Temperature (environmental) sensors
The sensor Jim linked :
Temp/humidity with I2C interface
https://www.adafruit.com/products/1293
looks good - packaged, high res temperature, etc. It's not 'complete' in
that it's only a sensor, but you only have to attach a USB-I2C adapter.
Probably less work than connecting up the sparkfun board.
On Tue, Jan 3, 2017 at 6:08 PM, Scott Stobbe scott.j.stobbe@gmail.com
wrote:
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@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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Hi
There’s always the “cool factor” of higher resolution. Apparently it’s not enough
of a issue to make it a worthwhile market to serve.
Based on what has been tossed around, it sounds like an Arduino with some
bits plugged in is the low cost leader. 3D print up and enclosure and you have
it all in a some large form factor.
Bob
On Jan 3, 2017, at 12:54 PM, jimlux jimlux@earthlink.net wrote:
On 1/3/17 9:15 AM, Bob Camp wrote:
Hi
There is an ever increasing pool of good sensors to put into something like this.
(More so for temperature and pressure. Humidity still is a bit of an issue.)
There’s not a lot to interface between the sensor and a USB “chip”. It’s surprising
that there aren’t more cheap / high accuracy choices out there.
the market probably isn't there for a cheap "pod" with an interface and high accuracy..
The Lascar units (and similar $100-ish ones from others) meet most of the existing need fairly well (e.g. monitoring the temperature of your freezer for FDA regulatory compliance, monitoring the temp and humidity in your ESD controlled space)..
The need for 0.1 degree C room temp measurement is, I think, fairly limited
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Hi Tom:
I've used the Onset data loggers and they are very inexpensive and work well. As a plus they are PIC based so hackable.
Don't know about accuracy, resolution &Etc.
http://www.onsetcomp.com/products/data-loggers
http://www.prc68.com/I/Hobo.html
http://www.prc68.com/I/GPend.shtml
The "Pendant" devices use an optical 2-way link to USB so there is no penetration in their water tight enclosure.
--
Have Fun,
Brooke Clarke
http://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
The lesser of evils is still evil.
-------- Original Message --------
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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