Turbine Flow Meter Electronic 1" 1 inch 10-100L/Min Oil Flowmeter Kerosene Gas Methanol Diesel Fuel Flow Digital Meter Oval Gear Gauge LCD BSPT/NPT with Battery

Works great. The calibration coefficient on my unit was 1138 (using water at 8.9 gal/min). There is no connection between the fluid path and the circuit card - impeller is magnetically coupled to circuit card.I only had one issue. When using a cold fluid on a hot day, the display went to all 8's. It might have been condensation on the circuit card. I removed the batteries for a day, and it worked fine afterward.The instructions aren't great. Here is my version:Press C to alternate between cumulative total volume and flow rate on the lower displayReset volume: Press DReset cumulative total volume: Press D for 5sSelect units: Press C and D simultaneously for 5s-Press D to select units: Qtr, Pts, L, Gal-Press C for 3s to save unitsView calibration coefficients: Press C and D simultaneouslySet volume calibration coefficient: Press C for 5s-Press D to increment digit-Press C to go to the next digit-Setting will be stored after 10sSet flow rate calibration coefficient: Can’t find a way to set it directly, but it was accurate as received after volume calibration (displayed is 000588 in gal)

I like the meter unit but after about 2 months the reset button quit working. Other than that it’s good