Allan wrote:
>
> Hi Roman,
> do those dew sensors measure RH or condensed moisture (wet tape)?
> Allan

They appear to be printed substrate on a small
ceramic plate about 8mm square. The resistance
varies depending on how much moisture in the air,
ie breathing on it changes the resistance. They
are mounted near the head drum on a vertical metal
plate on most older VCRs. The National/Panasonic
ones are notorious for going off value and causing
the dew indicator fault in VCRs about 12-15 years
old. The Sharp ones seem to be more reliable. :o)
-Roman

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