[time-nuts] Temperature (environmental) sensors

Scott Stobbe scott.j.stobbe at gmail.com
Tue Jan 3 13:08:15 EST 2017

The good news is if the dataloger you get has a mems pressure sensor, you
will have a high precision temperature sensor, whether or not the product
software provides that resolution to you is another matter. In addition to
the piezo-resistive bridge being mechanically sensitive to diaphragm
strain, they are also great thermistors. Which ends up requiring a high
resolution temperature sensor to temperature compensate the bridge readings.

Two related but off target products I would personally recommend is picking
up a used EeePC as a usb data sink. I bought one of the originals back
almost 10 years ago, and I still find it to come in handy once in awhile
versus a rasperry pi, you could likely pick one up for nothing today. A USB
labjack works quite well to tack up a few thermistors to a DUT for logging,
it also has full driver support for linux/windows with a python interface
(other languages too).

On Tue, Jan 3, 2017 at 10:08 AM, Tom Van Baak <tvb at leapsecond.com> wrote:

> I have some high-end temperature and pressure instruments. But for casual
> use in my home and mobile timing lab I use Sparkfun Weather Stations. The
> old URL is:
>     https://www.sparkfun.com/products/retired/10586
> It's USB, talk-only, one reading a second, temperature, pressure, humidity
> -- about as simple as you can get. Perfect for data logging along with
> frequency standards, GPS, counters and such.
> But they don't make 'em anymore. My question is what similar
> well-engineered, talk-only, serial or USB, temperature-pressure-humidity
> sensors have you run across and could recommend? Not to be picky bit no
> cheapo 1C or 0.5C sensors; 0.1C or better is ok.
> I know it's "easy" to throw one together with an Arduino, but I'm looking
> for something pre-packaged, something that reliably works, out-of-the-box.
> I have backup plans but hope someone on the list knows some products they
> have used and would recommend.
> We could extend the discussion to voltage and power monitors too. Or some
> kind of universal sensor TAPR project. But for now, let's just keep it to
> simple air / environmental sensing.
> Thanks,
> /tvb
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