Re: [time-nuts] What do people use for measuring temperature?
On Fri, 25 Sep 2020 22:46:32 -0400, time-nuts-request@lists.febo.com
wrote: Re: time-nuts Digest, Vol 194, Issue 40
Message: 8
Date: Fri, 25 Sep 2020 04:50:35 -0700
From: Hal Murray hmurray@megapathdsl.net
To: time-nuts@lists.febo.com
Cc: Hal Murray hmurray@megapathdsl.net
Subject: [time-nuts] What do people use for measuring temperature?
Message-ID:
20200925115035.504AF40605C@ip-64-139-1-69.sjc.megapath.net
Content-Type: text/plain; charset=us-ascii
I've got a collection of 1-wire gizmos and USB thumb drives. They
are great
for many applications but I'm looking for something better/different.
I'd like something that reads to 0.01 degree or 0.001 degree. I don't need
accuracy. What I want is reasonable linearity so I can make pretty graphs.
I'd like the actual probe to be small enough so I can poke it
inside gear like
a PC and attach it to a crystal.
I'm looking for a USB or serial connection so I can log the data.
Is there an obvious brand/whatever I should be looking at? thermistor?
thermocouple? ...
I don't care about a display on the device. I don't want a logger,
they fill
up. I want to grab the data on the fly and do my own logging.
(But I'm happy
to use a logger if it will do what I want.)
Sounds like you need a Platinum RTD (Resistance Temperature Detector)
unit of some kind. Don't be scared by the word Platinum - these need
not be terribly expensive, and are widely used in industry.
These are industrial:
.https://www.omega.com/en-us/resources/rtd-hub
Many bench DMMs have a RTD input.
Joe Gwinn
Hi
One interesting “oops” using RTD’s:
They are close cousins of strain gauges. Some RTD designs are very close.
Mount them to this or that and they may tell you more about the stress / strain
in the mount than about the temperature.
You do not want to know how many (hundred) temperature test chamber sensors
that particular goof messed up …… 4 sensors per chamber, 8 in a pod, three pods
in the factory here, four pods in the factory down south, Two partials in engineering,
two partials in QA ….
The answer ultimately was to tear out all the RTD’s and replace them with carefully
tested (= sorted) AD590’s.
Bob
On Sep 26, 2020, at 10:48 AM, Joseph Gwinn joegwinn@comcast.net wrote:
On Fri, 25 Sep 2020 22:46:32 -0400, time-nuts-request@lists.febo.com
wrote: Re: time-nuts Digest, Vol 194, Issue 40
Message: 8
Date: Fri, 25 Sep 2020 04:50:35 -0700
From: Hal Murray hmurray@megapathdsl.net
To: time-nuts@lists.febo.com
Cc: Hal Murray hmurray@megapathdsl.net
Subject: [time-nuts] What do people use for measuring temperature?
Message-ID:
20200925115035.504AF40605C@ip-64-139-1-69.sjc.megapath.net
Content-Type: text/plain; charset=us-ascii
I've got a collection of 1-wire gizmos and USB thumb drives. They
are great
for many applications but I'm looking for something better/different.
I'd like something that reads to 0.01 degree or 0.001 degree. I don't need
accuracy. What I want is reasonable linearity so I can make pretty graphs.
I'd like the actual probe to be small enough so I can poke it
inside gear like
a PC and attach it to a crystal.
I'm looking for a USB or serial connection so I can log the data.
Is there an obvious brand/whatever I should be looking at? thermistor?
thermocouple? ...
I don't care about a display on the device. I don't want a logger,
they fill
up. I want to grab the data on the fly and do my own logging.
(But I'm happy
to use a logger if it will do what I want.)
Sounds like you need a Platinum RTD (Resistance Temperature Detector)
unit of some kind. Don't be scared by the word Platinum - these need
not be terribly expensive, and are widely used in industry.
These are industrial:
.https://www.omega.com/en-us/resources/rtd-hub
Many bench DMMs have a RTD input.
Joe Gwinn
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