Merck Chemicals

more less

Merck offers the most complete and accurate line of microbial air monitoring systems available. The MAS-100 Microbial Air Monitoring Systems are high-performance instruments which are based on the principle of the Andersen air sampler. Air is aspirated through a perforated lid, and impacted onto the surface of growth media in a standard 90 mm Petri dish or 60 mm contact plate. Microorganisms impact the culture media and the colonies are counted after a proper incubation period. The system measures the inflow of air and regulates the aspirated volume to a constant value of 100 liters/min.  All MAS-100 air samplers comply with the guidelines of the ISO 14698 part 1 and part 2.

© Merck KGaA, Darmstadt, Germany, 2014


Welcome to Merck Millipore


Europe, Middle East and Africa Asia / Pacific North America, Central America and the Caribbean South America

Please choose your country:

North America, Central America and the Caribbean

South America

Europe, Middle East and Africa

Asia / Pacific

All countries from A to Z

If you can't find your country please click here.


Privacy Statement



Merck Chemicals Cart ()

You are entering the Millipore online shop. Both carts are maintained for you while you shop between sites. We recommend to complete your Merck order before visiting

Go to Millipore Proceed to checkout

What kind of products are you looking for?


Bio manufacturing and Life science.

Merck Chemicals

High-quality industrial and laboratory chemicals.

Important message

It is currently not possible to order Bioscience products together with other Merck products. We recommend completing your current order first.

Do you wish to proceed without completing your current order? If so, this will empty your shopping cart.