I've used the Dallas (now Maxim) Thermochron iButtons in several applications.
Looks like a thick coin with battery, ram and RTC built in. Even used dozens of
them map temperature distribution in a aircraft fuel tank. Also available as a
1-wire device. For precision I've used Pico Technology PT105 4 channel PRD
interfaces.
Robert G8RPI.
From: jimlux <[email protected]>
To: [email protected]
Sent: Tuesday, 3 January 2017, 15:22
Subject: Re: [time-nuts] Temperature (environmental) sensors
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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