The IV:XX 420 HTC-2 Min Max Hygrometer with Probe 

This is a must-have accessory for your indoor growing spaces and grow rooms, featuring an extra probe enabling you to gather data and readings from two places at one time. Quickly and accurately measure both the temperature and humidity levels of your grow space and keep on top of your growing climate. The extra probe can also be used to measure the temperature of your nutrients and solutions, giving you data throughout the growing process. 

• Large display LCD screen

• Measure time, humidity and temperature

• Highly accurate

• Display temperature in both Celsius and Farenheit

• Built-in alarm