A couple things I’ve noticed when using the Tilt hydrometer:
- Dry Hopping will temporarily raise the gravity for approximately 1 day, then the chart quickly returns back to where it should have been had the dry hop never occurred
- Hop/yeast Krausen accumulate on the hydrometer and will throw off the results.
With this in mind, I agree with JA and always check for FG with a hydrometer. The Tilt is great for letting you know that fermentation is going along and is a great tool for when to dry hop as you can see primary fermentation starting to tail off. But if you dry hop, expect to use your hydrometer for the most accurate readings.
The photo below shows how much accumulates on the Tilt and it will “lean over” with any accumulations. and the brew in this photo had no dry hop additions. The Tilt works based on how far off from vertical the unit floats in solution. The more vertical, the lower the gravity reading, and with accumulations of hops or other debris in the wort/beer, it gets thrown off and yields in accurate readings. If you zoom in on the attached photo, you can see how much Krausen stayed on top of the Tilt even after the Krausen settled.
View attachment 7571