I'll try my wired plug on the crystalfontz when my stuff comes in. If that doesn't work, I'll just plan on sending you the unit back.

We know the unit works with a Big NG.

The really strong point I see the SF800 is the specified accuracy and digital readout. 1% accuracy is exceptionally good for a flow rate meter, even my 14" tall King Instruments flow rate meter is only good to 2%.

So the meter should also be a good meter for testing purposes.

I'll tinker around with this one some more in some better loops, then I'll send it back your way with the extra couplers. Probably just my picky 680i motherboard, I hooked a DDC2 to it the other day and was getting all sorts of sporatic RPM readings that I wouldn't trust for anything...wierd.