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max
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 Posted: Thu Oct 02, 2008 6:54 am Post subject: What is this component? |
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What is this component?
http://i36.tinypic.com/2dkg7r7.jpg
http://i38.tinypic.com/2ppepeh.jpg
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Phil Allison
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| Posted: Thu Oct 02, 2008 12:38 pm Post subject: Re: What is this component? |
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"max"
[quote]What is this component?
http://i36.tinypic.com/2dkg7r7.jpg
http://i38.tinypic.com/2ppepeh.jpg
[/quote]
** Looks a lot like an "electrophoretic" elapsed time indicator.
A small DC current ( circa 1 uA) passes through the device causing a
coloured band to progress up the middle of the tube.
The scale divisions may be in hundreds or possibly thousands of hours.
Used to tell how many hours of operation a device has been subjected to -
they were readily available only a decade ago from Farnell et alia.
..... Phil |
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