Technical Features; Intended Use; Principle; The Basic Idea - VWR SAS Super ISO Instruction Manual

Technical features

Feature SAS ISO 100 Contact
Cat. No. 710-0871
Air flow 100 l/min
Use with 55 mm contact plates
Portable
Battery Rechargeable
Battery life 70 000 litres
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.
4. To accumulate data on the level of hygiene in each environment so that fluctuations can be monitored.
6
SAS ISO 180 Contact
710-0872
180 l/min
55 mm contact plates
Yes Yes
Rechargeable
40 000 litres
Yes Yes
SAS ISO 100 Petri SAS ISO 180 Petri
710-0869
100 l/min
90 mm Petri dishes
Yes
Rechargeable
70 000 litres
Yes
710-0870
180 l/min
90 mm Petri dishes
Yes
Rechargeable
40 000 litres
Yes