The CAMS ImpactAir-140 from Clean Air Monitoring Solutions is a high performance slit-to-agar microbial air sampler. This state-of-the-art unit is designed for continuous monitoring in high-grade areas, where in-process sampling of viable particles is often critical. Air is drawn at high speed through a very narrow inlet slit, whereupon particles, including microbes in the air, impact and stick onto an agar surface in a Petri dish.
The Petri dish is slowly rotated under the inlet thus ensuring the air is always ‘impacted’ onto a fresh area of agar. This dramatically reduces the probability of ‘twin impingement‘, a phenomena where two microbes land at the same point and appear as a single colony when incubated. This is a known issue associated with sieve type samplers.
The ImpactAir range uses the larger 14 cm Petri dishes which allow the system to sample for longer periods onto a single dish. The sampling time is programmable from minutes to many hours. With a deep fill agar plate it is possible to sample for several hours onto a single agar plate. Sampling 1 m3 is achieved in 35 minutes and 20 seconds with the flow rate of 1 cubic foot per minute.
- Large color touch screen display
- The latest slit to agar technology for more efficient sampling
- Uses 14cm Petri dishes
- 28.3 LPM flow rate with +/- 2.5% flow rate accuracy for more accurate sampling
- Impressive d50 value of <0.5um
- HEPA filtered exhaust
- 1 minute to 4 hour sample times
- USB and Ethernet communications
- 316 stainless steel construction
- Automatic flow control
- Fully ISO-14698, EN-17141 & GMP Annex 1 compliant
- Fully automated plate height adjustment
- 1% to 100% plate usage in 1% increments
With any impaction sampler, the distance between the inlet and the surface of the agar is critical and has a major effect on the sampling efficiency. The agar in petri dishes is often not at a constant depth so the ImpactAir-140 is the first sampler of its kind to employ precision sensing and control to automatically adjust the distance throughout an entire run to ensure a consistent d50 value is maintained. This is supported by the results obtained from the independent physical and biological validation carried out by Public Health England (PHE). Full reports are available.
Unlike some other air samplers, the ImpactAir-140 due to its unique design does not shed particles so is able to operate in environments alongside particle counting devices without causing increased readings. ImpactAir-140 exhibits very low vibration and can therefore be operated near balances.
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