Pulse Generator Provides Current Sinking Square-wave Pulses with Frequency Proportional to Shaft RPM of Unit to Which It is Mounted Pick-up Mounts with a #10-32 Screw Directly to Motor Shaft Being Monitored 10 Pulses per Revolution Input Voltage 4.5 to 24 VDC Max RPM 5000 Output Cable Length 6 Ft 3 Wire 18 AWG Stainless Steel Ball Bearings Operating Temp -10 to 45 Degrees F Molded Santoprene Rubber Housing