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Sensidyne

Membrane Filters and Cassettes

Membrane Filters and Cassettes for Air Sampling

Cassette Sizes and Types

37 mm – Clear Cassette Housings 25mm and 37mm for Personal Air Sampling Applications Available in both a standard two-piece style and a three-piece style. These cassettes meet the NIOSH requirements for sampling most dusts, fumes and mists. Three-piece cassettes allow open face sampling, typically for asbestos and other fibers.

25 mm – Available only in three-piece style, this cassette is used only for "Open Face" sampling and meets specifications for asbestos sampling, as described by NIOSH, OSHA and EPA. It has a two-inch extension cowl, assuring proper fiber distribution for microscopic fiber counts. The carbon imbedded body reduces static charge.

Membrane Types

PVC, Teflon, Glass fiber, Silver, Quartz and MCE (Mixed cellulose ester).

Cellulose Shrink Seals

Available in both 25mm and 37mm sizes, these bands are applied wet around the cassette and shrink when dry to form a tight seal. The seal provides a positive non-tampering indication when the cassette is received by the lab for analysis.

Cassette Holder

Consists of tubing with clip, designed to mount the cassette to the worker’s collar close to the breathing zone.

Filter Cassettes

Back Pressure for Typical Filters While selection of a specific cassette size/type and filter membrane should be determined by review of the NIOSH sampling guide, the following rules generally apply:All dusts, fumes and powders sampling – use 37mm filter and cassette.All asbestos and fibers sampling – use 25mm filter and cassette.Dust sampling – use 0.5 micron (pore size) PVC filter membrane.Most heavy metal (such as lead fume) sampling – use 0.8 micron MCE (mixed ester of cellulose) filter membrane.*
*Note: Metals form airborne vapors when heated, as these vapors cool and condense they become small airborne particulates, known as fumes.

Buy Membrane Filters and Cassettes Online

Description	Part Number	Main Application

Pre-Loaded Cassettes
Cassette, 25mm, Classic Style, PCM, 0.8µm, MCE Black Gridded, 50/bx	GCU25080BLG	Asbestos, OSHA PCM
Cassette, 25mm, Classic Style, PCM, 0.8µm MCE Green Gridded, 50/bx	GCU25080GRG	Asbestos, OSHA PCM
Cassette, 25mm, Classic Style, PCM, 0.8µm, MCE, No Grid, 50bx	GCS25080	Asbestos, OSHA PCM
Cassette, 25mm, Classic Style TEM, 0.45µm, MCE, 50/bx	GCS25455-50	Asbestos, EPA-AHERA TEM
Cassette, 25mm Micro Vac, ea	GCU25MV
Cassette, 37mm, 3pc, 0.8µm MCE 50/bx	GCU37080	Lead, Metals, Welding Fume
Cassette, 37mm 2pc 5.0µm PVC, 50/bx	GCU37500PVC-2	Total Dust
Cassette, 37mm, 3pc, 5.0µm PVC, 50/bx	GCU37500PVC	Total & Respirable Dust & Silica, Hexavalent Chromium
Cassette, 37mm, 3pc, 2.0µm,Teflon, 50bx	GCU37200T	Coal Tar Pitch Volatiles, Benzene Solubles, NIOSH
Cassette, 37mm 3pc w/ Type A/E Glass Fiber, 50/bx	GCU37AE	Coal Tar Pitch Volatiles, OSHA
Cassette, 37mm 2pc w/ Type A/E Glass Fiber, 50/bx	GCU37AE-2	Coal Tar Pitch Volatiles, OSHA
Pre-Weighed Cassettes
Cassette, 37mm 2pc 0.8µm, MCE Matched (50µg), 50/bx	GCU37080MW-2	Lead, Metals, Welding Fume
Cassette, 37mm 3pc 0.8µm, MCE Matched, (50µg), 50/bx	GCU37080MWU	Lead, Metals, Welding Fume
Cassette, 37mm, 3pc, 0.8µm, MCE, Matched, Unb. 50/bx	GCU37080MW	Lead, Metals, Welding Fume
Cassette, 37mm 2pc 5.0µm, PVC Matched, (50µg), 50/bx	GCU37500PVCMW-2	Total Dust
Cassette, 37mm 3pc 5.0µm, PVC Matched, (50µg), 50/bx	GCU37500PVCMW	Total & Respirable Dust & Silica
Cassette, 37mm 2pc 5.0µm, PVC Preweighed, 50/bx	GCU37500PVCPW100	Total Dust
Cassette, 37mm, 3pc, 5.0µm, PVC, Preweighed, (100µg) 50/bx	GCU37500PVCPW	Total & Respirable Dust & Silica
Mold Sampling Cassettes
Cassette, Air-O-Cell 10/bx	GCAOC10	Mold
Cassette, Air-O-Cell 50/bx	GCAOC50	Mold
Cassette, 37mm .45µm PC Endotoxin Free, 10/bx	GCU3745EF
Cassette, Carpet Sampling, 10/bx	GCCS10
Cassette Housings and Shrink Bands
Band, 25mm Shrink, White, 100/pk	GB25W
Band, 25mm Shrink, White, 1400/pk	GCO25DNL
Band, 25mm Shrink, Clear 1400/pk	GB25C
Band, 25mm Shrink, Yellow 1400/pk	GB25Y
Band, 37mm Shrink, White 100/pk	GB37W
Band, 37mm Shrink, White, 1000/pk	GCO37DNL
Band, 37mm Shrink, Clear 100/pk	GB37C
Band, 37mm Shrink, Clear 1000/pk	GB37C1000
Band, 37mm Shrink, Yellow 100/pk	GB37Y
Band, 37mm Shrink, Yellow 1000/pk	GB37Y1000
Band, 37mm Shrink, Red 100/pk	GB37R
Band, 37mm Shrink, Red 1000/pk	GB37R1000
Housing, 25mm, Classic Style, 3pc, Conductive, 50/bx	GH25
Housing, 37mm, 3Pc, 50/bx	GCO37050
Housing, 37mm, 2Pc, 50/bx	GCO37050-2
Housing, 37mm 2pc Opaque, 50/bx	GH37-2
Housing, 37mm 3pc Opaque, 50/bx	GH37
Housing, 37mm 2pc Solvent Res, 50/bx	GH37SR-2
Housing, 37mm 3pc Solvent Res 50/bx	GH37SR
Housing, 37mm, Conductive 3pc, 50/bx	GH37C
Sterile Cassettes
Cassette, 37mm 3pc .45µm MCE BL Grid, Sterile, 50/pk	GCU3745BLGS
Cassette, 37mm 3pc .45µm MCE Gridded Sterile, 50/pk	GCU3745CS
Cassette, 37mm 3pc 0.8µm MCE Sterile, 50/pk	GCU37080S
Cassette, 37mm 3pc 0.8µm MCE, BL Grid, Sterile, 50/pk	GCU37080BLGS
Cassette, 37mm 3pc 0.8µm MCE, Gridded, Sterile, 50/pk	GCU37080GS
MCE = Mixed Cellulose Esters • PVC = Polyvinyl Chloride • PTFE = Teflon (DuPont Trademark) • µm or µ = micron • mm = millimeter PCM = Phase Contrast Microscope (OSHA Asbestos Method) • TEM = Transmission Electron Microscope (EPA Asbestos Method)