Color:Black Sparkle The Bitspower G1/4 Thread Flow Sensor is a great way to install a safety valve into your looping loop. Just install this flow sensor into your cooling loop and connect the rpm cable on your motherboard CPU fan header. Once installed the flow sensor will send the RPM signal to the mainboard thus allowing you to utilize the BIOS safety settings. These can also be used on fan controllers and other RPM sensing devices as well! Model: BP-FS-CLBKBS.