Review on 🌡️ Fermometer Adhesive Temperature Strip by Irene Bra

Ideal for temperature control. I've used several of these over the years and also used a temperature sensor (0.1 degree sensitive) in the thermowell. This sticking "fermometer" matched the thermowell as best as it could (+/- 2 degrees). That said, I checked but never found that the temperature in the bottle differs from the temperature at the rim even during active fermentation. If you don't need 0.1 degree accuracy (and you really don't), this will work. You can get it wet (e.g. when cleaning a bottle or bucket), but don't leave it wet for a long time. . Leaving it wet for too long (e.g. by submerging it in water or covering it with a wet towel in a swamp cooler) will damage it beyond repair. You can often find them for $4 at local brewery stores, which will also often give you an additional 10-15% discount if you're at a homebrew club or on sale. So $3.50 is a fair price; 5 dollars is not.