The LDT-890\AF is designed for today’s “Bio” fuels. It is recommended for Ethanol and Methanol blends above 20% and Biodiesel blends above 5%. Additionally, the LDT-890\AF will work with many chemical applications, as well as today’s traditional gasolines, diesel and aviation fuels! The LDT-890\AF System eliminates guesswork. In its unique calibration mode, it provides on site verification of leak rate and is capable of simulating leaks between 1 and 5 gal. per hour @ 10 PSI.