Active Air Indoor-Outdoor Thermometer w/Hygrometer

Dual-Zone Temperature and Humidity Monitor with Remote Probe

Tracking conditions in a grow room usually means knowing what is happening in more than one spot at once, and a single-point thermometer only shows one of those readings at a time. This Active Air thermometer and hygrometer pairs a large, easy-to-read display with a 3-meter remote probe, so a second temperature reading can be sampled from elsewhere in the room or outdoors.

The unit also records high and low points for both temperature and humidity, and includes a 12/24-hour alarm clock function, so it doubles as a general-purpose grow room monitoring tool.

Key Features & Benefits

• Large Display — Reads current temperature and humidity levels at a glance.
• 3-Meter Remote Probe — Samples a second temperature reading from up to 3 meters away.
• High/Low Recording — Records high and low points for both temperature and humidity.
• 12/24-Hour Alarm Clock — Includes an alarm clock function set at 12 or 24 hour intervals.

Who Should Use This Thermometer

Growers who want to compare conditions in two locations at once, such as inside and outside a grow room, will find the remote probe useful for monitoring both simultaneously.

About Active Air

Active Air is Hydrofarm's environmental-monitoring and ventilation-accessory line, covering thermometers, hygrometers, and related grow room climate hardware.

Frequently Asked Questions

How far does the remote probe reach?

The remote probe can be placed up to 3 meters from the main display unit. This makes it useful for comparing a second location, such as outside a grow tent, without needing a second thermometer.

Does this unit record temperature history?

Yes, it records high and low points for both temperature and humidity rather than only showing the current reading. That history makes it easier to spot swings that a single glance at the display would miss.

When would I use the remote probe instead of just the main sensor?

Use the remote probe whenever you want a second reading from a different location, such as comparing indoor and outdoor conditions or checking a second room. The main unit still gives you the primary reading at the same time.

Does this thermometer include an alarm?

Yes, it includes a 12/24-hour alarm clock function in addition to its temperature and humidity monitoring. This adds a general-purpose clock feature alongside the climate readings.

Can this be used outdoors?

Yes, the unit and its remote probe are built to handle indoor and outdoor placement, which is part of what makes the dual-zone reading useful. Extreme weather exposure should still be considered when choosing a mounting spot.