Hi A multi mode resonant cavity is probably the “easy” approach. Like the waveguide, it is pressure / temperature / humidity sensitive. The same “can I separate the effects” issue applies.
Any enclosed device will have issues with properly representing the humidity in the room. It’s fortunate that the control goal is 50%+/- 30%. Fancy monitors are not required ... Bob > On Oct 31, 2016, at 6:17 AM, Dr. David Kirkby (Kirkby Microwave Ltd) > <[email protected]> wrote: > > On 31 Oct 2016 06:07, "Poul-Henning Kamp" <[email protected]> wrote: >> >> -------- >> In message < > canx10hcpa5sozukqe00c5hcm-zrwkblnsojcoljokdriols...@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. > > I have not looked at any of the papers someone have a link to, but I would > imagine one problem would be there's litter airflow in the waveguide, so > it would be very slow to respond. > > Dave > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
