There is an astonishing selection of petroleum compatible flow sensors - from sketchy inexpensive items to $1K+. Is there a middle ground that someone has knowledge of? I'm trying to measure fuel consumption, diesel in particular, of about 1-3 gallons per hour. This is a 10KW generator head belt driven by a Yanmar L100 ~9HP single cylinder diesel engine. This is a one-off fabrication for home power in case of storm - I live in south Florida. Very tired of gasoline generators and the attendant gasoline supply issue when things blow down. I can always get plenty of diesel (even when things get blown away) and it stores much better than even non-ethanol gasoline not to mention the better efficiency of diesel engines. I'm hoping someone has a suggestion for such a sensor or at least a source or two to search on. Control panel is, of course, Prop driven so looking to add an extra input.