Hello Chris,

the best description of resistive sensors ive found:
http://www.figarosensor.com/details.html

from what they say, i think the problem is that the sensor
gets irreversibly poisoned over time, mainly with silicone-
type substances (*) (not the same as silicon, BTW).
basically, the more silicone around, the faster it dies.
using a silicone lube around these sensors sounds like the
kiss of death to me.

my impression is that its better not to get too emotionally
attached to this type of sensor.

alice
(*)Silicones are polymers in which organics groups, such as
methyl and phenyl groups are bonded to the silicone
     atoms in chains of inorganic siloxanes (-Si-O-Si-).
Possessing a host of unique properties including heat, cold
and
     wheather resistance, electrical insulation, release,
water repellency and defoaming properties, silicones are used
     throughout the following industries:
>
>
>  In an earlier thread a remark was made that the Dew Detectors fitted to
>  VCR's went high resistance over a period of time causing the dew detector
> to
>  come on permanently.
>
>  I took the opportunity to check this with a colleague who repairs VCR's for
>  a living and he expressed surprise as he could count the failures of this
>  type on the fingers of one hand. As far as he could remember this problem
>  only affected ancient recorders such as my Panasonic NV7000 (Duh).
>
>  This got me thinking that perhaps the reliability of these devices is
>  affected by climatic conditions and the UK is a benign climate as far as
>  these devices is concerned.
>
>  Anyone care to comment ?
>
>  Regards
>
>  Chris
>
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>
>

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