Temperature and humidity affect how your adhesive performs. This compact digital meter displays the current temperature in Fahrenheit, relative humidity percentage, and time on one easy-to-read screen. Set it on your workstation and know instantly whether your environment is in the right range for clean, reliable rhinestone bonds.Adhesives like Fusion Tack and epoxy cure differently depending on heat and moisture levels. Too humid, and your glue may not set properly. Too cold, and cure times get longer. This little meter takes the guesswork out of your workspace conditions so you can adjust before you start a project, not after stones start falling off.At $3.95 (67% off), it is one of the cheapest tools that can make one of the biggest differences in your finished work. Every serious rhinestone artist should have one at their workstation.