I imagine you could rig-up Cacti <http://www.cacti.net/>with the
Threshold & Alerting plugins using SNMP enabled product.

*Weathergoose - *http://www.itwatchdogs.com/
Internal web server, temp, humidity, air flow, light, sound, attach up
to 16 remote sensors.
They have other sensors as well.
http://www.itwatchdogs.com/products_sensors.shtml

I haven't used one my self, but I got that recommendation from a thread
on arstechnica.
http://episteme.arstechnica.com/eve/forums/a/tpc/f/833003030931/m/961001892931

Have Fun.

-Israel

Marlon K. Schafer wrote:
> Out here we're working on connecting a spud shed with the same needs.
>
> industrial HVAC systems should handle this via the internet by texting 
> and/or emailing people.
> marlon
>
> ----- Original Message ----- 
> From: "RickG" <rgunder...@gmail.com>
> To: "WISPA General List" <wireless@wispa.org>
> Sent: Saturday, January 17, 2009 5:20 PM
> Subject: Re: [WISPA] Emailing: DSC_2282.JPG, DSC_2244.JPG, 
> DSC_2251.JPG,DSC_2257.JPG, DSC_2262.JPG, DSC_2264.JPG, DSC_2270.JPG, 
> DSC_2273.JPG
>
>
>   
>> This reminds me of a need on e of my customers has. They own & operate
>> a large nursery with multiple greenhouses. When the temperature dips
>> below 20 degrees someone must sleep in the shed near the greenhouses
>> to monitor the heaters. If a heater turns off due to an electric
>> outage or other reason they stand to loose thousands of dollars. They
>> used to have an alarm type of system that ran through the phone lines
>> that detected temperature and/or electric outage and paged them.
>> Unfortunately the cost was not worth the occational "slumber party" so
>> they ditched the phone lines. I figure there is something else that
>> could work for this. Any ideas?
>> -RickG
>>
>> On Sat, Jan 17, 2009 at 1:05 AM, Marlon K. Schafer <o...@odessaoffice.com> 
>> wrote:
>>     
>>> This freezing fog is very pretty but boy is it making a mess of things up
>>> here!  Found out that battery backup units die faster than they can be
>>> charged!
>>>
>>> I'm going to have to buy more generators.  2 isn't enough and the camper
>>> that I can access is still snowed in.
>>>
>>> The good news is that this is supposed to let up in a bit under a week.
>>>
>>> marlon
>>>
>>>
>>>
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>
>
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