I've searched the archives, and didn't see anything current.
I am looking for a small, cheap, simply device, that can measure temp and
be polled via SNMP. POE would be a plus.
Any pointers?
-- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben --
-- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --
A search at http://www.merit.edu/mail.archives/nanog/ on "temperature"
reveals this thread in the top 10 hits:
http://www.merit.edu/mail.archives/nanog/1997-06/msg00302.html
Looks like a few people mentioned some vendors that sell these devices.
cheers,
From Google:
http://www.syrona.co.uk/sensorprobe_description.htm
http://www.dcf.sk/microweb/snmpmain.html
http://www.omnitronix.com/solutions/envmon.htm
or if your Cisco router is capable... Alex, I know you already know this, but this might help others.
OID 1.3.6.1.4.1.9.9.13.1.3.1.3
-Robert
Tellurian Networks - The Ultimate Internet Connection
http://www.tellurian.com | 888-TELLURIAN | 973-300-9211
"Good will, like a good name, is got by many actions, and lost by one." - Francis Jeffrey
They're hard to find, at least inexpensively. I've found several systems for >$700 that have some nice features, including cameras (http://www.rackbotz.com/) and multiple wireless measurement systems (http://www.microstrain.com/WWSN.html) but they've all been slightly out of range in the cost department, or have been aimed at a different market than what I was looking for. Using the Cisco temperature MIB has been pretty much the standard to this point.
After some extensive hunting a while ago, I found this: These guys make a nice (fairly) inexpensive module that I think wins the competition. It has a large number of measurement and switch inputs, runs a number of relays (built in) and seems to be fairly customizable. The bad news: it's not "native" SNMP and requires some sort of little C or Perl module to do screen-scraping. The vendor provides a sample MRTG script, so it can't be that hard.
$395 plus a lot of features, including running on minimal voltage.
I haven't purchased one of these yet, but they're close to what I've needed several times in the past, and I'm looking for excuses to purchase a few. Any of you who pick one up, I'd appreciate it if you could send feedback to me personally. It seems to me that there still is not any widely-advertised, inexpensive temperature gauge that is network-accessible (SNMP) which is surprising considering the amount of damage that can be done via overheating in a datacenter.
[Note: before I sent this, I read Robert Boyle's followup message, which has some interestingly low-priced alternatives. Perhaps I have been looking in the wrong places. In any case, the RMS device has some additional features that may make it worth examining for the remote or low-voltage wireless sites that are starting to appear with some frequency here in in the Pacific Northwest American area.]
JT
The easier answer is "define cheap". So this is my 2 cents, I'm about to try
this product (in a few weeks) across some POPs.
AKCP Sensorprobe2: http://www.akcpinc.com/company/sensorprobe.html
Thomas
I use http://www.uptimedevices.com/. It has worked very well for us to monitor our server room.
---Mike
FWIW, these appear to be the same product, re-labeled by two different companies... unless it's just a coincidence that these devices have the same back panel with three RJ-45 plus DC-in and blue curved housing?
http://www.akcpinc.com/company/sensorprobe.html
http://www.uptimedevices.com/sh2plus.html
http://www.uptimedevices.com/productpdfs/sh2plus.pdf
My guess is that it's made somewhere in Taiwan or mainland china and might be available at a much lower cost. 
Eric Kuhnke
I've searched the archives, and didn't see anything current.
I am looking for a small, cheap, simply device, that can measure temp and
be polled via SNMP. POE would be a plus.Any pointers?
-- Alex Rubenstein, AR97, K2AHR, alex@nac.net, latency, Al Reuben --
-- Net Access Corporation, 800-NET-ME-36, http://www.nac.net --
This is a bit of a late reply, but it appears that there is a reasonably inexpensive solution that I had not found when I originally replied to this message:
http://www.sensatronics.com/TempTrax/index.html
There are serial versions and ethernet-based versions. The serial version looks simple enough even to connect to the console of a Cisco for remote access via a script, and the ethernet version doesn't appear too complex, either. (Does a standard Cisco AUX port provide DTR power?) The downside is that they're not SNMP-capable directly; an intermediate glue routine would need to be written.
You can find Nagios (a popular Open-Source monitoring platform) plug-ins for these devices here:
http://www.nagios.org/products/
JT