Mr Distiller Starter Kit (2 Gallon) 
Description
Stick on Thermometer for Fermenter
Stick-On Thermometer. Temperature reading in both Fahrenheit and Celsius. Ranges from 39F/4C to 82F/28C. Works great on your plastic fermenter bucket and or carboys.
8am-4pm Mountain Time (Monday – Friday)
Gary Buechler –
Simple and accurate readings at a glance.
COWCOUNTRY1 –
Nice, keeps pretty close track on temperature. Can be used at the same level as your mash barrel rather than at 6 foot off the floor.
Scott Taylor –
Toddyw3 –
These work really great, you can adjust the room temperature for what works best during fermenting.