PM2.5 High Volume Air Samplers

PM2.5 High Volume Air Samplers Overview

Ambient air enters the PM2.5 Inlet at a flow rate of 40 cfm (1.13 m3/min) through an opening under the weather-proof hood. The air then flows into a stilling chamber and through a screen that is designed to prevent the entry of insects and large-sized airborne debris into the fractionating system. From the stilling chamber the air flows through a set of 40 impactor jets that direct air towards a wetted collection surface. Particles with sizes larger than 2.5 microns aerodynamic diameter impact upon a porous disc wetted with oil. Particles smaller than 2.5 microns are vented from the impaction zone and flow downward to the standard 8 x 10-inch (20.3 x 25.4cm) hi-vol sampling filter.

PM2.5 High Volume Air Samplers Specifications

PM2.5 High Volume Air Samplers Features

• Retrofit an existing high volume air sampler at only a fraction of the cost of a new PM2.5 system
• Existing quality assurance procedures used for PM10 hi-vol sampling are virtually unchanged for PM2.5 sampling
• Simple flow measurement & control with a critical flow venturi (volumetric flow controller) determines flow rate directly in actual m3/min