3 Pack Bluetooth Thermometer Hygrometer Sensors with App Alerts | -20°C to 60°C, 0 to 100% RH, 1-Second Updates, 50m Range, 100-Day Logging, CSV Export, for Wine Cellar, Greenhouse

Nothing to dislike about the device👌. It is small with a nice attachment loop for easy placement. And it worked straight out of the box. No complications. Once I downloaded the Android App, from Google, I calibrated this device with another of my thermometers/hygrometers that I know to be accurate and there was a little +/- needed on both the temperature (-0.2'C) and humidity (+0.5%). I have had this device for a week now and it has settled in, happily😎. The App is Bluetooth connected to the device and gives me all the information that I require. The temperature, the relative humidity, Vapour Density Pressure, a Mold Risk Warning, which thankfully has been 'Low' since I started my grow and is a handy extra bit of information to have to hand. The latter which I was not expecting but am pleasantly surprised about😲. Also, the data logger is very useful to see the history of the readings and can be exported to a pc. I reached out to Sensor Blue via email about part of the App screen not being visible on my phone and Sensor Blue responded promptly with their representative Zhao Kevin being very helpful. As it turns out it was a setting on my phone that needed adjusting. I had to adjust the "Display Size" in my phone settings and had nothing to do with the App👍 This is my very first grow of a plant that requires very specific conditions and this plant does not grow naturally in Ireland, the UK, and Europe and will suffer if not attended to properly. This Thermometer/hygrometer is perfect so far and is a great introduction to me being aware of the current conditions within my growing environment so that I can make environmental adjustments to grow plants happy and healthy🌱🪴 I recommend this device to anyone looking to be aware of their atmospheric conditions for whatever reason but for my purposes, it ticks all the boxes✅. The assistance from Sensor Blue via email was 5 Stars⭐⭐⭐⭐⭐ For this price, the device and accompanying App are outstanding value for the money. And the technical backup is excellent.😁😜🤩

Down load an application to work battery life is 100 days like it says, i have 3 so far and 2 are in areas were i getting mold, temperature & humidity records holding on device and using phone app you can export the full readings and back up the data, Bluetooth, location must be on to use. It shows a red dot when trying to find device, no sound to find them if you forget were you put, otherwise they are amazing and works well, for all areas and i can recommend this device 5 star rating.....

I have many makes of these & some drain the battery fast, others are good. They all work with the same APP. Nice if you want a log & can look up the temp on particular dates. Pity about the range & not working in a fridge. Some needed calibration, cannot ID the makers that are strange. Will update later

Great little bluetooth temperature and humidity monitoring & logging devices, with a user friendly App. I bought 3 at a very reasonable cost and I have had them monitoring for 40days logging their temperature and humidity every 10minutes without any issue. Their battery indicators show nearly full batteries (3/4) so I fully expect them to last several months before needing fresh batteries. Setting a less frequent logging interval may extend the battery life & vice-vesa. Logging every 10minutes indicates a 100 day rollover period, which I expect will decrease with more frequently logging & vice-versa. Data syncing to the App require reasonable close proximity to the devices and it can be a bit slow, but is normal for bluetooth radio. It can happily pass through both an external concrete and internal partition wall. Alarms can be set if the temperature or humidity falls outwith a set range, and the "Find It" feature is useful to both locate and identify individual units from each other. The App is very friendly and clearly shows the temperature and humidity by selected time period, and their distribution over time, and the logged data can easily be exported as CSV files and retained separately for long term analysis. Conclusion: I was pleasantly surprised by the devices which do exactly what they say they do, and do it very well. Update 1: 4 months use and the units are still working great with their batteries still showing good. Update 2: 11 x months and the 3 x units still working and batteries show half charge on the battery icon.🔋

I found this to be useless and a total waste of money. It has been wildly inaccurate from Day 1, especially for the relative humidity reading which is always way too high. See picture for comparison with two very cheap thermometer/hygrometers. The other two agreed that humidity was approx 60% whereas this one put it above 90% (it really wasn't, the air in the room felt pretty moderate). Even the temperature reading was 2 degrees Celsius higher than the consensus reading. It's a nice idea, it just doesn't work. The app is very straightforward to use, however, the data log is slow to sync and quickly gets too cumbersome to scroll through. It doesn't seem be possible to reset/clear the log after you export to laptop either, so this feature was basically useless after a few days. I'm surprised to see such a high product rating on Amazon, so maybe I just got a dud one, but at best this indicates inconsistent quality. Not worth the risk.

