GS-3 Conductive Plastic Respirable Dust 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. A removable adapter is available in 25 or 37-mm diameter to hold a filter cassette securely during sampling. Some features of the GS-3 Cyclone include:

• Multiple Inlets – Multiple inlets eliminate sampler sensitivity to wind, velocity, and user orientation to the contaminant source.
• Conductive Plastic – A conductive plastic body eliminates electrostatic effects and is not a spark hazard for underground mine use.
• Higher Flow Rate - It has a higher flow rate for greater sampling sensitivity

The GS-3 Cyclone’s removable cassette adapter securely holds the filter cassette in place during sampling. Designed to conform to ISO/CEN particle size-selection criteria (ISO 7708:1995), 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) or a 3.5 µm at 3.7 L/min (Determined using experimental data obtained at flows from 2 to 4 L/min) for alternate applications. In addition, the GS-3 Cyclone meets the requirements in the OSHA proposed rule for silica.

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 minimise cassette wall losses.

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 Dorr-Oliver Cyclone.

For more information on the GS-3 Conductive Dust Cyclone, contact your local Air-Met office.