IQAir 201-12-01-01 3 microns (the size of bacteria), the ParticleScan Pro also incorporates advanced data logging, compatibility with Mac and PC, and network readiness. Featuring advanced laser technology that can register particles as small as 0. The IQAir ParticleScan Pro is designed to measure airborne particulate concentrations anywhere – indoors or outdoors, and in normal or polluted environments.