Abstract: A dry powder aerosolizer for both dispersing and investigating the propers, behavior and measurement of airborne particles has a cylinder and a piston head dividing the cylinder into first and second sub-chambers. The first sub-chamber contains a quantity of dry powder and the second sub-chamber has an inlet opening in communication with an input flow controller admitting pressurized air flowing into the first sub-chamber about the periphery of the piston head to aerosolize the dry powder. The aerosolized powder exits the aerosolizer through a flow control tube extending through a square shaft to which the piston head is mounted. An opposite end of the square shaft extends through a Pelton turbine wheel to which a tangential flow of pressurized air is introduced from the input flow controller to cause rotation of the piston head.