Veanic 4-Pack Mini Hygrometer Thermometer Fahrenheit or Celsius Meter Digital LCD Indoor Room Round Humidity Temperature Gauge for Humidors Home Greenhouse Babyroom Reptile Incubator

I use the Hygrometers for my Bambulab 3D Printers, to monitor humidity in the AMS and unlike the ones I had before , these working very accurately and also hold up well in regards to Battery.One thing that is a bit annoying is that they already on when they come, so there is no battery slip and you do not know how full/empty the battery still is, but as they use just small 2032 cells, as long they keep to be accurate, I can live with that!

Used on filament storage box. I left all 4 on the side next to each other and temperature wise, Fahrenheit and Celsius they were close to each other. Humidity wise one shows a higher reading. Bought a second set.

3 of these give the same reading for humidity but differ for temperature and the other one is 2% relative humidity out from the others but which one is correct?

As per the photo I've put all 4 next to each other all showing different temperature and only 2 showing same humidity. They've been sat out longer now and now a 6% humidity difference and 1.4°C difference, no good for relying on in an incubator which was our intention. They are easy to read and if you only wany it them for a rough guide of temperature and humidity they are OK for that.

Brought these to fit in my AMS (3D printer multi-filament unit) Not accurate, sent them back, all four had wildly different readings, an none where near my other humidity detector.

There crap they are not accurate at all the show completely different readings when there sat next to each other complete waste of money and definitely wouldn’t recommend them at all

My fault for not checking the size, but they’re tiny. Not convinced by accuracy at all - I have all four together and they’re giving different readings. Avoid!