help choose hygrometer

[cloudff7ps1]

What are the best digital hygrometer brands? i have a chinese compact hygrometer and a xiaomi hygrometer both use CR2032 battery why some hygrometers use AAA battery?

I am looking for a good cheap and highly accurate hygrometer to measure the humidity in my room

these hygrometers that I have show 60% while my air dehumidifier shows 35% and I don't know what the truth is

 

[Ralston18]

Make and model humidifier?

Overall, it seems to me that it would be in the best interests of a dehumidifier to be indicating low humidity.

However the hygrometer question is not really a "Systems" question.

Moving thread to Opinions and Experiences.

That said, look for product reviews from credible sources.

For example:

https://www.weatherstationadvisor.com/best-hygrometer-reviews/

They have a buying guide.

 

[kanewolf]

What are the best digital hygrometer brands? i have a chinese compact hygrometer and a xiaomi hygrometer both use CR2032 battery why some hygrometers use AAA battery?

I am looking for a good cheap and highly accurate hygrometer to measure the humidity in my room

these hygrometers that I have show 60% while my air dehumidifier shows 35% and I don't know what the truth is

The best answer is the old analog method. Wet bulb / dry bulb thermometer plus a little math.
Cheap and highly accurate do not happen. Pick one or the other.