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Active Air Indoor-Outdoor Thermometer w/Hygrometer

$25.19 USD
  • 3-meter remote probe for dual-zone temperature tracking
  • Onboard sensor monitors immediate room temperature and humidity
  • Integrated 12-hour and 24-hour alarm clock for scheduling
  • 1-year warranty against defects in materials and workmanship
  • View More Details

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  • Free Shipping On Most Items*To the lower 48
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THROUGH THE Cultivator's LENS Product Evaluation

  • You are looking to streamline your climate management because managing two separate zones with individual meters creates unnecessary clutter and oversight gaps.
  • You are tracking environmental extremes in your grow area because you need visibility into overnight conditions without having to be there in person.

  • The 3-meter remote probe lets you keep the main display on the wall while monitoring a separate tent interior.
  • The memory function logs your high and low points, so you can check your nighttime swings during your first morning visit.
  • The large display shows your readings at once, which makes it easier to check your status from across the room.

  • Growers who consolidated their zone monitoring say they spend less time jumping between different meters to verify conditions.
  • Users who rely on the memory function say they no longer wonder about temperature spikes during lights-off cycles.

Active Air Indoor-Outdoor Thermometer w/Hygrometer

Managing two environmental zones — a grow tent and the surrounding room, or two separate grow spaces — typically means two separate meters. The Active Air Indoor-Outdoor Thermometer w/Hygrometer consolidates both into a single compact unit, using a 3-meter remote probe to capture temperature in one location while the onboard sensor monitors the immediate environment. Pairing this monitoring tool with an Active Air 10" Inline Duct Fan - 760 CFM ensures you can act on the temperature data by exhausting excess heat from the tent. Current temperature and humidity display simultaneously, with Max and Min memory recording the extreme values for both metrics so you can review overnight or lights-off conditions without being present.

Built from sturdy materials suited to the demands of a grow room environment, the unit adds an alarm clock function with both 12-hour and 24-hour modes — a practical addition for growers managing timed feeding, lighting checks, or harvest schedules. The large display keeps all readings readable at a glance, and at under 0.3 lbs, it's light enough to move wherever your monitoring needs take it. For growers also monitoring root zone conditions, this device complements the Active Air 3-Way Meter for a comprehensive environmental overview.

Features

🌡️
Dual-Zone Temperature Monitoring

Monitors two temperature locations simultaneously — the onboard sensor covers the immediate area while the 3-meter remote probe reaches a tent interior, canopy level, or separate room.

💧
Onboard Humidity Sensor

Relative humidity sensor is built into the side of the unit for continuous indoor RH monitoring alongside temperature — no separate hygrometer needed. It provides the data necessary to determine if you need to activate an Active Air Commercial Humidifier - 75 Pint to increase moisture levels.

📏
3-Meter Remote Probe

The 3-meter temperature probe reaches into grow tents, behind equipment, or into adjacent spaces while keeping the display unit in a convenient, visible location.

📊
Max & Min Memory

Records high and low points for both temperature and humidity, letting you review environmental extremes from lights-off periods or overnight without manual monitoring.

⏰
12/24-Hour Alarm Clock

Built-in alarm clock with selectable 12 or 24-hour display — useful for scheduled feeding reminders, lighting checks, or any time-sensitive grow room tasks.

🖥️
Large Display

Spacious screen displays current temperature and humidity readings in a large, easy-to-read format — all key data visible at a glance from across the room.

Specifications

Specification Value
Readings Temperature (indoor & outdoor), Relative Humidity
Humidity Sensor Location Side of unit (onboard)
Remote Probe Cable Length 3 meters (temperature only)
Memory Max & Min (temperature and humidity)
Alarm Clock 12-hour and 24-hour modes
Dimensions (Unit) 8.8" L × 3.8" W × 0.7" H
Shipping Weight 0.29 lbs.

Warranty

The Active Air Indoor-Outdoor Thermometer w/Hygrometer is backed by a 1-year manufacturer warranty against defects in materials and workmanship.

FAQ

What is the difference between this unit and the Active Air Hygro-Thermometer? +

Both units monitor temperature and humidity with a 3-meter remote probe and Max/Min memory. The Indoor-Outdoor Thermometer w/Hygrometer adds a built-in alarm clock function with 12/24-hour modes, making it the better choice if you want a single device that also handles grow room scheduling reminders. The Active Air Hygro-Thermometer focuses purely on environmental monitoring without the alarm feature.

Does the remote probe also measure humidity, or just temperature? +

The 3-meter remote probe measures temperature only. Humidity is measured by the onboard sensor located on the side of the unit. This means for humidity readings, the unit itself needs to be positioned in the zone you want to monitor — while the probe can independently capture temperature from a separate remote location.

How does the Max/Min memory help with grow room management? +

The Max/Min function records the highest and lowest values reached for both temperature and humidity since the last reset. This is invaluable for identifying overnight temperature drops during lights-off, humidity spikes after watering, or heat buildup during peak lighting hours — conditions you may not be present to observe in real time.

How do I use the alarm clock function? +

The alarm clock supports both 12-hour and 24-hour time formats. Setup and alarm programming instructions are covered in the included instruction manual, linked in the Support & Manuals section above. The alarm is useful for scheduling feeding intervals, reminding you to check on plants, or flagging the end of a treatment period.

Where should I position the unit and probe in my grow tent setup? +

A common configuration is to place the unit outside the tent — on a shelf or wall nearby — and route the 3-meter probe through a vent opening or Active Air Premium Ducting - 6" x 25' to sit at canopy level inside. This gives you canopy-level temperature from the probe and ambient room humidity and temperature from the onboard sensors, covering both zones without opening the tent for readings.

Can this thermometer be wall-mounted? +

At 0.7" depth and under 0.3 lbs, the unit is well suited for wall mounting in addition to freestanding use. Wall mounting keeps it at eye level in a fixed position, freeing up shelf and workspace while keeping environmental readings continuously visible. Refer to the instruction manual for mounting hardware details.

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