Indoor and outdoor thermometers, and hygrometers, which measure temperature and humidity. Climate control is an important factor for a healthy and productive growing environment.
$13.99Active Air Indoor-Outdoor Thermometer with Hygrometer
$14.99Active Air Hygro-Thermometer - HGIOHTJ
$26.99Grower's Edge Digital Thermometer and Hygrometer Large screen digit...
$16.50EcoPlus Wireless Remote Sensor Model 716557 Wireless Sensor - For u...