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Hi Richard,

I've been using several DLP Design TH1 USB2.0 loggers which run
into my media cabinets, and it may even survive the harsh
environments of a refrigerator.  I haven't tried this, but the
specs claim it's good down to -40F:

http://www.ftdichip.com/Documents/DataSheets/DLP/dlpth1ds.pdf

It requires that you keep a computer running 24/7, and if you
need to run the sensor any more than 6 feet from the computer,
you'll need a USB2.0 repeater (which is what I do).  The
software is rather primitive, and if you want to generate a
report you'll need to manipulate the raw data in something
like Microsoft Excel.

I think the DLP-TH1 is a good solution for technically minded
users who don't mind rolling up their sleeves.  It certainly
is not "turnkey" or "plug-n-play".

If you find the accuracy acceptable and can live with the above
limitations, then the DLP-TH1 sensor/logger is a reasonably
cost-effective solution.

Eric Jacobs
Principal

The Audio Archive
tel: 408.221.2128
fax: 408.549.9867
mailto:[log in to unmask]




-----Original Message-----
From: Association for Recorded Sound Discussion List
[mailto:[log in to unmask]]On Behalf Of Richard L. Hess
Sent: Wednesday, June 20, 2007 12:59 PM
To: [log in to unmask]
Subject: Re: [ARSCLIST] Dataloggers


Hi, Andy,

I asked this question over on the Society of American Archivists list
a while back and the Hobo series of dataloggers came up more than any
other by a wide margin.

I've had mixed experience with Omega products, especially in a
refrigerator-type environment. I killed a $300 Omega logger and also
a smaller one with USB port (the latter was replaced under warranty).
In both cases the non-replaceable humidity sensor failed.

The good folks at OnSet computing suggested that for refrigerators
and freezers I would really want to use their waterproof line.

I haven't purchased yet (good thing the Cdn$ is going up--later) but
it's about $350US to get your first logger including the pro software
and the interface, and then $140 per additional logger.

http://www.onsetcomp.com/solutions/products/loggers/_loggerviewer.php5

is a good page to start. Many of these have user-replaceable humidity
sensors. The interface is cool as it is optical so there are no
contacts on the logger and the battery, while pricey, lasts about 3
years. I think Omega sells the same battery for half the price of
OnSet, so buy your loggers from OnSet and your batteries from Omega <smile>.

The only problem is, I hear that you can't use them for railroad
applications as they may change trains in the freight yards. <ka-ching>!

Cheers,

Richard

At 02:13 PM 2007-06-20, Andy Lanset wrote:
>Hello friends,
>
>Thanks for you input on Laughing Records.  I've got another
>query.
>
>Is there a temperature/humidity datalogger/monitor anyone can recommend
with
>for their controlled storage area(s).
>
>Thanks.
>
>Andy Lanset
>WNYC Radio
>

Richard L. Hess                   email: [log in to unmask]
Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.