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Technical features
Feature
Cat. No.
Air flow
Use with
Portable
Battery
Battery life
Speed sensor
Intended use
Principle
The Surface Air System (SAS) encompasses several models which use the same principle.
Air is aspirated at a fixed speed for a variable time through a cover which has been machined
with a series of specially designed small holes. The resulting laminar airflow is directed onto the
agar surface of a "contact plate" (or Petri dish) containing media suitable for the microbiological
examination to be performed. When the pre-set sampling cycle is completed, the plate is
removed and incubated. The organisms are then visible to the naked eye and can be counted in
order to assess the level of contamination.
The basic idea
The major points of the Surface Air System (SAS) are:
1
To use a simple and inexpensive "contact plate" ("SURFAIR PLATE",
"RODAC") for surface, hands or air control. These plates are very well
known and easily available and can be purchased ready poured with
different media.
2
To sample a known volume of air for a variable time to provide a
large range of sampling volumes.
3
To aspirate air in a laminar flow pattern with sufficient velocity to
impact organisms on an agar surface.
SAS SUPER ISO USB 100 Contact
710-2088
100 l/min
55 mm contact plates
Yes
Rechargeable
70 000 litres
Yes
SAS SUPER ISO USB 180 Contact
710-2087
180 l/min
55 mm contact plates
Yes
Rechargeable
40 000 litres
Yes
4
To accumulate data on the level of hygiene in each environment
so that fluctuations can be monitored.
5
To take advantage of advanced electronics for more reliable
results in different operating conditions.
6
To have the flexibility to choose between 55 mm contact plates
or 90 mm standard disposable Petri dishes.
7
To apply cGLP and cGMP to air sampling operations.
8
To organise sequential sampling to obtain a more representative
sample under actual operating conditions.
SAS SUPER ISO USB 100 Petri
710-2090
100 l/min
90 mm Petri dishes
Yes
Rechargeable
70 000 litres
Yes
Instruction manual | vwr.com
SAS SUPER ISO USB 180 Petri
710-2089
180 l/min
90 mm Petri dishes
Yes
Rechargeable
40 000 litres
Yes
5
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