EMD Millipore, the Life Science division of Merck KGaA, offers the EZ-Fit Filtration Unit, a ready-to-use, disposable filtration device for bioburden testing. The unit, which conforms to international standards (USP/EP) and water testing regulations, can be used for filtration of liquid samples including water, raw materials, in-process samples, and final products.
 
The shape of the funnel and the plastic material minimize sample residue to ensure that the complete sample volume reaches the membrane surface. The design reduces the risk of leaks and prevents sample from by-passing the membrane to allow filtration of the entire volume. Following sample filtration, the membrane is perfectly flat; when transferred, the entire surface of the membrane is in contact with the culture media.
 
The EZ-Fit Filtration Unit is pre-sterilized and the lid remains in place during filtration to prevent contamination. To further maintain sample integrity, a rim prevents forceps from accidentally touching the membrane filtration area during transfer. The system allows one-handed funnel removal. In addition, the clear funnel with a larger diameter enables easy sample pouring and visualization of the end of filtration. Level indicators on the funnel eliminate the need to turn it when placing on the filtration support.
 
The units are available in 100 mL or 250 mL funnel sizes and are either individually bagged or packaged in bulk. Additionally, the units are stackable to save space in the laboratory. 

EMD Millipore