Do you only need to display data that has already been collected or will you need to add the capability to acquire more points in the future? If so, I would consider moving to an ethernet based I/O controller that can send data directly to a Server and store it in a SQL database or similar...
I remember seeing a little ethernet based controller called the BarioNet in a magazine. It has a built-in web server and can be used to monitor temp, humidity, water, entry points, fire, etc, and will send snmp traps on these events. It is also programmable and can be used to send custom snmp...
These guys are good at data collection from sensors and such. www.datanab.com
They provided my company with a very easy to use and inexpensive data collection and archiving system.
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