The Antonki 2 Pack Digital Thermometer and Hygrometer gives you two compact monitors that display temperature and humidity on a large LCD screen. Each unit has a kickstand and built in magnets, so you can set it on a shelf or stick it to a metal surface, and the pair lets you compare two rooms or two growing areas at once.
It fits indoor growers, incubator and terrarium keepers, and homeowners who want simple climate readings without an app. These monitors are designed for indoor spaces and should be kept away from rain and standing water.
Specifications
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Quantity: 2 units per pack
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Temperature Range: -58 to 158°F (-50 to 70°C)
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Humidity Range: 10% to 99% RH
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Temperature Accuracy: ±2°F (±1°C)
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Humidity Accuracy: ±5% RH
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Sensors: Separate sensors for temperature and humidity
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Startup Time: Readings settle within 3 to 5 minutes after powering on
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Display: Large LCD with bold numbers, temperature shown to one decimal place
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Comfort Indicator: Face icon shows when humidity is in a comfortable range
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Units: Switchable between Fahrenheit and Celsius
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Power: CR2032 battery included in each unit, with an on and off switch
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Mounting: Fold out kickstand, built in magnets, and hanging option
Checking Temperature and Humidity in Plant Rooms, Seedling Shelves, and Incubators at a Glance
If you start transplants on seedling shelves, run plants under indoor lights, or keep eggs in an incubator, a pair of these lets you watch two spots at once and see which one is drifting. Put one on the top shelf and one near the floor to see how much warmer the air sits up high, or keep one in your plant room and one in the house to compare.
The humidity reading helps you decide when a space needs a dehumidifier or when air has gotten dry enough to stress young plants. The magnets let you stick a unit to a metal rack or cabinet without screws, and the kickstand holds it upright on a bench. With no app or pairing, you just walk past and read the screen.
What to Expect from the Antonki 2 Pack Digital Thermometer and Hygrometer in Real Use
Batteries come installed, so setup means pulling the tab and switching the unit on. The display blinks for up to three minutes while it settles. A unit that arrives hot or cold needs 10 minutes or more to match room conditions.
Once stabilized, purchasers comparing them against a professional hygrometer and a WiFi thermostat found readings within about 1 degree and 1% humidity. Others note quick response to changing conditions and nearly a year of trouble free use, including in an indoor grow space.
The large numbers are readable across a room, the kickstand sits without wobbling, and the magnets have held a unit securely inside a delivery truck box. There is no backlight, so the screen needs some room light to read. The two units can show slight differences when placed side by side, and humidity readings in a hot storage shed were questioned by a separate owner. These work best indoors and should stay out of rain.
Real-world performance notes sourced in part from verified Amazon customer purchases.
Frequently Asked Questions
Can you use the Antonki thermometer hygrometer outside?
No. The Antonki monitors are designed for indoor use and are not built to handle rain or getting wet. If you use one in a greenhouse, plant room, or outbuilding, place it where it will not be hit by misters, watering, or dripping condensation. For outdoor readings, you would need a thermometer rated for exterior conditions.
Why do two hygrometers show different readings in the same room?
Every hygrometer has a tolerance, and with these units that is ±2°F for temperature and ±5% for humidity, so two monitors can read slightly differently and both still be within spec. Readings also shift if one unit sits closer to a window, vent, or heat source. To compare them fairly, set both side by side away from drafts for about 30 minutes, then note any steady difference so you can account for it when you move them to separate locations.
Does the Antonki digital hygrometer have a backlight?
No. The display has no backlight, so you will need some light in the room to read it. The large, bold numbers are easy to see in normal room lighting or under grow lights, but in a dark tent or closet you may need to open it up or use a flashlight to check the screen.
