Dekati eFilter application to indoor, outdoor and stack emission measurements

Gravimetric PM mass is a widely used method for determining particulate concentration. Different variations of the gravimetric principle are used as references in standards and legislation. While generally accepted as an accurate method, gravimetric measurement suffers from the lack of real-time data.

Dekati® eFilter™ is a new instrument which combines gravimetric PM measurement with real-time diffusion charging and current measurement. Knowledge of PM accumulation on the filter can be used for a variety of purposes from temporal concentration information to data verification. In this work we examine the eFilter™ measurement principle benefits and drawbacks. In addition, we present setups for indoor/outdoor and combustion source measurements and new data from recent studies along with comparisons to other instrumentation.