Index >> Air Microbiology >> Hollaender and Dalla Valle Sampler

Hollaender and Dalla Valle Sampler - This sampler consists of a brass container with removable bottom. The container is fitted with an inverted glass funnel. In the lower portion of container a petridish base with medium is placed which can be screwed tightly against the gasket during sampling.

The funnel is kept just above the petridish without touching it. The inside of the funnel and rim are swabbed with alcohol before use. The air sample passes through the funnel stem and the airborne microorganisms are impinged upon the agar medium.