Thlevel Digital Thermometer Hygrometer Temperature Humidity Meter Gauge for Greenhouse Cars Home Office 4PCS

Used one for a 3D printed desiccant holder for a Bambulab AMS the other two are really spares but I have put them in different rooms in the house. They didn't all give identical results next to each other but close enough to be OK for my purpose.

Purchased these as need one for my garage and thought why not put a couple around the house.6 Hours after been sat on the kitchen table and there is a slight variance, Most notably the white ones read lower than the black ones…. But for a couple of pound each as a indicative tool they are perfect.

It's a good alternative way to dry if you don't have a tent or room to use for drying.

it was quick, easy and simple to get it working. Works well.

No instructions came with the thermometers so we assume they are working - dunno🤷‍♀️. We bought them because we have been gifted a mushroom growing kit where the temperature of the environment requires monitoring and didn’t want to spend a lot on a thermometer. They are cheap and cheerful and it is not that essential that they are accurate for what we bought them for.

...scientific devices - they are small modules that look as if they were made to 'clip' into and become a part of another larger entity.Two of the four are white and two are black and sit quite comfortably on a flat surface. They screen is not illuminated and therefore it needs to be in a lit area to be easy to read the humidity % and the temperature [which is shown in Celsius].The device is set to measure once every 10 seconds and the seller clearly states the latitude of accuracy for both functions. My own tests show that putting all four together in one place will give readings within 1% to 3% for humidity and potentially 1 degree of temperature [which is acceptable given that there is no provision for any reading between whole numbers - so one unit may say 20 degrees when it's actually 20.4 degrees and the next unit might show 21 degrees when it's actually 20.8 degrees].The units run on 2 small and readily available button batteries and whilst there is no on/off switch they can be stopped by removing the batteries and replacing them when you want to use the device.I am quite taken with them and have ordered another set of 4 so clearly I recommend them for their simple but effective use.

Great little gadget and it is very small. It does the job well, though. The package came very quickly.

Small display but readable and their values seem to agree with our dehumidifier.