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Gravimetric analysis samples require filters to be weighed both before and after sampling to determine the amount of contaminate collected. Zefon® match-weighed cassettes eliminate the need of weighing filters before sampling by providing two filters which are matched in weight. The top filter collects particulate and the bottom filter serves as a control. After sampling, both filters are weighed and the difference in weight equals the amount of contaminate collected. 

Features
• Each cassette labeled with serial number
• Color coded to indicate filter type
• Preloaded - ready to use

*Limited shelf life

Part NumberFilterDiameterPore SizeHousing StyleBand ColorWeight ToleranceQuantity
ZE-5M92MMCE25 mm0.8 μm2-Piece StyreneBlue25 mm50/Box
ZE-5M93MMCE25 mm0.8 μm3-Piece StyreneBlue25 mm50/Box
ZE-7M92MMCE37 mm0.8 μm2-Piece StyreneBlue37 mm50/Box
ZE-7M92M-R-SBMCE37 mm0.8 μm2-Piece StyreneBlue37 mm50/Box
ZE-7M92M-TNMCE37 mm0.8 μm2-Piece Tenite, Meets Requirement Of ASTM D2276Blue With Security Band37 mm50/Box
ZE-7M93MMCE37 mm0.8 μm3-Piece StyreneNone37 mm50/Box
ZE-5M52PPVC25 mm5.0 μm2-Piece StyreneRed25 mm50/Box
ZE-5M53PPVC25 mm5.0 μm3-Piece StyreneRed25 mm50/Box
ZE-7M52PPVC37 mm5.0 μm2-Piece StyreneRed37 mm50/Box
ZE-7M53PPVC37 mm5.0 μm3-Piece StyreneRed37 mm50/Box
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