– Thlevel Mini Hydrometer Humidity Meter Small Digital Room Thermometer Temperature Monitor for Greenhouse Home Office 6 Pack

These are very small and designed to fit into a panel hole, however they stand on a flat surface fine. I was primarily interested in using them in my 3d printer filament container. They work well in this context. They all showed the same reading when together +/- 2%. Some other reviewers said they didn’t, but these were good. Great price as well. They do come with the batteries activated, but that’s not really an issue.

These temperature / hygrometer units came ready to use with batteries, there are no buttons, switches or any settings to configure. The display shows the current humidity and temperature reading in degrees Celsius and updates the readout roughly every 10 seconds. The units are very compact, about the size of a 9V battery. They appear to be designed to slot into something, like a cabinet or container to monitor the interior temperature / humidity, however they sit fine on their own standing up. I placed these in different rooms, each on top of a door frame as shown. They will also sit neatly along the edge of a shelf. Although the display does not light up, they are clearly readable even in low light, particularly the large humidity reading digits. The readings appear to be accurate with the 6 pack I received all being within 1 to 2% of each other for the humidity and within 0.5C for the temperature as shown. The only feature I wish they had is a Min / Max reading like some other hygrometers, but for the price they are great value for monitoring the humidity around the house, such as to see how well a centrally positioned dehumidifier is at tackling the humidity in each room.

They are small, very small, but great for the price. Just don't expect it to be accurate .... all 3 next to each other shows slightly different. My branded dehumidifier shows significantly different humidity level, sometimes ~10-20%. But great to give an indication about humidity level. After taking shower - shows 99% humidity :)))))

Reads the humidity in my dry box perfectly and pretty accurately, will buy again when i need more for this same use!

These are good value and work straight from the box and you get three. On the not so good side, they are tiny, the larger display is the condensation not the temperature, and given the size and these tired old eyes of mine, means glasses are required to read temperature. They are very light and cheap feeling but then they are cheap so you can't blame for that.

Cheap and cheerful, shame they come with the batteries already activated. I can't say how accurate they are as I have nothing to compare them to that is calibrated. They do show consistent readings across all three though so that's a good sign. Purchased to show humidity levels in filament boxes so I'm only really interested in the reduction, not whether they are correct.

This has been soo useful as a new mom in the winter season.

They're pretty dinky, smaller than I expected anyway. Think half a matchbox size. Placed them all together in one room and got different readings on all three, in total were about 1.4 degrees C out from each other. Humidity seems accurate as it shoots up when the dryer is on, and down once the back door is open. Hard to read unless you're looking face on to them, any angle and you just see all the lines. Does it job to some degree, albeit accuracy isn't 100%, but can't expect perfection for the price.

Bought this set for my 3d printing filaments, i have 2 in a storage box and 1 in the sunlu dryer. when left outside the boxes the difference of measurement is very subtle. would definatly recommend

Połowa przestała działać po ledwo 5 miesiącach (ekran nie wyświetla wszystkich cyfr/znaków poprawnie).

Petits, pas chers et fiables. Je recommande.

Gia' acquistati una volta e mi hanno completamente soddisfatta. Li ho ricomprati per la casa delle vacanze dove scendiamo anche all'interno a temperature basse. Confermo quanto già scritto nella precedente recensione: funzionali, precisi e piccolini. Proprio quest'ultimo è un loro punto di forza infatti non ingombrano e non si "notano". Le batterie con cui vengono venduti sono "durevolissime": devo ancora sostituirle ai primi!

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