2 Pack Temperature Hygrometer Monitor, Indoor Thermometer and Humidity Sensor with App Notifications, Mini Bluetooth Thermometer Digital Device

I recently started using the Inkbird ITH-13-B Temperature & Humidity Monitor, and honestly, it’s become a subtle yet important part of my grow tent and bedrooms. Setup & App Experience: Straight out of the box, setup was smooth. The Bluetooth connection paired instantly and reliably. The app gives me real-time updates on temperature and humidity, complete with VPD and dew point tracking, which is more sophisticated than I expected at this price. Accuracy & Sensor Performance: The device uses Swiss-made Sensirion sensors, giving temperature readings accurate to ±0.2 °C (±0.36 °F) and humidity to within ±2%. I cross-checked it against another calibrated monitor, and it held up impressively well. Data & Historical Trends: This little unit stores up to 300 days of offline data and even allows you to export up to two years of historical insights, which is perfect for long-term tracking. Design: Physically, it’s compact with a clear display and gives you the flexibility of placing it on a desk or hanging it up. It fits almost anywhere. Connectivity Consideration: The only real catch is Bluetooth range can vary depending on walls or interference. While the spec says up to 230 ft (70 m) in open space, performance may dip in more complex environments. Just something to be aware of depending on where you put it. --- Final Thoughts: This monitor nails the essentials with excellent accuracy, seamless app integration, long battery life, and robust data tracking, all in a neat, unobtrusive package. Whether it's for growing spaces, baby rooms, or general home comfort, it delivers. Just keep placement in mind for Bluetooth signal strength.

I bought this mainly to use in the filament dryer of my 3D printer. I bought the two pack because I plan to leave one of them in the filament dryer permanently and the other can be used for other purposes. These come with the batteries already installed so you first have to pop off the back cover to remove a little plastic tab to allow the batteries to work. Once that is done, the display shows the temp and humidity levels. It first comes up in degrees C so you have to press the button on the top of the unit to change the display to F. Once I had the display set to degrees F, I compared the temp and humidity readings to the only other device I have in my house that can show temp and humidity which is an indoor display of my weather instruments and I was pleased to see that they were very close. When I looked at the second unit, the readings were different. I opened the Inkbird app on my phone and it instantly recognized the devices and it was able to display the readings from the sensors. It was through the app that I was able to calibrate the readings on the second sensor. I was also able to rename the sensors through the app so that I could more easily know which was which. I then placed one of the sensors outside and let it sit for a few minutes before I took a reading. I then compared this reading to the weather app on my phone and the readings were very close so it seems that these devices are accurate. The next test was to place one of the devices into my 3D Printer dryer box and take a reading. My 3D printer is in my hot Florida garage so knowing when to turn the filament dryer on is important to get good quality prints. It was 89.7 degrees and humidity of 60%. I turned on the filament dryer for two hours and the reading was 104.3 degrees and 43% humidity so that indicated that the filament had dried sufficiently to make some prints. I mounted the hygrometer to the dryer with a piece of double sided tape and it appears that I can leave it in there even while printed. I have done several prints since mounting it with no problems. I have placed the second unit in my attic because I want to get an idea of how hot it gets there so I can compare it to the temperature of the garage ceiling that I can measure with my Inkbird infrared thermometer. I can hopefully then decide if I should add more insulation. In summary I can say that this is a very good unit that can be used in a variety of situations and at a very good price.

If you’re a 3D printing enthusiast or professional, you know that filament storage is crucial for preserving the quality of your materials. Filament, especially types like PLA, ABS, and Nylon, is sensitive to humidity, and exposure to moisture can ruin its printability and strength. That's where the 2 Pack Temperature Hygrometer Monitor comes in—an effective and easy solution for monitoring the humidity in your 3D printing filament storage container. Design & Setup This product comes with two compact devices that are easy to place inside your filament storage box or drying cabinet. These hygrometers are small, but feature a clear digital display that shows both the temperature and humidity levels in real-time. The setup is simple—just pair each device with your smartphone via Bluetooth, and you’re ready to go. Key Features: Bluetooth Connectivity: The monitor pairs with your smartphone, sending real-time updates directly to your app. This ensures you’re always aware of the conditions inside your filament storage container, even when you're not physically near it. Accurate Measurement: The sensor is known for its accuracy in detecting small changes in humidity, which is essential for 3D printing materials, as even minor fluctuations can lead to filament degradation over time. Dual-Pack for Flexibility: With two units in the pack, you can monitor different compartments of your storage or use one for filament and the other for another 3D printing material or location. I personally use two of these monitors for my house and office at work, which adds extra versatility to how I can keep track of the environment in multiple locations.

This works really well and I love how small it is. It fits perfectly in the greenhouse without taking up too much space. Even though it is small, I am still able to read the temperature and humidity. I enjoy being able to use the app to see the temperature and humidity without having to go outside in the greenhouse. The one slight concern with this temperature gage is that the app doesn't work very well when things are blocking it. Overall I would say this is very easy to use and is worth it.

This is really a game changer. Bought for the sole purpose of monitoring temperature in my media center. With Bluetooth remote monitoring via app and better yet, mobile alert, I never have to worry about overheating again.

Got these to use with my reptiles to check on their temps while im at work. THESE DO NOT WORK LONG DISTANCE BECAUSE THEY REQUIRE BLUETOOTH. Seriously why would I need to check the temp/humidity remotely if I have to be in the house close enough for them to Bluetooth connect??? They work fine as normal hygrometers but for the price just get normal digital ones. No need for the smart technology.

I ordered two of these to monitor temp and humidity in two of my greenhouses. They work well, and for me, the battery life has been good so far. I have it set to update every 5 min and I check them often, especially when overnight temps are below freezing. I’ve had them over a month now and with the cheap batteries that were included , it’s still showing 70% roughly on both units. I have noticed when the temps drop below 50° the battery % reads lower then when it’s warmer. I do wish it was WiFi enabled rather than Bluetooth, there are times I’d like to check it when I’m not within range, but for now they are serving my needs. After relocating one so it’s more in the path of the heater, I can clearly see my heat on/off cycles

I got this to monitor the humidity in my basement. I put the other unit in the upper part of my house to compare. When side by side, the units were 1 degree and % off from each other. The unit I check more frequently (at least 1x daily, or more when I’m monitoring an issue) went thru the battery in about a month. The other unit is still on its original batteries. I was having a moisture issue in the basement, and really like being able to check the status without going down there. I have a dehumidifier and sump pump now, and this lets me confirm what’s happening down there when it rains a lot. I know it’ll be helpful during our humid summers, too. Knowing the average temps is helping me plan what I plan I can store down there, since the moisture is under control now. Having the other unit upstairs showed me it’s too moist up here (even in the winter), which I was not expecting. So I got a dehumidifier for the main house, too. I’m converting my screened in back porch to a greenhouse this summer, and I plan to move the house unit out there to monitor temps and moisture once it’s ready. Being able to check the status of a greenhouse without opening the door in winter is a necessity. I like the graphs and historical data in the app, esp when I’m trying to see how long the humidity was high, or how quickly it decreased. It’s also showing me some correlation between the humidity and the temperature.