Parsum Probes are designed for in situ, real-time size and velocity measurements of solid particles suspended in a pneumatic or gravity gas stream. Parsum uses spatial filter velocimetry and measures particles in a range from 50 to 6000 µm with velocities from 0.01 to 50 m/s. The probes are robust, waterproof and dustproof which makes them ideal for use in an industrial environment. If necessary, Parsum Probes have an ATEX approval.