Three things to measure
The main contaminants:
- Particles: solid dust and rust that can block orifices and damage tools
- Water: liquid and vapour, measured as dew point
- Oil: aerosol and vapour from the compressor and the surroundings
Start from the requirement
Air quality is judged against what the process or equipment needs, often expressed as a quality class in an applicable standard. Different points in one plant can need different classes. We confirm the requirement with you before measuring, because a result has no meaning without it.
Sampling and method
Good practice includes:
- Choosing sample points that represent the air at the point of use
- Using suitable and calibrated instruments or accredited laboratory analysis where required
- Controlling the sampling arrangement so it does not add or remove contamination
- Recording pressure, flow, temperature and conditions
- Repeating samples where the result will drive a decision
Oil vapour and special requirements
Where oil vapour, odour or specific contaminants matter, a general particle and dew-point check is not enough. Sensitive applications such as food, pharmaceutical, medical or electronics need a specific review and, often, specialist measurement.
What you receive
A clear record of sample points, methods, results and conditions, a comparison with the stated requirement and recommendations. We do not state that air meets a particular standard unless the measurement supports it.
Start with
To arrange the work, please share:
- A simple layout or description of the compressor room, treatment and main piping
- Compressor and dryer details and operating pressure settings
- Operating hours, shift pattern and the problem you are seeing
- Any existing readings, trends or previous audit reports
Frequently asked questions
Is oil-free compressor air always clean?
Not necessarily. Intake air, piping, dryers and the environment can all add contamination. Measurement at the point of use shows the actual condition.
Which standard applies?
That depends on your industry and customer requirements. We work from the requirement you give us.
How often should air quality be tested?
Often enough to catch change: after maintenance, system changes or complaints, and at an interval suited to the process risk.