory.
We constantly strive to give the best customer service, which clients have come to expect over our 40+ year history in test and measurement.

Our NATA accreditation is an independent testament to our attention to detail, commitment to working to international standards in quality and technical management and metrological traceability.

Calibration services
Calibration services

Our Accreditation

  • NATA Accredited Laboratory operating in accordance with ISO/IEC 17025
  • Authorised Metrel Service and Calibration Centre
  • Authorised Additel Service and Calibration Centre

In house repair service

  • OEM backed and authorised service and repair agents for many instruments in our range.
  • That means less downtime in the event a fault or issue is found.


  • Our NATA accreditation scope has some of the best uncertainties in Australia.
  • Advice you can rely on, with 40+ years experience in the industry.

Fast & Easy

  • Standard turn around under 1 week.
  • Expediting options available (as quick as same business day).
  • Express freight options at great rates.

Why Calibrate?

The successful operation of any process depends on the accuracy of each instrument in the control loop. It is essential that sensors in a system are properly calibrated for the entire loop perform reliably. This requires suitable calibration methods to be used, trained personnel, and metrological traceability being maintained. Choosing the right calibration laboratory can be as important for lifetime accuracy and reliability of an instrument as selecting the right equipment in the first place.

Accredited Calibration:
Accredited calibration helps you objectively understand an instrument’s performance, while giving you peace of mind that the results can be trusted.

Zedflo’s NATA accredited services include:

  • A calibration certificate, bearing the NATA emblem
  • Reporting of results, both prior to and following adjustment if required
  • Free instrument adjustment to improve performance where possible
  • Method selection and statement of compliance following strict criteria

More Info On Analogue Pressure Gauge Calibration

Understanding the Need for Precision – Why Calibration Matters

In the world of pressure measurement, accuracy is not just a preference; it’s a necessity. Calibrating an analogue pressure gauge ensures that your measurements are precise, reliable, and in line with industry standards. This practice is essential for maintaining safety, efficiency and reliability in operations where pressure monitoring is critical.

View our full accredited scope on the NATA website:

A basic summary of our NATA accredited scope:


We can calibrate virtually all pressure reading devices

  • Up to 415MPa / 60,000PSI
  • 0.009% Uncertainty capable for precision devices up to 105MPa (15,000PSI)
  • Excellent low pressure capability – 0.65Pa uncertainty on draught pressures
  • Barometers and absolute pressure transmitters with current, voltage or frequency outputs


DMMs, Meters, Calibrators

  • DC Voltage up to 1050V, from 5ppm uncertainty
  • DC Current up to 30A, from 20ppm uncertainty
  • AC Voltage and Current 10Hz to 100 kHz, from 0.02%
  • Resistance up to 10 GΩ, Capacitance up to 200 mF

HV Insulation and Continuity

  • Insulation Resistance up to 10GΩ, 10kV test voltage
  • MicroOhm Continuity from as low as 1μΩ at 100A test current

Frequency and Time

  • Frequency calibration up to 100 MHz on counters, meters, calibrators or testers.  From 5 μHz uncertainty
  • RCD Testers, trip time uncertainty from 0.3ms

Resistor Sets and Decade Boxes

  • Standard Resistors, Calibration Boxes,
    Insulation Test Boxes, Decade Boxes etc…
    From 10 μΩ to 10 GΩ
  • NATA Accredited Laboratory operating in accordance with ISO/IEC 17025
  • Authorised, OEM backed services
  • Fair and affordable rates
  • 120 day after repair warranty (terms and conditions apply)
  • Fast standard turnaround times, typically under 1 week
  • Expedited service options for same or next day turn around
  • Guarantee to offer professional, impartial advice for your repair or calibration with 40+ years experience in the industry

We have a few options you can choose from:

Complete one of the options from ‘How to organize a calibration?’

You can send us your instrument, or drop it into us during business hours

If urgent, let us know and we can offer an expedited service for an additional fee

Once the instrument arrives we will send you a formal quotation for your approval. (or seek approval in person)

You can contact us at any time for a status update

After your approval we will perform the quoted works.

Standard turn around is 1 week.

This will vary with work loads but we are often faster than that, calibrations are typically worked on in order of receival/approval

When completed we will send you an invoice for payment.

If you are on a ‘30 day trade account’ then we will process as per your PO or agreement.

