wafer hygrometers?

[birdbrain5]

i have two digital and one wafer, every one of them reads different so im going to calibrate them all again and write on them the difference so i can keep track better for next hatch. can i calibrate a wafer hygrometer? also, i have read they usually read what theyre going to read after 8 hours, and you dont have to wait the full 24, is that true?

 

[birdbrain5]

this thread got lost, hoping someone out there can give some advice...?

 

[rebelcowboysnb]

I dont know what a wafer hydrometer is but here is my page an video on calibrating hydrometers. http://cmfarm.us/HygrometerCalibration.html

 

[birdbrain5]

its a hygrometer i got in the reptile section for the humidity, but its not digital its like the wafer style. i wasnt sure if i could calibrate it the same as a digital with the salt water

 

[rebelcowboysnb]

The wet salt works on both. With most of the analog ones there is a adjustment screw in the back so you can move the needle to 75%.