How to measure humidity?

[Clsikes]

I just got a new Hovabator, model 2362, and it does not have anything to check the humidity with. Is this something extra you have to order, and if so, what is it called?

 

[Granny Hatchet]

yes, you have to buy it extra. i went to lowes in the garden section and bought a temp/ hygrometer. hydrometer.i THINK they are both the same thing. it was 8 dollars.

 

[mortie]

I already had a really accurate thermometer so I bought a hygrometer at petco for $5