NIST-traceable hygrometers are readily available in the $200-$400 range. Or you can get a couple of airtight boxes of precisely the same volume and go gravimetric.......................
On Thu, Oct 27, 2016 at 9:43 AM, Ron Bean <[email protected]> wrote: > >* You cannot "feel" absolute humidity, always measure it. > > And since this is time-nuts: Measuring humidity accurately is tricky. > According to people who have tested them, commercial electronic humidity > sensors, when tested in a lab, have never come anywhere close to the > accuracy claimed in the data sheet. The best you can hope for is > consistent readings, not absolute accuracy. > > The exception is the "cold mirror" type of sensor, which measures the > dewpoint by cooling a mirror and bouncing a light off it to sense the > temperature where dew condenses on it. Those are expensive, and they > require maintenance to keep the mirror clean. > > BTW some of us are more sensitive to humidity than others. I can't tell > you the RH of a room, but I can tell you when it's too dry for comfort. > I want it as close to 50% as I can get it without growing mold on the > walls. Some "experts" claim that 30% is good enough for anyone, but > they're wrong. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Intelligence has never been proof against stupidity. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
