MicroBio Air Sampler - Air disturbance

By Stephen Plumridge

All devices that move air from one steady set of conditions will cause air disturbance to varying

degrees.

MicroBio Air Sampler Design

The MicroBio air sampler is a sieve impaction class device. Air is exhausted perpendicular to the

inlet at a higher velocity to the inlet to minimise re-aspiration. Slow exhaust air can more easily be

re-aspirated by the sieve impaction head that can result in low particle collections on the sample

media, as particles from that air would have already been sampled.

When using the MicroBio air sampler (or any type of air sampler) in controlled air flow

environments consideration must be taken on the siting of the sampler and the sampler model to

reduce the eﬀects of the exhaust on air flow or on processes adjacent to the sampler.

If the MicroBio is to be used in isolator cabinets, the MicroBio MB1 or MicroBio MB2-RSH models

are advised, and these are placed on the work surface of the isolator with the exhaust pointing

unobstructed towards the air extraction within the cabinet.

If the air of the sampler must exhaust in the direction of air flow within the test environment, the air

sampler sieve impaction head should be perpendicular to the flow with the exhaust pointing

towards the direction of flow. The MicroBio MB2 sampler is recommended for this using a tripod.

MicroBio air samplers have been tested in all orientations, as part of a UK DTI validation

programme, to show the same collection performance.

Cantium Scientific is able to design and manufacture adaptions to the MicroBio sampler models

to suit customer requirements for special applications, such as exhaust diﬀusion ducts and inlet

screening for fast air flow environments.

Cantium Scientific Limited has no control of the operation of the products at customer facilities. It

is the customer’s responsibility to determine the suitability of the MicroBio air sampler to their

application.