A portable, battery operated, handheld mass monitor that simultaneously provides five important mass ranges (PM₁, PM₂.₅, PM₄, PM₁₀ & TSP) for indoor air quality monitoring

A handheld particle monitor to simultaneously measure and record mass and count of PM₁, PM ₂.₅, PM₄, PM₇, PM₁₀, & TSP for indoor air quality monitoring