FAQs Single template

As the test dust is used to check the performance of the monitor, there has to be very tight tolerances in the process, as you’ll see on the dust vial, the dust has a wide spread of particle sizes from 0.36 μm to 40 μm, once the vials have been opened, moisture can cause the particles to amalgamate, which would lead to the monitor failing a compliance check, as the particles won’t be of the correct size spread.