It has been well documented that that this product does not adequately address the metered rates of gallons in comparison to liters. Although the product does provide the choice of units between gallons and liters both choices in the menu give the same units of flow which is accurate with the liter menu choice. This has been a very long standing issue and I do not know why the manufacturer can not make a simple firmware change to make this work as designed and documented. There should be no reason that a user has to recalibrate the unit for gallon measures. Since More Winemaking supports the sale of this product perhaps corporate influence can get this problem corrected permanently.

I don't usually write reviews but I see other reviews mentioning gallon mode not working. I noticed that is the case as well but I was able to easily resolve it. So if you want your unit to work with gallons read on! If you look at the calibration factor the default value is 9.4 “LPM” (the value for the K-factor is pulses per liter not liters per minute). When you change to gallon units the K-factor changes to 2.48. There are 3.78 liters in a gallon of water and 9.4/3.78 is ~2.48. Since liters are in the denominator they should have multiplied that value by 3.78 not divided (a gallon is bigger than a liter so it will need more pulses not less). 9.4*3.78 is 35.53 and if you change the calibration factor to that in gallons mode you get much much closer. Unfortunately this bug means you can’t easily switch between liters and gallons without fixing the calibration factor each time but presumably anyone who wants to use this in gallons mode wouldn’t be switching it to liters very often. In response to Ken Larson’s review; all of his points are spot on in my opinion except his point on calibrating — he makes it sound much more difficult than it needs to be. It only took me a few tries to get a reasonable calibration figure. First of all the value of 35.76 that he came up with is extremely close to what the factory value would have been (the 35.53 from above) had the firmware done the math correctly. But moving beyond that I dialed in my calibration with a few iterations. I have some rubbermaid 1-quart and 1-gallon pitchers (with measuring marks on them) so I used those. I set the Fill-O-Meter to dispense 0.25 gallons (32 oz) of water and saw where it landed on my 1-quart pitcher and adjusted my K-factor based on that. For example if it had dispensed 10 oz of water my K-factor needs to adjust by (32/10) or 3.2. So multiply your K-factor by 3.2 and try again. Repeat until you’re happy with the accuracy then try dispensing a gallon into your 1-gallon container. For me it was spot on to the measuring mark. I landed at 33.86 as my K-factor on my RO system. For the price this thing is pretty great. It takes a little bit of messing around to get it calibrated and dispensing correctly but I feel that anyone should be able to dial it in with a few minutes of trial and error with the process I followed. I would suggest that MoreBeer and KegLand discuss fixing the bug described above and also documenting a more sane calibration process. I would love a unit with an updated firmware that fixes this issue.

Well worth being able to fill a 3 gallon container and not sitting while it fills up. Can go do other stuff and not worry its over flowing. I use it with a RO system for making my brew so had to goto kegland site to get directions that would download to an IPhone to calibrate flow x 10. Morebeer directions wouldn’t work was pdf. Once adjusted works like a champ saves time and cleanup from over filling. Haven’t seen a temp reading yet but not worried about that yet

I have tested two off these units and passed over one thousand gallons through them getting the same results (testing in both using gallons and Liters - I use gallons). I also ran a commercial $750 digital water meter in-line with this unit in order to verify my results. Positive things that I found: - Once calibrated the "set water to be delivered" came within plus or minus 1% of the set value (for a $100 product - very impressive!). - No battery required and memory saves previous settings during a power failure. Problems that takes it down to three stars: -"Temperature" always displays "000 c" - doesn't work - "Instantaneous Value" displays numbers that are not even close to the actual flow rate. - Calibration requires a commercial digital water meter or a precision volume measuring device. Calibration "K-Factor" comes set at "9.4" not close (no instructions on a calculation method) to what you will end up with (mine was 35.76). It is all trial and error and requires a lot of trials to find the best calibration "K-Factor" number. - The 1% accuracy can only be achieved if there is a good quality pressure regulator in front of the "FILL-O-METER". - the inlet and outlet is a British Standard Pipe thread (similar to 1/2" pipe thread but is a straight thread and uses a rubber 0-ring to make the fitting not leak). It would be nice if the manufacture provided connection fittings. In conclusion: - More Beer customer service was top notch! They sent an exchange replacement immediately with a return label for the first one. They offered a full refund if I wanted to return the second unit as well - They were great! - Once calibrated I can set my desired fill hit start and walk away. - This device falls well short of what it is supposed to do but I decided to keep it because for $100 you can not go wrong and it is well worth it.

I love it with the exception that I can only use in in liter mode. When I put it in gallon mode I only get about 2 qts per 5 gallons before it shuts off. I returned the first one got the 2nd one and it works only in liter mode that is saturate. I'm keeping it and using it by converting gallons to liters Would be helpful if they provided a detailed instruction on how to get the gallon function to work correctly No fault of morebeer they were very very helpful.

The unit is very good it had to be recalibrated when I changed measurements from liters to gallons.