Marple Cascade Impactor, 8-Stage Personal Sampler SKU: TE-298

8-Stage Personal Cascade Impactor for Precision Aerodynamic Particle Size Analysis

The TE-298 Marple Cascade Impactor delivers precision aerodynamic particle size distribution from 20 to 0.5 micrometers for personal exposure monitoring and workplace aerosol characterization. The impactor can be used with four, six, or eight stages with cut points ranging from 0.5 micron to 21 micron aerodynamic diameter, providing comprehensive particle size fractionation in industrial hygiene and environmental monitoring applications.

Operating Principle

Sampled air enters the inlet cowl and accelerates through six radial slots in the first impactor stage. The cowl eliminates ashes and debris from the sampler. Particles larger than the cut-point of the first stage impact on the pre-cut collection substrate. The air flows through the narrower slots in the second impactor stage and smaller particles impact on the second collection substrate. This process continues to the final filter. The width of the radial slots is constant for each stage but smaller for each succeeding stage. The jet velocity is higher for each succeeding stage, and smaller particles eventually acquire sufficient momentum to impact on the collection substrates. After the last impactor stage, remaining fine particles are collected on the built-in 34mm filter.

Key Specifications

• Flow rate of 2.0 LPM for optimal performance
• Eight Impactor Stages (21.3, 14.8, 9.8, 6.0, 3.5, 1.55, 0.93 and 0.52 Micron Cut-Points)
• Compact, rugged and lightweight (170 gm for the four-stage design)
• Can be used with a wide variety of commercial personal sample pumps
• Lightweight for minimal user interference

Complete System Includes

• Aluminum 8-stage impactor assembly with inlet cowl
• Built-in back-up filter holder
• Screwdriver tool for assembly/disassembly
• Personal mounting bracket

Sampling Procedure

Prior to sampling, collection substrates and the back-up filter are weighed and placed in the impactor. A commercial-type personal air sampler pump with a flow range from 0.5 to 5 liters will accommodate the New Star Marple Personal Cascade Impactors. The typical flow rate is set at 2 lpm (liters per minute). The impactors personal mounting bracket is attached to the lapel or pocket. After sampling, the substrates and filters are weighed. Weight increase on each substrate is the mass of the particles for that impactor stage. The total weight of particles on all stages and final filter is added and the percent particle mass in each size range is calculated.

Applications

• Personal exposure assessment for workplace aerosols
• Industrial hygiene monitoring
• Respirable particle mass fraction determination
• Occupational health and safety compliance
• Environmental aerosol characterization
• Source emission testing

The TE-298 provides the precision and portability required for comprehensive particle size distribution analysis in demanding field environments, making it an essential tool for environmental professionals and occupational hygienists.