Hygrothermograph | Datalogger | Aspirating Psychrometer | Hygrothermometer
Humidity Indicator Cards | Light Meter | UV Meter | Textile Fading Card
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| HUMIDITY INDICATOR CARDS | These cards offer a quick means of estimating the relative humidity levels. As the humidity increases or decreases, the chemically impregnated spots change from a blue color (damp) through a lavender (normal) to a pink (dry). These cards are placed throughout the stacks areas with the accompanying explanatory note. |
