The Microdust 880nm is an ideal survey instrument for the assessment of real-time fine dust concentration in mg/m³. The Microdust is portable and is suitable for both fixed site and general survey applications. It is especially useful for quick scanning spatial variations in dust concentration and detecting dust sources.

The instrument uses a modulated beam of infra-red light projected forward into a measurement chamber. When dust enters the sample volume, the light beam is scattered forward within a narrow angle to the receiver. By using a narrow angle of scatter, the instrument's sensitivity to variations in the refractive index and colour of measured particulate is reduced.

Measurements are performed in the range of 0.001 to 2.500 mg/m³ or 0.01 to 25.00 mg/m³.