Hydrometer recalibration

ronte94

Hey so I wanted to make sure my hydrometer was reading accurately so I decided to recalibrate it. I was wondering if I could perform the salt test method but substitute the salt solution with propylene glycol solution and humidifier. My propylene glycol solution is supposed to maintain a 70% humidity.

Lee.mcglynn

I would use the salt test....if your confident enough with the pg solution maintaining 70rh then there would be no need to calibrate

webmost

Should it need re-calibration after initial calibration? Mine was WAY off, along the order of 35%, when I got it. Set it straight with salt. Do they go wonky over time once set into use?

beatnic

jgibv

Gray4lines

My hygrometers just have a "calibrate" button that sets them at 75%, so the only way to go is a salt test. I can usually tell when they are reading off, and redo the salt test. Probably about every 6 mo or so for me too.

webmost

Lee.mcglynn

Just my 2cents but if you use boveda or heartfelt your pretty much in the clear and don't even really need the hygro.... I use mine just to check the temp

Rhamlin

Just run the salt test. If its a digital and the batteries are still good chances are it'll be spot on if you calibrated correctly. I've retested mine a time or two and it always has come out at 75%

kuzi16