Millipore M Air T Air Sampler
The Millipore M Air T is a portable active air sampler designed for the microbiological monitoring of ambient air. The instrument operates according to the sieve impactor principle: a defined volume of air is drawn through a micro-perforated stainless-steel sieve and evenly directed onto the surface of an agar cassette containing a nutrient medium. This allows culturable microorganisms present in the air to be collected and subsequently evaluated through incubation.
Technical Specifications
| Feature |
Specification |
| Manufacturer / Brand |
Millipore / Merck |
| Model |
M Air T Air Tester |
| Type |
Portable active air sampler |
| Sampling principle |
Sieve impactor method |
| Application |
Microbiological air and environmental monitoring |
| Typical applications |
Cleanrooms, controlled production areas, aseptic areas, barrier systems and critical filling areas |
| Airflow rate |
140 L/min for the first 500 L, then 180 L/min |
| Maximum sample volume |
1,000 L (1 m³) |
| Time for 1,000 L |
Less than 7 minutes |
| Sieve |
Micro-perforated stainless steel 316 |
| Number of openings |
Approximately 1,000 micro-perforations |
| Sampling head |
Anodized aluminium |
| Housing |
Epoxy-coated aluminium |
Operating Principle
The M Air T is designed for active microbiological air monitoring. Ambient air is drawn through the micro-perforated sieve at a defined airflow rate. Culturable microorganisms contained in the air are impacted onto the surface of the agar cassette positioned beneath the sieve.
The even distribution of the airflow across the agar surface helps minimize colony overlap and facilitates subsequent manual colony counting. Specially designed pre-filled agar cassettes provide a consistent filling height and a constant distance between the sieve and agar surface, supporting reproducible sampling.
Applications
The M Air T is particularly suitable for:
-
Microbiological environmental monitoring
-
Cleanroom monitoring
-
Pharmaceutical production areas
-
Aseptic and critical filling areas
-
Controlled production environments
-
Barrier systems and isolators
-
Microbiological air-quality testing
-
Detection of culturable bacteria, yeasts and moulds
According to the manufacturer, the system was specifically developed for monitoring microbiological air quality in cleanrooms, barrier environments and critical filling areas.
Condition
The device is in good overall condition. It shows minor signs of cosmetic wear consistent with previous use.
