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Membrane Leak Test Cassette, Old Style
Old-style rubber membrane leak test cassette for use in FRM reference method filter samplers.
Description
Old-style rubber membrane leak test cassette for use in FRM reference method filter samplers. This FRM leak test tool consists of one of our standard 47mm filter cassettes with a rubber membrane disc in the filter position. This meets the exact EPA PM2.5 reference method specifications for the Internal, filter bypass leakage test in 40 CFR, but has largely been superseded by the much more effective solid “closed” tool in our model LTC leak test cassette set. It is still offered for situations where the use of a membrane cassette is specifically documented into older standard operating procedures.
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