Humidity Cards

Humidity indicator cards – a quick, inexpensive way to check relative humidity in storage or display areas.

• Chemically impregnated spots change from blue (dry) to lavender (normal) to pink (humid)
• Read the current humidity at the first blue (dry) section
• Reads 10%–100% RH
• Card size: 110 x 40 mm – pack of 5

For greater accuracy, we recommend a digital thermohygrometer.