Humidifier In Workshop--Hardwoods

[Mikegtr]

I have a small workshop--interests: luthiery--using hardwoods. Can you recommend an accurate hygrometer? I have done a search and there are quite a few to choose from. Cheap to expensive. Digital to dial reading. Some more accurate than others.
What do you use that gives a reliable reading?

 

[Ttrees]

Most of the fancy pants on the OLF use the Abbeon.