Here you go.
http://www.redlion.net/G3features/G3 Feature - Email_SMS.html
With this equiptment you can do anything. Programing is another issue. These HMI controllers can do pretty much anything. Process control, building management, Aquarium monitoring? I use this equiptment for gas detection receiver/controller. It is industrial grade, and expensive. For probe monitoring, a industrial type monitor would probably have to be conected to the input module via 4 to 20ma transmitters. Not cheap. Off the top of my head, depending on the cost of a 4 to 20 probe transmitter, lets guess $500 at a qty. of three,
1 - 7.5" LCD Touch Screen controller, 1 - input module, 1 - output module, 1 - custom programing, 1 - ethernet switch, and
1 - Email/SMS Notification module, I have a grand ballpark figure of $7000.00 with no labor.
The thing with this type of equiptment is that it works, and continues to work properly. Never software issues. Once the program is written to work properly, it never changes.
If an assembly line that is producing solar panel wafers shuts down due to the controller or any other reason, it can cause the mfg. in excess of $10,000.
For the Big Boys.