Particle Count Service

We can provide particle count measurements and certification, our complete testing and comprehensive reports will ensure your facility is meeting a certified specification.

Standards of cleanliness is measured by the amount of microscopic particles found in per metre cubic of air. The ISO 14644-1 standard sets up ISO classes ranging from 1 to 9; ISO Class 1 being the most stringent.

The standard of cleanliness to which data centres/computer rooms are recommended to be kept is ISO 14644-1 Class 8 or better. ISO Class 8 allows 832,000 1μm particles per cubic metre.

More and more hardware manufacturers are now insisting that the environments in which their equipment is located is kept to a high level of cleanliness, often including conditions to their OEM warranties.

International Standards for Cleanrooms, Clean Zones and Controlled Environments

The table below shows the Airborne Particulate Cleanliness Classes ISO 14644-1 1999.

On mobile devices, you can scroll across the table by swiping left and right as required.

Class Number of Particles per Cubic Meter by Micrometer Size
0.1µm 0.2µm 0.3µm 0.5µm 1µm 5µm
ISO 1 10 2
ISO 2 100 24 10 4
ISO 3 1,000 237 102 35 8
ISO 4 10,000 2,370 1,020 352 83
ISO 5 100,000 23,700 10,200 3,520 832 29
ISO 6 1,000,000 237,000 102,000 35,200 8,320 293
ISO 7 352,000 83,200 2,930
ISO 8 3,520,000 832,000 29,300
ISO 9 35,200,000 8,320,000 293,000

We can also provide testing for the following: air flow velocity, temperature and humidity levels, lux and noise levels.

Schedule a specialist IT clean as part of your maintenance plan