BestChek Asbestos Cassettes
Asbestos has so many attractive properties and has often been used in a variety of forms for construction. If building materials are not properly maintained, asbestos fibres can become airborne creating significant environmental health problems. Proper sampling is key to asbestos measurement and determining airborne asbestos concentrations. Sampling methods are also available to determine asbestos concentrations in settled dust.
The BestChek cassettes meet or exceed NIOSH, OSHA and ASTM standards in count, clearing, conductivity, collection area and construction:
- Count - Average background fibre count is <4 fibres per 100 fields
- Clearing - Filter material clears thoroughly to meet method specifications and is suitable for PCM (Phase Contrast Microscopy) analysis
- Conductivity - Cassette plastic contains over 18% carbon black for proper conductivity as tested using ASTM methods
- Collection area - Inside diameter varies by only ±5 mm2 for consistent collection area and minimised error
- Construction - Certified leak-free, cassette parts are manufactured with close tolerances and vacuum and pressure tested for leakage
All preloaded asbestos filters include cellulose supports. The cassettes are quality tested for low asbestos fibre background and supplied with a Certificate of Analysis.
BestChek Asbestos Cassettes
| Diameter (mm) | Filter and Cassette Specifications | Pack Size | Part Number | |
| 25 | Mixed Cellulose Ester (MCE), 0.8 µm, carbon-filled conductive polypropylene, black, assembled with cowl, banded, tapered-end style, for PCM analysis | 50 | 225-321 |  |
| 25 | Mixed Cellulose Ester (MCE), 0.8 µm, carbon-filled conductive polypropylene, black, assembled with cowl, banded, tapered-end style with stand-up plug in outlet end, for PCM analysis | 50 | 225-321A |  |
| 25 | Mixed Cellulose Ester (MCE), 0.8 µm black grid, carbon-filled conductive polypropylene, black, assembled with cowl, banded, tapered-end style, for PCM analysis | 50 | 225-326 |  |
| 25 | Mixed Cellulose Ester (MCE), 1.2 µm, black grid, preloaded in a 3-piece black conductive polypropylene (goblet style with extension cowl) cassette, banded with 5 cm spacer, with support pad, for PCM analysis | 50 | 225-1934 |  |
| 25 | Mixed Cellulose Ester (MCE), 0.45 µm, filter with support and 5.0µm diffuser pads, carbon-filled conductive polypropylene, black, assembled with cowl, banded, tapered-end style, for TEM (Transmission Electron Microscopy) analysis | 50 | 225-327 | |
Microvacuum Cassettes
- Nozzle for easy sampling of settled dust on surfaces
- Meets specification of ASTM Methods D5755 and D5756
- Use with personal sample pumps at 2L/min
- Also available as a Sampling Kit
| Diameter (mm) | Filter and Cassette Specifications | Pack Size | Part Number | |
| 25 | Microvacuum Cassette, MCE, 0.45 µm, carbon-filled conductive polypropylene, black, assembled with cowl and Tygon nozzle for TEM analysis | Each | 225-322 |  |
| 37 | MCE, 0.45 µm, styrene cassette (non-conductive) with microvacuum nozzle | Each | 225-9543 |  |
