A hydrometer is a must-have for your workspace. You must be able to know your temperature AND humidity levels to accurately use/choose your adhesive.
* Does not come with purple backing. This small gadget is designed to be placed as close to the adhesive you are working with as possible. Set it next to your jade stone or adhesive shield for the most accurate reading.
Hydrometer requires LR44 batteries. All Hydrometers come with a temporary display battery. Plan on buying batteries for this item.