Maximum Humidity Indicator Cards (5-Pack)

Place these Maximum Humidity Indicator Cards (5-Pack) in display or storage areas to monitor relative humidity (RH) levels. The colored squares respond to moisture in the air by changing color, with the break between pink and blue squares showing the current RH. The cards also feature a unique blue-crystal visual alarm system that changes color if the humidity reaches 50–90%.

• Monitors humidity in display or storage areas
• Each colored square in the scale indicates a 10% humidity range, from dry to damp
• Irreversible blue-crystal visual alarm system changes color if the RH reaches 50–90%
• To use, simply place in area to be monitored
• Do not place near air vents or windows as this may skew readings