Profile: Sparling Instruments, LLC. designs and manufactures fluid flow measuring products We are an ISO 9001 certified company. We provide propeller flowmeters and magnetic flowmeters. Our brands include TigermagEP™. Our propeller meters have a blade which rotates as the flow passes, and these rotations are interpreted as flow by a totalizer usually mounted on the meter. These meters do not require a power source to totalize flow & can measure liquids with up to 5% suspended solids, at temperatures up to 100°F.