[time-nuts] Temperature (environmental) sensors

Jim Harman j99harman at gmail.com
Tue Jan 3 12:15:20 EST 2017


These
https://www.adafruit.com/products/381
are .0625C resolution, 1-wire interface (temp only)

This one
https://www.adafruit.com/products/642
has Teflon insulation, for use at higher temps

Or this one, Temp/humidity with I2C interface
https://www.adafruit.com/products/1293


On Tue, Jan 3, 2017 at 11:19 AM, Adrian Godwin <artgodwin at gmail.com> wrote:

> All these (including the one I linked) seem to be 0.5C only.
>
> This one gets to 0.2C : http://www.ti.com/tool/hdc1010evm
>
> On Tue, Jan 3, 2017 at 4:09 PM, Paul Alfille <paul.alfille at gmail.com>
> wrote:
>
> > If you don't mind using 1-wire sensors, there are many nice choices,
> like:
> >
> > http://www.embeddeddatasystems.com/Environmental-Sensors_c_44.html for
> > temperature/humidity/barometric pressure...
> >
> >
> >
> > On Tue, Jan 3, 2017 at 10:22 AM, jimlux <jimlux at earthlink.net> wrote:
> >
> > > On 1/3/17 7:08 AM, Tom Van Baak 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
> > >>
> > >>
> > > Replaced by
> > > https://www.sparkfun.com/products/12081
> > > which doesn't have the USB.
> > >
> > > By the time you add a board with a processor, you're in the $50 range..
> > >
> > > I use these at work:
> > >
> > > https://www.lascarelectronics.com/easylog-data-logger-el-usb-rt/
> > > Well, actually I use the EL-USB-2-LCD.. which logs to internal memory
> and
> > > can't log/unload data at the same time and which requires a windows
> > program.
> > >
> > > That said, they work well, come with a traceable cal certificate, etc.
> I
> > > don't know that they do 0.1 degree (the data sheet says 0.5C, and I
> think
> > > that's the logging accuracy), and, well, humidity sensors are of
> dubious
> > > accuracy away from the middle of the range
> > >
> > > https://www.lascarelectronics.com/easylog-data-logger-el-usb-2-lcd/
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > 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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> > >>
> > >>
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-- 

--Jim Harman


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