After payment is cleared (or PO is processed for account customers), we will inform you that the goods can be collected, or if you have opted for shipping we will typically dispatch same or next business day.

You can also pay in store at time of collection.

Normal business hours

Monday to Friday, 8am to 4:30pm

We are closed on public holidays

Accepted payment methods
  • Direct bank transfer
  • Card payment over the phone (Mastercard & Visa only)
  • Eftpos payment in store (Mastercard & Visa only)

We typically have a standardized pricing structure for calibrations

  • Most of the time we can provide a quote/estimate even without seeing the instrument in person.
  • Some instruments may require an inspection prior to formally quoting
  • Be aware a quote is only an estimate, the quote may need a variance after we have inspected or even begun the calibration procedure, for example if we find damage or faults with the instrument that were not expected and not within the initial scope of the job.
  • We will contact you with a revised quote before proceeding further where necessary.

We have a minimum fee of $80 +GST, this applies as a minimum inspection fee and also a minimum calibration attempt fee for any instrument processed through our facility.

  • Instruments that fail a calibration are generally still chargeable up to the full quoted price, we may at our discretion charge a lesser fee depending how much time and effort was spent working on the instrument.
  • For failed instruments if possible we may be able to offer a repair or replacement
  • Some instruments may carry a larger minimum fee, for example in cases where we need to send the instrument to a 3rd party for assessment, in these cases before moving forward we will quote an elevated minimum fee to cover the associated freight costs and 3rd party assessment fees.

Typical internal flow of a calibration

Typically, the whole calibration process is completed within 1 week.

  • This does vary and depends on various factors, but more often than not we are actually quicker.
  • Your instrument will go through various stages during a typical calibration, we are efficient at moving it between various stages in the process but sometimes delays can happen, we will inform you if we expect any kind of delay.
  • Some calibrations may be sent to a 3rd party partner or supplier, in which case they will carry a longer than our standard turnaround time. We do, however, strive to provide the very best and accurate estimate of turnaround time at time of quoting.

For expedited ‘same day’ or ‘next day’ service, Zedflo is the best calibration service to look to!

We are always busy and do have a constant stream of work in our laboratory, instruments are usually worked on in the order they are received, and then in order of confirmed approval to proceed with quote, but for a fee your instrument can jump the queue when you require a fast turn around.

The fee will vary, and is subject to availability, but as a typical guide:

  • Next business day turn around add 30% to the normal fee
  • Same day (next on bench) turn around add 50% to the normal fee

Contact us today for more information about how we can help you with your instrument calibration needs.


Analogue Pressure Gauge
Digital Pressure Gauges
Pressure Transmitters & Transducers
Pressure Calibrators
Pressure Switch Setting


Clamp Meters
Installation Testers
RCD Testers
Insulation Testers
Loop Impedance
Earth Testers
Process Calibrators
Loop Calibrators

Turn around:

We know rapid turn around is important, we endeavour to repair or calibrate your equipment as quickly as possible, we advise a typical lead time of 7 days but we can often turn around calibrations next business day depending on our work load.

Other Calibrations:

We can calibrate various other instruments too, it doesn’t have to be Metrel or Additel – below is a current list of products we are capable of calibrating, if you have something not on this list, please make an enquiry.

Bench testing an analogue gauge is a precise process aimed at ensuring the gauge’s accuracy and reliability. Below is a step-by-step guide on this procedure:



Before testing, clean the gauge thoroughly to ensure that no dirt or debris interferes with its operation or your reference equipment.


Check the gauge for any signs of damage or wear. Any defects could affect the accuracy of the test.

Reference Equipment

Ensure all necessary testing equipment is available, functional and is within its required calibration interval. This includes a reference gauge/module, a pressure source, any required connectors or adapters, and finally ensure access to any applicable calibration standard you may be required to follow (e.g. MSA Test Method 2).

Environmental Conditions

Take note of environmental conditions (temperature, gauge positioning etc.) to report these along with the results as ‘test conditions’.


Securing the Gauge

Attach the gauge securely to the test bench. This involves making sure that all connections are tight and leak-free, ensuring safety.

Setting up Test Equipment

Connect the gauge to the standard pressure source. Ensure that all connections between the gauge, the pressure source, and the reference gauge are secure and correctly configured.


Running the Test

Apply pressure from the standard source to the gauge being tested. Monitor the gauge’s response and compare its readings to that of the reference gauge.

