Humitect Card
Confirm for yourself that Condensation exists in your home

Each of these two styles of humidity indicators provide a quick and inexpensive means of checking relative humidity levels of rooms within your home. As humidity changes, the chemically impregnated spots change from blue (dry) to lavender (normal) to pink (humid). The standard card indicates the current humidity level and comes with a pressure sensitive backing. The temperature/humidity card comes with a pressure sensitive backing, and not only provides you with current humidity levels, but includes a temperature gauge in both Celcius and Fahrenheit scales.