--------
In message 
<CANX10hCrGmtUuO+uX=vturhtiztpzhk8vz0kybfiq1fq-wr...@mail.gmail.com>, "Dr. 
David K
irkby (Kirkby Microwave Ltd)" writes:

>> > [...] so it might be a relatively cheap way to measure humidity.
>>
>> 80m wave-guide is neither cheap, nor in most circumstances, practical :-)
>
>But you don't need 80 m of waveguide. 100 mm or so would be sufficient.

Then it would require a quite high frequency...

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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Never attribute to malice what can adequately be explained by incompetence.
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