The Digital Thermo Hygrometer with Probe is a great addition to anybody’s grow room. It allows you to see both the temperature and humidity in your growing area at a glance. Having a probe, you can check these measurements without unzipping your tent and disturbing the plants. This has another benefit in that opening grow room doors tends to let air in which can change readings. This might lead you to think temperatures are fine when in fact they are too high. For best use, hang the meter itself outside the room and run the probe inside through a small opening. Ensure the probe is hanging in the middle of the plants middle to upper leaves. This is where all the action happens and where temperature and humidity is most critical


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