The apparatus and method for detecting aerosol includes transmitting a light beam, focusing at least one image sensor having a field of view that encompasses at least a portion of the light beam on a portion of the light beam, capturing an image of the light beam by the image sensor, and detecting aerosol if the image of the light beam has a predefined shape and at least a predetermined intensity. Image signals of a current input frame and a previous input frame are used. A tire pressure indicator detects air inflation pressure of the tire. The collector registers meters that respond as level two meters.