The Hydrion Humidicator Test Paper is easily positioned on a wall, in a chamber or container, and may be left for protracted monitering for up to 7 days, and there is sufficient paper for more than 200 test strips in the dispensor. The paper may be used to demonstrate the need for dehumidifiers in homes, offices, or storage areas considered at risk for high humidity. With the use of appropriate tables, the paper can be used to estimate the dew point or frost point.