Casella Sampling Accessories - for personal sampling pumps

• Typical filter cassette
• available in either 25 mm (1 inch) or 37 mm (1.5 inch) diameter
• 3 part cassette with end plugs to keep filter clean before use
• ensures minimum handling to keep filter clean
• red plug and blue plug to keep out air until ready for use
• take out plugs when in use and put back the other way round to show cassette has been used

• Cyclone adapter
• designed to separate particles out to obtain the respirable fraction (<4 microns)
• larger size particles are drawn into cyclone and are deposited into the dust pot at the bottom due to their weight
• smaller respirable size particles are drawn upwards onto the filter
• available with either 25 or 37 mm filters
• use with pump set to 2.2 to 2.5 L/min flow rate
• manufactured from anti static plastic to prevent particles from sticking to the cyclone body and hence not being weighed at the end of the run

• IOM head
• the IOM sampling head can be used for a wide variety of applications
• 25 mm diameter filters should be used in this sampling head
• can be used with various PUF filters to separate out the total, thoracic and respirable dust fractions
• can obtain two different fractions of the dust at the same time
• made from conductive plastic

• Asbestos head
• plastic cassette 25 mm diameter supplied already fitted with a filter in the top end of the tube
• filter is gridded to assist in the counting of asbestos particles when sent for analysis at a laboratory
• manufactured from conductive plastic to ensure all the particles are trapped on the filter

• PUF filters
• polyurethane foam filters with different porosity and size
• enable the different fractions to be separated out to get simultaneous measurements of two concentrations at a time
• can be used to obtain the PM10 and PM2.5 fractions when used for environmental surveys
• can be used with 4 micron filters for respirable measurements
• can be used with the Microdust pro for outdoor measurements

• Low flow adapter
• use this adapter when flow rates below 800 mL/min are required
• can set the flow rate down to 5 mL/min
• shown here with constant pressure controller at bottom and sorbent tube attached at top
• adjust flow to required rate using needle valve shown at top at end of hose

• Gas bags
• these are used together with a personal sampling pump to collect a sample of the air for later investigation
• select the bottom of the range flow rate on the Apex pump (800 mL/min)
• connect the gas bag to the outlet port on the pump
• start the sampling and when the bag is full the pump will shut off automatically
• seal the septum (valve) on the bag and use a hypodermic syringe to extract samples of the air for analysis

• DryCal (Defender calibrator)
• use this accessory as a primary source of calibration to check the flow rate selected in a sampling pump
• improved version of popular DryCal units (not available after Jan 2007)
• 2 models 510/520 for basic or enhanced features
• 3 versions available in each model for low, medium and high flow ranges
• 5 mL/m to 30,000 ml/m flow rates
• clean operation no bubbles or water used
• very convenient and easy to use
• quickly calibrate the flow and make adjustments to the pump if necessary

view Defender product data sheet
view DryCal product data sheet

• Rotameter
• this accessory is used to calibrate the flow rate of the pump
• read the flow rate from the float in the vertical tube
• the rotameter is a lightweight device, self powered and easy to use
• at the end of the calibration simply dismantle and store for next use
• can be used easily and quickly in the field even by inexperienced users
• should be used to check the flow rate of the pump before (and after) every measurement run to ensure the pump flow has not drifted
• specify the rotameter AND the stand for correct operation