Replacement Cassette Adapter for GS-3 Cyclone, 37 mm
- Operates at 2.75 L/min to conform to the ISO 7708/CEN criteria
- Meets OSHA criteria
- Meets ACGIH respirable TLVs
- Higher flow rate increases sensitivity for lower concentrations
- Unique design overcomes disadvantages of the 10-mm nylon cyclone
- Multiple inlets eliminate ambient wind speed and orientation effects
- Conductive plastic eliminates electrostatic effects
- Not a spark hazard for underground mine use
|Sample Rate||2.75 L/min for 4-µm 50% cut-point * (OSHA silica rule)|
|Sample Pump||Universal or AirChek series|
|Sample Media||25 or 37-mm filters in 3-piece cassettes|
|*||Calibrated at U.K. Health and Safety Laboratory|
GS-3 Respirable Dust Cyclone
Meets ISO 7708/CEN Criteria
GS-3 Cyclone’s Unique Design
The Multiple-inlet GS-3 Cyclone
The GS-3 Cyclone is a 10-mm lightweight conductive plastic sampler used with a standard three-piece cassette with filter for the collection of respirable dust particles. The GS-3 Cyclone’s removable cassette adapter securely holds the filter cassette in place during sampling. Designed to conform to ISO 7708:1995/CEN particle size-selection criteria, the GS-3 Cyclone has a 50% cut-point of 4 µm (bias within ISO/OSHA/NIOSH requirements) at 2.75 L/min (Calibrated at U.K. Health and Safety Laboratory).
OSHA Publishes Final Rule on Respirable Crystalline Silica
In its final silica rule, OSHA sets a new permissible exposure limit (PEL) of 50 µg/m3 across all industries covered by the rule and abandoned the previous silica PEL formula. In addition, the OSHA final silica rule states that any sampler conforming to the ISO 7708/CEN criteria (50% cut-point of 4 µm) can be used for workplace silica. The ISO 7708 criteria have been adopted by NIOSH, ACGIH, and many other global occupational hygiene organizations. SKC GS-3 Cyclone performance data, relative to the ISO 7708/CEN standard, was published in the Journal of Aerosol Science, 28, 1997.
Traditionally, respirable dust sampling with a cyclone has been performed using a clear styrene cassette. NIOSH now suggests that conductive black polypropylene cassettes are a better option for this application to minimize cassette wall losses.
Collection efficiency relative to ISO 7708 standard in OSHA final silica rule and ACGIH TLVs
(click to enlarge)
GS-3 Cyclone Superior Performance
With low mean bias and higher flow rate requirements, the GS-3 Cyclone provides better sampling accuracy when compared to the performance of other cyclones used for respirable dust collection. Furthermore, the multiple-inlet GS-3 Cyclone overcomes sampling problems that have been reported with the single-inlet 10-mm nylon cyclone.
Kar, K. and Gautam, M., "Orientation Bias of the Isolated 10 mm Nylon Cyclone at Low Stream Velocity," AIHA Journal, Vol. 56 (1995), pp. 1090-1098
Gautam, M. and Sreenath, A., "Performance of a Respirable Multi-inlet Cyclone," Journal of Aerosol Science (U.K.), Vol. 28, No. 7 (1997), pp. 1265-1281
Trakumas, S., et al., Performance Assessment of Personal Respirable Cyclone Samplers, AIHce Presentation 191, 2003, http://bit.ly/1hvQBNt (PowerPoint presentation)
OSHA Final Rule on Respirable Crystalline Silica, https://www.osha.gov/silica/
|Unit of Measure||ea|