5/16"-24 hall effect speed sensor.

• Triggered by magnets (Not ferrous material)
• 5/16"x24 body
• Built in LED light for easy setup
• Nickel plated
• Detection range 0.1MM to 10MM
• Flush mount
• Supply voltage 10V-30V
• Short circuited/reverse protection built in.
• Working temperature -13F to 176F
• IP67 rated (water proof)
• Normally open signal 
• Max switching frequency 1000HZ 

wiring:

Brown = power supply (10-30VDC)

Blue = Clean ground

Black = Signal wire  (Outputs 0V) to data logger.