[dap930]

The Cherry Corp hall sensor I used was P/N GS100502, which comes with the wire leads (the body is anodized aluminum, red color). It is rated for -40 to 125* C. It has an M12 external thread, so I drilled the scavenger pump housing for a clearance hole. I spoke wrong (its been awhile since I wired this), it does require a pull up resistor, which is connected between the output signal and Vcc input voltage. It would connect between the brown and black leads. If you use 5VDC input voltage, a 1K resistor is required. If you use 12VDC input voltage a 2.4K resistor is required. You can google the part number to find several vendors who sell this (around $27).