On Wednesday, December 30, 2015 at 2:04:12 AM UTC-5, Micky wrote:
On Sun, 27 Dec 2015 14:33:56 -0700, Don Y
wrote:

On 12/27/2015 10:49 AM, Vic Smith wrote:
On Sun, 27 Dec 2015 07:49:30 -0700, Don Y

I'm not interested in personal comfort as much
as having "real data" for the HVAC system and
to know whether the citrus trees are in jeopardy.

E.g., Mandarins get upset at 32 (not 30 or 34)
but Navels will tolerate 28 (but not 26). The
mechanisms used to protect them usually only afford
a couple (3 or 4?) degrees of added protection -- but,
only when you *know* they need to be used.

In that case you need the sensors at the trees.

Trees are within 10-20 feet of the house. So, there's
likely no difference in temperatures there vs here
IN THE ABSENCE OF MAN-MADE INFLUENCES.

Locating them at/in the trees would expose them to the
daytime sun.

Not if you put a little awning over them.

IIUC white on the top and black on the bottom, but any color will do
most of it.

The only diff. between the shady side of the house and the sunny side
is the shade!!


Not true.

The sun can heat up the surrounding area and surfaces and well as cause
evaporation, completely changing the "local" climate.

A "little awning" over a sensor to protect it from the sun is not going
to completely compensate for the temperature difference caused by the sun's
influence on the surrounding area.

Try a protected sensor over a sun drenched blacktop driveway and a protected
sensor over a sun drenched lawn or even a sun drenched pond. Tell me if
they report the same temperature.