Hi,
One thing you may be offered is the Sunbeam Windmill. Although I have had bad experiences with them you should give it a try. The only thing is it does not support 4 pin fans, even with 4 to 3 pin adapters. You must be using all 3 pins. The digital display on the front tells you the status of up to 7 fans and monitors 3 temps (hdd, cpu and system). Thermal diodes are used to monitor those temps. You can set each readings max temp limit. Then with a dial you can control each fans voltage. There are PCI cards that you hook fans to that allow you to control the fans via software. I don't think they have temp sensors but you should google it because I am sure there is one that does.
Sorry for any typos but the keybaord hooked up to my laptop sucks. I would replace it but I almost always use my desktop so why bother.