Temperature sensor for my old Gigabyte Motherboard

Hi, I was wondering how I could get to monitor the temperature for my old Gigabyte 693A-596B-8671 motherboard. There is no built in sensor and I have no way of knowing my mobo and cpu temp. Is there a temperature sensor I can buy to monitor it? If so, how does it work (how do I hook it up), and what are the types of models & prices. I looked a bit for this but i'm a bit confused for what i'm looking for.

Mobo: Gigabyte 693A-596B-8671
CPU: Intel Pentium III EB, 733MHz, 370 socket
Chipset: VIA Apollo pro

 

I found this while surfing: http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=36_145&products_id=3104

I'm wondering if it's compatible with my PC?