Search this site using the advanced search features to find one of the recent threads related to flow measurement for Bio-Diesel. (Refer to ASTM D 6751 for the B100 biodiesel fuel blend specification.) The Biodiesel product specifications are unremarkable. Most flow meter technologies compatable with distillates shoule be compatible with B100. However, any flow meter selection requires knowledge of the purpose for the flow measurement, approximate flow rate and line size as well as the maximum and minimum pressure. Consider orifice plate, PD meter, V-Cone, vortex shedder, turbine meter, and many other meters. In internal unit flow meter would be a different selection than the truck loading flow meter.