Air Temp. Module Sensors for Datacenter/Server rooms

Hi everyone,
Has anyone had any experience with air temperature sensors for server rooms or datacenters? Basically what I am looking for is a device that can read temperature in a room or even inside of a computer and relay that information either through email or through a web browser. I found a couple companies that do this but I have no idea how good they are.

What I was looking for is something along the lines of this: http://www.microdaq.com/sensatronics/temptraxe.php

If anyone has any suggestions on other mfrs or some tech data on these things, please let me know.

My email address is: alex.fridman@verispan.com

Thanks very much!
Alex