Thermometer and hygrometer accurately measure temperature and humidity Easily monitor your reptile habitat conditions Temperature and humidity are key to herp health, so mounting a thermometer and hygrometer in each terrarium is essential for accurately monitoring your terrarium conditions. Thermometer measures from 0 to 120F (from -20 to +50 C), displaying temperatures in easy-to-understand colored zones. Hygrometer accurately reads the water vapor saturation in the air, with a scale from 0 to 100 percent. Self-adhesive backing included on each. 1-3/4" diameter.

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