... Room Filter Testing FeaturesMeasures 5 particle sizes; 0.3, 0.5, 1.0, 3.0 and 5.0 um in cf or ... to 98.0%RHSpecifications Channel Sizes0.3 um, 0.5 um, 1.0 um, 3.0 um, 5.0um Flow Rate 0 ... SourceLaser Diode CalibrationPSL particles in air Counting Efficiency50% at 0.3 um; 100% for particles > 0.45 um (ISO 21501-4 ... , Thermal Printer,Temperature/Relative Humidity Probe, Carrying Case Laser Particle Counter