Eyelash Hygrometer with humidity & temperature display - BlackThe perfect tool to optimize your work environment! Temperature and humidity conditions directly affect the drying and curing speed of your favorite Lash Adhesives. Cyanoacrylate Adhesive requires humidity (RH) to dry; too much or too little humidity can affect the dry time. By reducing humidity, we can slow down dry times, or speed up the dry time by increasing humidity temperature Hygrometer measures temperature (in C or F) and humidity Displays 24