I agree - a low cost 3% accuracy instrument should be fine for tracking changes in humidity in a customer's home over time. For use in a customer's home, I would argue that it is the repeatability that is more important than the actual accuracy of the instrument. Sensor linearity is also important but no matter what the sensor make-up, all sensors start to become non-linear at the extreme ends of the scale (as has already been discussed). Practically speaking, you want to pay for an instrument with reasonable accuracy (3-5% full-scale) and even better repeatability (0.5 to 1% full-scale). An instrument at this level can be purchased in the $50 to $100 range. I don't see a need to purchase anything more expensive for use in tracking humidity levels in a customer's home. Corte Swearingen Chicago Richard Brekne <Richard.Brekne@gr To: Pianotech <pianotech@ptg.org> ieg.uib.no> cc: Sent by: Subject: Re: Zero percent humidity pianotech-bounces@ ptg.org 01/09/2004 05:15 AM Please respond to Pianotech Hi humidity freaks :) Just curious... shop use for building is one thing, but in advising customers at home, DC use, and other less critical applications... I generally just have one of those 5 dollar digi-hygrometers in my bag. Supposed to be good for +/- 3 % RH in the range of 23% to 90 %. I generally point out that anything under 30 % is just plain too dry, and anything over 70% is just plain to wet. Is there any reason for needing more accuracy in these kinds of instances that I should know about ? Cheers RicB Farrell wrote: > > What kind of an instrument are you using to measure RH @ less than 20%? > > Terry Farrell > _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
This PTG archive page provided courtesy of Moy Piano Service, LLC