Pressure metrology

Pressure Instrument Capabilities

InstrumentNATA AccreditedTraceableRangeAccuracy
Mechanical Gauges
(Class 0.6 and above)
X1.5 bar to 1000 bar
20 psi to 15000 psi
0.5% of Reading
Digital GaugesX1.5 bar to 1000 bar
20 psi to 15000 psi
0.5% of Reading
Pressure TransducersX1.5 bar to 1000 bar
20 psi to 15000 psi
0.5% of Reading
Pressure TransmittersX1.5 bar to 1000 bar
20 psi to 15000 psi
0.5% of Reading
Pressure IndicatorsX1.5 bar to 1000 bar
20 psi to 15000 psi
0.5% of Reading

Key information

Classes and accuracy specifications

Industrial mechanical pressure gauges and digital pressure gauges typically specify errors as a percentage of F.S. (Full Scale). For digital pressure gauges, the convention in the specification sheet is to state “0.5% F.S.”. For mechanical pressure gauges, this is usually stated as their class. “cl 1.6” would be a class 1.6 gauge, meaning it is accurate to 1.6% of it’s F.S. value. 


As an example – one can expect that for a 400 bar, cl 1.0, mechanical gauge, readings at any point in its range would fall within 4 bar of the actual value. 

Another example – a 100 kPa, 0.2% F.S. digital gauge could be expected to read within 0.2 kPa of the actual value at any point in its range. 


More accurate devices may state their accuracy as a percentage of reading. For example – 0.1% of reading. On a 15000 psi gauge, this would mean that at 5000 psi the accuracy is 5 psi, and at 15000 psi the accuracy is 15 psi. 


One question that commonly arises at this point is – how does the calibration laboratory know what the actual value is? Generally, we use instruments which are 4x or more accurate than the accuracy specification of the instrument being calibrated. This ensures that we can say with confidence how well the instrument being calibrated is performing. 

NATA Accreditation

Complete Calibration Services Pty. Ltd. is planning to acquire NATA accreditation for Pressure Calibration by the end of 2024. NATA Accreditation is objective proof of CCS’s technical competence in the area of Pressure Calibration. Despite not holding accreditation for this activity, CCS is accredited to ISO 17025 for other calibration activities. We hold ourselves to the highest standards for all calibration work performed so customers can trust our results. A link to our current NATA Scope

NATA Accreditation allows us to service all customers that maintain a quality system, including ISO 17025:2017 and ISO 9001. 

Adapters and Fittings

CCS has a large and expanding library of pressure adapters and fittings. No matter the thread of your pressure gauge we can calibrate it. 

If there are any unique requirements related to adapting or fitting to your gauge, we are happy to accommodate to the best of our ability. 

Fluid Mediums

CCS currently offers calibration of gauges on oil only. Should your gauge have particular requirements related to the fluid it will be used with, please make us aware. We are always happy to meet and exceed customer requirements. 

Calibration Standards

CCS will seek accreditation to two pressure calibration standards:

MSA Test Method 1 – Calibration of Pressure Calibrators, Indicators and Transducers

MSA Test Method 2 – Calibration of Mechanical Pressure Gauges

Standards ensure consistent methods and techniques are applied across labs and therefore comparable results are produced. They apply to a specific set of equipment and govern the environment, setup, reference instruments, methodology and results processing that must be used when performing calibration. 

Customer requests

CCS is happy to accommodate requests customers may have as best we can. Should you require a personalised report format, a pressure vs. load chart or another specific piece of information we would be happy to explore how we can assist. We strive to provide industry-leading customer support and satisfaction. 

Relevant Services

Equipment Cases

Have your instrument return with a new custom case! 

Many customers send instruments in boxes or bags that haven’t been designed for the instrument. If you would like your item sent back in a brand new, high-quality case with a custom-fit insert, get in touch today. We care about your instrument and want it to have a long service life in your organisation. 

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