The home type digital humidity meters should be fairly accurate for everyday
use. They are usually within about 5%. If you go to a professional unit
that is very expensive, they can be accurate to better than one percent.

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Jerry G.
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"John H" wrote in message
...
Does anyone know about the accuracy of electronic moisture meters. I have
just had double glazing installed and the sales person said I should get a
dehumidifier and moister meter. I have a hygrometer on an old barometer in
the hall.
John