Are used for air sampling:
1. Filter cassettes
2. Impaction cassettes
3. Impinger assemblies
4. Sorbent tubes
5. Air monitor badges

Filter cassettes
They are equipped with filters to trap some harmful substances. These filters include
a) Mixed cellulose ester – for asbestos, lead, and for metal sample
b) PVC pure homopolymer – is a sample of silica, wood and dust
A few samples of oil mist formed by glass fiber
d) Silver membrane – Samples Carbon, Black Coal, tar, coke oven
e) Teflon – samples acid mists, gases, and vapours

Zefon preloaded 37mm 2-piece cassette
Blue inlet plug
Cassette inlet
Filter Collection
Filter support pad
Cassette outlet
Red outlet plug

Zefon’s 37mm preloaded 3-piece cassette has the same dimensions as the cassette in two pieces which, in addition, has a retaining ring.
Zefon’s preloaded 25mm 3 piece asbestos-themed cassette is identical to the two-piece cassette, and it comes with a two-inch extended cowl. OSHA and NIOSH are both in favor of this cassette to conduct asbestos-related test.

Zefon has pre- matched-weighed cassettes with filter cartridges which permit gravimetric analysis. lpfnhz6jut.