On Thu, 31 Dec 2015 04:59:30 -0800 (PST), DerbyDad03
wrote:

On Thursday, December 31, 2015 at 5:21:11 AM UTC-5, Micky wrote:
On Wed, 30 Dec 2015 07:32:46 -0800 (PST), DerbyDad03
wrote:

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.

True.

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

But then if that is happening near the tree, that is the temperature
near the tree.

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.

The goal IS to measure the temperature of the surrounding area. All
the awning is for is to keep the direct sunlight from making the
thermometer too hot, as in Don's example of it reading 20 degrees
higher after he carried it in the bright sun for 20 feet.

Try a protected sensor over a sun drenched blacktop driveway and a protected

With the driveway you'd probably have to protect it from heat
radiating from the blacktop. I assume his trees are planted in the
middle of a grassy area, or an area with other vegatation.

sensor over a sun drenched lawn or even a sun drenched pond. Tell me if
they report the same temperature.

Of course not but it doesn't matter. The goal is to measure the
temperature by the trees, which is why you put the thermometer(s) by
the trees.

I was simply responding to your comment that the only difference between sun
and shade is the shade. Even you seem to agree that that is not correct, based
on your latest response.

No, I don't, but I'll grant that part is a matter of opinion.