Is there any fan hub that lets me monitor RPM?

[Fire Bluee]

I don't need 4 pin. I'm fine with anything, just not over $30.

 

[reedo_43]

http://www.amazon.com/Kingwin-Performance-Controller-Cooling-FPX-002/dp/B00DP9YQLM/ref=sr_1_7?s=pc&ie=UTF8&qid=1453458627&sr=1-7&keywords=computer+fan+controller