The best environmental monitoring and validation processes are designed with the desired end result in mind from the outset.
At Cherwell Laboratories we have designed and produced media formulations, settle plate stands, contact plate carriers and air sampler tripods to ensure you get the precise results from your EM program that you need.
We have also created bespoke packaging solutions, such as the one we developed for Great Ormond Street Hospital, and our special barrier packs for gamma-irradiated media.
Additionally, we offer a tailored calibration service for your SAS air samplers, including an onsite option, to ensure your insruments are also in top condition.
Electro-polished stainless steel
You might need bespoke media set a specific distance above the surface. Use plate carriers to ensure your plates are transported
Top performance levels maintained
Make sure your SAS and ImpactAir microbial samplers are perfectly calibrated to ensure optimum performance and reliability for repeatable results you can trust.
Use accessories for precision placement
Position your SAS microbial air samplers precisely using floor standing tripods and table top stands for reliable results you can trust. Keep a supply of spare sampler heads as well.
Settle plates are used to monitor the level of viable particles in the environment through a process of passive air sampling. A viable particle settles on agar plates at a rate dependent on its characteristics and the airflow in the environment.
EU GMP Guide Annex 1 has recommended that 90mm settle plates can be exposed in cleanroom environments for up to 4 hours. However, agar plates may dry out during long exposures where the rate of air exchange is high. So, it might be necessary to use deep filled settle plates, or replace the settle plate after a shorter time to ensure satisfactory growth promotion after exposure.
Typical requirements suggest 1,000 litres per air sample in high risk areas, such as: grade A filling lines, grade B clean rooms, operating theatres etc. As the criticality of the area reduces, the sample size can be reduced. The aim is to achieve a representative sample; so where higher counts would be expected, a smaller sample produces a more realistic number of cfu to count.
The majority of our prepared media can be stored in ambient conditions, not exceeding 25ºC. There are only a small number of very specialist products that require different storage conditions.
We have never specified refrigeration as a storage condition for our general media as this causes excess condensation and can result in very wet agar, rendering it impossible to use.
Yes. We have almost thirty years' experience with helping pharmaceutical and associated industries deliver environmental monitoring processes critical to the manufacture of heavily regulated products.
We supply every component you need to create environmental monitoring processes. We also offer bespoke formulations, accessories and even packaging solutions for organisations with very particular needs.
Get in touch today. Let's discuss your requirements.
Selective growth media contain components that will inhibit the growth of some types of microorganisms, while supporting the growth of others.
General purpose media, such as Tryptone Soya Agar, are used to produce total counts. While selective media, such as XLD for Salmonella species, are used to test presence/absence of specific types of microorganism.