4pcs Mini Hygrometer Thermometer Digital LCD Monitor Indoor/Outdoor Humidity Meter Gauge Temperature for Humidifiers Dehumidifiers Greenhouse Reptile Plant Humidor Fahrenheit(℉) or Celsius(℃) (White)
$9.99
Price: $9.99
(as of Oct 30, 2025 16:30:43 UTC – Details)
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Package Dimensions : 4.37 x 4.13 x 0.87 inches; 3.17 ounces
Item model number : ACEIRMC-4pcs Mini
Date First Available : July 24, 2021
Manufacturer : ACEIRMC
ASIN : B09B4Z4BW9
Best Sellers Rank: #113,012 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #235 in Indoor Thermometers
Customer Reviews: 4.0 4.0 out of 5 stars 94 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Mini round digital humidity thermometer allows you to easily know the environment temperature and humidity around you
Fahrenheit (°F) or Celsius (°C) conversion, this round thermometer displays temperature in Fahrenheit or Celsius (pressing the conversion button of ℃/℉)
Temperature measuring range: -58℉-158℉ (-50℃-70℃); Humidity measuring range: 20%-90%RH (Measures conditions every 10 seconds)
This portable hygrometer thermometer Measures Indoor humidity and temperature in time, help to adjust the humidifier, dehumidifier settings and humidistats, great for monitoring family’s living conditions and health by preventing colds, dry skin, asthma, mold.
Mini Hygrometer Thermometer Fahrenheit or Celsius Meter Digital LCD Monitor Indoor Room Round Humidity Temperature Gauge for Humidors Home Greenhouse Babyroom Reptile Incubator
Customers say
Customers find the humidity meter to be pretty good for the price. However, the accuracy receives mixed feedback, with some finding it very accurate while others report issues with temperature and humidity readings.
13 reviews for 4pcs Mini Hygrometer Thermometer Digital LCD Monitor Indoor/Outdoor Humidity Meter Gauge Temperature for Humidifiers Dehumidifiers Greenhouse Reptile Plant Humidor Fahrenheit(℉) or Celsius(℃) (White)
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aJayM –
Great use on 3D printer filament or humidor
This is a good device for monitoring temperature and/or humidity. I was surprised that they have improved over the old model even though they look the same. First, they added a power button where as the old one had a plastic sheet to keep the battery disconnected. Second thing is the improved accuracy. Actually I am not sure if this batch happened to be more accurate, but both temperature and humidity is right on the mark.
JJ –
Perfect for my AMS desiccant pods.
I picked this mini humidity and temperature gauge to keep tabs on my 3D printing environment, and itâs been perfect for the job. Itâs super compact and easy to place wherever you need it, and the digital display is clear and easy to read. Switching between Fahrenheit and Celsius is simple with the push of a button, which is a nice touch.The humidity and temperature readings seem accurate and update every 10 seconds, which is helpful for making quick adjustments to my setup when needed. Itâs made a noticeable difference in getting more consistent prints, especially in maintaining the right humidity for filament storage. Overall, a great little device that does exactly what I need for a very reasonable price!
Tom Ligon –
Very good at the price.
I needed an inexpensive digital thermometer that read C and could be mounted on a clipboard. I needed one for me, and three more for others in my citizen science team. These fit the bill. I don’t use the %RH reading but it compares pretty well with my lab meter. Temperatures are a bit off, about +/- 1 C from the lab instrument, but pretty good for the price. The response time is a little slower than I would like because the sensor is inside a plastic case, but settles in after a few minutes.
Sandy B –
Accurate.
Used them over time to compare the accuracy and consistency, and it always came out good. Happy with the product in that area, but it does NOT hang very well at all!
john reinert –
Donât work
Almost impossible to switch to temperature reading option. When you do it switches back. Three out of four inoperative since purchase. Purchased two packs of four, am now returning one pack. They are cheap but a waste of money. Did not last for two weeks. Upgrade your purchase!
Johny high –
Amazing
These little meters work amazing made some burping chambers for my flower and spot on will be buying moreThese lids sell online for 35 cost me 15 to build
Lisa –
Update review
This is a very accurate product. I give it a four because it rolls to the side.Update… I thought the numbers were showing correctly but they were not. I had to purchase others to compare. The temp is close but the humidity is way off! I almost liked my plays.
Tnert –
Consistency? Accuracy?
I guess it’s a good thing I got the 4 pack. At least I have 3 that appear to be working correctly.
Jean-Pierre Dorion –
L’affichage est clair et les 4 hygromètres affichent le même résultat même comparé avec un hygromètre/thermomètre plus sophistiqué.
tom –
Definitely not a super high quality item but decent for the price. After conducting a salt test on them none of them were off by more than 1-3%.
ColdCanadian –
Does not come with hydrometer/thermometer pictured
Xxx_montrealer –
So I have mixed feelings.The good:- Size: small and compact, it’s perfect for DIY projects and can be placed anywhere- Screen: simple, clear and effective- Shape: its round size can be ideal in some cases- DIY: for 3D printer enthusiasts, you can make your own shapes and place them just about anywhereThe less good:as you can see, we don’t always get the same value, even if 2 sensors are placed in the same spot.Temperature seems fine, but humidity levels can sometimes vary. Not dramatic, but in some cases you have to be careful.In any case, I find them well done and interesting.
raposo Benjamin –
1 of 4 look defect will do more testing but for the price it not bad