I'm just wondering if there is a difference between humidity and relative humidity? I have 2 digital thermometres/hygrometers in my incubator, I calibrated them both using the salt water method and they both read the same (they were out by 5% so both read 70%), but when I put them in the incubator - they both read very differently! One is at 50% and the other is at 20%. The one that reads 50% has RH written next to the reading so I figured that meant relative humidity where as the other one says nothing. So is there a difference? And which one should i be taking notice of? The one that reads 20% came with my Hovabator and is advertised as being very accurate. I want to get this sorted now before lock down so I can have the right humidity for hatching. Anyone with any idea - your thoughts would be greatly appreciated!