The blower motor is a brush type motor with a fixed orifice on the discharge end. The GT2200 Tripod Hi-Vol is especially suited for line sampling and frequent relocation from site to site. As these measurements are usually of short duration, timers, flow controllers, recorders, etc., are not required. The tripod legs are removable to facilitate transporting. An integral orifice meter with dual pressure taps is located in the throat of the filter holder.
Flow rate is measured by manometer readings taken across the orifice meter.
It is ideally suited for intermitted verification of industrial hygiene standards and suspected pollution sources. The Handi-Vol 2000P is equipped with a variable orifice meter for measuring air flow rate. The Model GHV2000PS comes complete with Model G10768 Tri-pod Stand for complete portability.