You could easily spend £50 on a sensor for a smartphone like this, but for nearly only a tenner, the first impressions are astonishingly great. Using it for a portable car cigarette lighter powered Halfords' cool box and the Bluetooth easily penetrates the box, plus to an upstairs room when prepping the box for travel. Some struggle with the App but I'm finding it a marvellous resource. °C or °F quick switch, easy pairing (major caveat below), graphical trends with scrolling or compacting to a single page. It updates virtually instantly when you go to the App, grey, then green when there's a ping of data. Range is really good and from 1 CR2032 100 days will be fine. Connecting and pairing to more than one smartphone is a brilliant feature, and the App can show you 100 or so devices' data... Incredible. The size is slightly unnerving, how is something this small so useful and advanced? I'm amazed. Most others need a hub to bring the days together, this just needs your phone or tablet, myself and partner have the App running so can monitor the cool box tomorrow... Will be invaluable. **Improvements** Minor: Make the App on PlayStore (Sensor Blue) the same name as when it's installed (ThermoPlus) so you can find it more easily on your device Major: my device needed me to open it up to allow it to pair, the connections to the battery weren't making a circuit, so needed to press either side, but letting go turned it off, so needed to put some cardboard inside to pad the space out to force a connection... This might affect the humidity readings, but not temperature which is the primary reason for buying it. Moderate: add a widget Moderate: offer battery life indicator (edit, it has one plus signal strength, my bad) Moderate: if reducing the ping frequency would increase battery life substantially, offer a way to reduce it Minor: show us the wi-fi version Moderate: offer a waterproof version, don't mind if only temperature not humidity is available. This will be so useful, will be only my imagination to see where to use them... Wireless view of a fridge 's temperature in the summer will be invaluable *Edit* we bought a new Bosch fridge freezer that has a metallic finish and the signal still pushes right through and even upstairs to the bedroom so we could gauge when it was ready after the first switch on. Continues to amaze 🤩

Not bad as a cheap means of knowing the approximate temperature, and just fine for my relatively simple need of knowing the trends. Easy to pair. Very simple app. Successfully located several heat leaks in my house using these. Unfortunately, four out of six have crapped out by eighteen months. Not run out of battery, but started seizing up and not logging data. For a couple weeks it still told me the immediate temperature, but ultimately they’re no longer running at all despite new batteries. If you only need it to work for a year or less, these can do the job. For longevity, go elsewhere.

initially i bought a 'tapo' sensor to fit with my existing ecosystem of smart lights. then discovered the tapo product then needs a 'hub' permanently plugged in. so sent that back ( thanks amazon) and tried this little trio of thermometers and loggers. well i'm blown away. the little 50p sized buttons can be dropped anywhere and whether inside or outside your bluetooth range, they continue to log data every 10 minutes. that data can then be grabbed when you're nearby and charted. the charting is easy on your phone, the management of logging is easy, they can be calibrated to 100th up or down, they are really sensitive to change, can export to Excel or csv. i cannot believe 20 quid buys 3 monitors like this where the software is good, the hardware seems good ( only had it a few days though) and even the packaging was minimal and only cardboard... kudos to the manufacturers here.

Assez précis t°et humidité. Syncro app rapide, mais dans application impossible de changer les intervalles de capture de données. Cela compte pour la durée de l accu.

Excellents capteurs de température qui me permet à distance sur mon téléphone la surveillance de la température du frigo, du congélateur et de l'habitacle du camping car lorsque je n'y suis pas.

Gadjet utile pour voir la température à l’endroit où l’on se trouve plutôt que de regarder une application fantaisiste …exemple qd on dit 10 degrés à Paris sur son Smartphone ….c’est à Notre Dame, à Montmartre, à Montparnasse …alors qu’avec ce produit on a la température de là où nous sommes …

I bought it to put inside my kwikpens pouch, to make sure they are always more or less at the right temperature whilst travelling. When I leave it the hotels fridge I can check the temperature on my phone, as well as the history from the past hours - a complete peace of mind! ABSOLUTELY LOVE IT.

Buon prodotto, io lo uso per misurare l'umidità e la temperatura nell'incubatrice. E' preciso e valido anche per misure dentro il frigorifero. L'app funziona bene a distanza ravvicinata (4-5m),campiona i valori costantemente ottenendo dei grafici. Tenete presente che il prodotto è fatto per misurare ambienti domestici interni ed ha una risposta piuttosto lenta, se si cambia ambiente o posizione del sensore occorre attendere almeno mezz'ora per avere misure attendibili.