Positive Displacement Flow Meter for Marine Positive Displacement Flow Meter for Marine is ideal for measuring oil, fuel, polyurethane, brake fluid, Skydrol® and other non-abrasive, low- to mid-viscosity lubricating fluids. The JV-KG Positive Displacement Spur Gear Flow Meter is ideal for measuring oil, fuel, polyurethane, brake fluid, Skydrol® and other non-abrasive, low- to mid-viscosity lubricating […]