Did you know that 40-60% RH is the perfect humidity range for human health and process manufacturing. Regulating humidity levels at 40-60% helps reduce the spread of influenza, hydrates the air, lowers electrostatic discharge and provides free cooling. Do you know what your RH is? Get your FREE desktop hygrometer to monitor humidity in the air. Our mini hygrometer is discrete at only 2 inches and perfect for your office, production facility, retail space or home.