US Patent 10330578 Airborne particle monitor with orientation control

A monitor includes a base, a cylindrical housing, rotatably connected to the base, and including an air-intake slot, and a collection media, a motor configured to rotate the cylindrical housing relative to the base, a power source, connected to the motor, and a processor connected to the motor and power source. The processor is configured to process information and, based on the processing, direct the motor to rotate the cylindrical housing so that airborne particles in ambient air pass through the air-intake slot and to the collection media.