[TheForge] Way OT -- remote thermometer for river water

[Daniel T Hayes]

Bruce,

Interesting question, interesting enough to make me take my Cen-Tech Laser
Infrared Thermometer (also from Harbor Freight,  #96451) out and try it on
the swimming pool. The reading aimed at the water matched the pool
thermometer within three degrees.

Keep in mind that any of these devices need "calibrated" if you are really
interested in the precise true temperature. I have mine for checking welding
preheat temperature. It's off a bit (as determined by a calibrated contact
thermocouple setup) but consistently so at any given temperature. Much more
convenient.

I think a HF infrared pyrometer would work very well for what you have in
mind.

Dan

-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Bruce Freeman
Sent: Friday, April 22, 2011 1:24 PM
To: Blacksmithing List Sponsored by ABANA
Subject: [TheForge] Way OT -- remote thermometer for river water

I'm tapping the diverse knowledge of this group for a product I need.

I want to measure the temperature of the water in small rivers.  Purpose -
kayaking.  I could get right up to some of these and just stick a
thermometer in them, but in most cases it would be a lot more convenient to
drop a probe in from a bridge -- maybe 20' maximum distance.  But I can't
just drop a thermometer into the water and pull it out from 20' above and
get a reading -- the reading would change by the time I read it.

If they'd work, I could use a remote thermometer like this one --
http://www.harborfreight.com/non-contact-pocket-thermometer-93983.html  But
I don't know WHAT temperature I'd be measuring just pointing a device at a
river.

Any thoughts as to what might work well for such an application?  I'd need
accuracy within 2* or 3*F, nothing precision.

--
Bruce
NJ
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