Lead Sampling Cassette, 37 mm, 0.8 micron

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 2 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. The weight tolerance of match weighed filters references the maximum difference in weight from the test (top) filter and the control (bottom) filter.

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