If you're looking for a simple, yet accurate way to monitor the humidity in your humidor(s), then look into one or more of these. Xikar's PuroTemp Hygrometers are calibrated straight out of the box, so just install and enjoy. Made to Xikar's strict standards, they have long accuracy and require minimal maintenance.

XIKAR PuroTemp™ Hygrometer Features:

• Updated design with brushed aluminum for a more modern look and feel
• No calibration needed, guaranteed accuracy of +/- 2% RH right out of the box
• Read humidity in the range of 20% to 95%
• Register temperature in Fahrenheit and Celsius
• Temperature Range: 32 — 120 °F or 0 -50 °C
• Accuracy (Temp): +/- 1 degree
• Refresh rate: 10 seconds
• Magnetic attachment

Round Hygrometer:

• Measures 1.85" W x 0.5" D

Rectangular Hygrometer:

• Measures 2" H x 3.25" W x 0.375" D
• Min/ Max feature displays lowest minimum and highest maximum humidity recorded over the life of the battery or until reset.