5/16"-24 hall effect speed sensor.

• Triggered by ferrous material (Not magnets)
• 5/16"x24 body
• Built in LED light for easy setup
• Stainless steel body
• Detection range 0.1MM to 1MM (0.004" to 0.04")
• Flush mount
• Supply voltage 10V-30V
• Short circuited/reverse protection built in.
• Working temperature -13F to 176F
• IP67 rated (waterproof)
• Normally open signal 
• Max switching frequency 8,000HZ 

Wiring:

Brown = power supply (10-30VDC)

Blue = Clean ground

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