We supply a variety of air samplers for use by producers of food and beverages such as dairy products, infant formula, canned foods, baked products, drinks and other goods, where maintaining air quality is critical to product safety.
On arrival at our facility, each unit is optimised by our in-house engineers to meet enhanced performance standards, ensuring reliable operation from day one. When correctly set up and calibrated, these robust units deliver consistent, reliable results.
Our latest SAS air samplers now feature USB connectivity for greater convenience:
• Easy data management via PDF download
• Data downloadable by USB-C memory stick
Already using microbial air samplers? We can help ensure they're still delivering accurate, reliable data. As well as new units, our engineering team can calibrate and service your existing SAS air samplers to ensure your equipment maintains optimum performance.
We also offer accessories, including tripod stands and replacement sampling heads, to support your monitoring workflow.
In this animation Cherwell explains why desiccation and cracking can occur on plates, and why a deeper fill volume may help reduce the impact in your environmental monitoring environment.
BioDivide Ltd
"Great customer service and always keeping our company informed of changes particularly concerning regulatory matters that could impact us. Helpful, friendly, efficient."
NHS Blood and Transplant
"I am always pleased with the efficiency and quick turnaround time when I send our Air Samplers off to Cherwell for their service."
MedPharm Ltd
"I met with representatives from Cherwell at the Cleanroom Technology Conference recently, and found them to be not only approachable and friendly, but also highly knowledgeable and able to help with a query I had on microbial monitoring of compressed air."
Industrial Pharmaceutical Company
"Service from Cherwell is outstanding. The equipment is extremely reliable. That's what we ask for."
Pharmacy Manufacturing Unit, Portsmouth
"Friendly, helpful, efficient. Always get a prompt reply to any query. Always feel like a valued customer. Definitely feel like the company cares about it's customers and respects the industry we work in."
Industrial Pharmaceutical Company
"The service from Cherwell is excellent, they will always try to provide help where possible."
We have created a check list of things to do when sending your air samplers in for a service
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.
SAS samplers were originally designed for Contact plates, however, a Petri dish option has been available for a number of years. It is really a personal choice, although this should be decided at time of purchase, as the sampler will be specifically configured for the plate type chosen. There are advantages for each version and we would be happy to discuss your specific needs.
No, do not put your SAS sampler in a steam autoclave. The only part that can be autoclaved is the drilled head. The unit can be wiped with alcohol wipes to decontaminate it. The only other exception is the SAS Pinocchio, parts of which can be autoclaved.
Cherwell Laboratories recommends every 12 months and we will send a reminder for the month it is due. For some situations local procedures demand more frequent recalibrations so Cherwell is happy to offer tailored recalibration date labelling and reminders on request.
The sterility of the packaged medium is assured and all but the outer layer of packaging is also sterile. Thus the risk to the environment to be sampled is greatly reduced. There is an additional benefit that the additional packaging and process extends the room temperature shelf life. This can be sufficient reason for small or irregular users to prefer irradiated.
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.
The storage condition for the majority of our prepared media is Ambient not exceeding 25ºC, the exception being a couple of very specialist products.
We have never specified storage in a fridge for our general media as this causes excessive condensation and can result in a very wet agar surface. This makes the product impossible to use.
General purpose media have nutrients that support the growth of most non fastidious culturable microorganisms. 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.
Our Redipor® media products are batch tested, QC certified and delivered when you need them
We provide additional equipment or services to make your environmental monitoring more effective
We build long-standing client relationships on understanding, commitment and trust
Do you have the right air sampler for your needs?
Choosing the best air sampler means that compliance, efficiency and consistency are met with confidence.
Learn more about types of air samplers and how each works. Download technical datasheets for each model and brochures to help you make a selection.
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Tel: +44 (0) 1869 355 500
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sales@cherwell-labs.co.uk
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