Observing Responses

Pay attention to how the gauge reacts to changes in pressure. Note the speed of response and any lag in the readings.


Recording Results (Error)

Document any differences (gauge error) between the gauge’s readings and the reference gauge’s. Note the conditions under which these differences occur.

Evaluating Acceptability

Assess whether the variances are within acceptable limits for the gauge’s intended use. This may involve the use of a calibration standard (e.g. MSA Test Method 2).

Maintaining Records

Keep a detailed record of the test results for future reference and quality control purposes.

Case and Ring

This part of the pressure gauge is the protective shield, safeguarding the internal components from external elements like dust, moisture, and mechanical impact.

The case is typically made from robust materials like stainless steel or plastic, and it houses all the internal parts of the gauge. The ring is usually a circular component that secures the face or the glass of the gauge, adding an extra layer of protection and often enhancing the aesthetic appeal of the device.

Dial and Pointer

The dial and pointer are the most visible parts of a pressure gauge and are collectively known as the face of the gauge. The dial usually features numerical markings indicating pressure levels, and it may have different scales depending on the type of pressure being measured (e.g., psi, bar, kPa). The pointer, which is a thin, needle component, moves over the dial to indicate the current pressure reading. The clarity and precision of the dial and pointer are crucial to ensure accurate measurements.

Bourdon Tube

Is a curved, flexible tube that changes shape in response to the fluid or gas pressure inside, resulting in the movement of the pointer, and thus the indicated pressure on the face of the gauge.


A critical component that translates the mechanical motion of the Bourdon tube into a readable indication on the dial.

This mechanism typically involves a series of gears and linkages that amplify the small movements of the Bourdon tube into a larger, more discernible motion of the pointer across the dial. 

When choosing between digital and mechanical pressure gauges, it’s essential to consider the specific requirements of your application, including factors like precision, durability, environmental conditions, and budget. 

Digital Pressure Gauges

High Precision

A digital pressure gauge is known for its higher precision and accurate measurements. They often feature advanced sensors that provide exact measurements, which can be crucial in applications where precise pressure monitoring is necessary.

Easy to Read

These gauges typically have a clear digital display, often an LCD, which shows the pressure gauge reading in an easy-to-read format. This can be particularly advantageous in low-light conditions or where quick, unambiguous readings are required.

Cost Considerations

Generally, digital gauges are more expensive than their mechanical counterparts. This is due to their more complex technology and additional features. The cost might be a significant factor, especially for large-scale deployments or where budget constraints are tight.

Mechanical Gauges


Mechanical gauges are typically more robust and better suited for tough conditions. They are less sensitive to dust and moisture, making them ideal for industrial environments or outdoor applications.

No Power Requirement

These gauges operate purely mechanically and do not require any power source. This makes them more suitable for use in remote or off-grid locations.

Maintenance and Attention

Mechanical gauges might require more frequent calibration and maintenance to ensure accuracy. They are also more prone to wear and tear due to their moving parts.

All services including repairs and calibrations are subject to our standard terms and conditions

Get in touch with us for your next process calibration

Our comprehensive calibration services are indispensable for any industry seeking precision, safety, and compliance. Book your calibration today!

By offering a diverse range of calibration types, we cater to the unique needs of various measurement instruments. If you have equipment that needs calibration that we have not outlined above, please contact us for further information.

Our meticulous process calibration ensures the accuracy and consistency of your equipment, enhancing overall industrial operations. With our expert team and advanced methods, we align measurements with standards and elevate the quality and reliability of production processes. With our team and process, you can feel confident that your equipment will work more accurately and efficiently than ever before. Contact us to see what we can do for you.

Trust us to be your partner in maintaining the highest measurement accuracy and operational excellence standards. Contact us at Zedflo today for your next calibration.

Contact Us

Get in contact with us today to see how we can help. Please fill out the enquiry form below and we will get back to you as soon as possible.


Opening hours

Monday to Friday: 8am to 4:30pm
We are closed on public holidays

Address and contact information

Business Name / ABN

Process Control Instrumentation Pty Ltd T/A Zedflo Australia
ABN 58 120 609 814

Zedflo operates an ISO17025 NATA Accredited Calibration Lab.

You can view our NATA scope here

We are able to calibrate all popular and leading brands including Additel, Fluke, Druck, Beamex, Crystal, Transmation, Wika, Metrel, Megger, AEMC and many more