Turbo-Flo probes consist of a low mass, high performance turbine mounted in a protective shroud at the end of a 3 foot long aluminum handle. The turbine, when immersed in a flowing stream, rotates at a speed in direct linear proportion to the fluid velocity. An electrical pulse is produced with each rotation of the turbine.

The patented design of the turbine and shroud offer unique capabilities. In combination, turbine and shroud are highly directional, enabling detection of stream patterns as well as measurement of velocity. By adjustment of a pivot, the turbine may be rotated over 90° for vertical velocity measurement and insertion into pipe discharge ends. Small size permits measurement of streams as shallow as 1.5 inches. In addition to the basic 3 foot probe, extensions may be used for an overall reach of 21 feet enabling sewer surveys from street level.