Gear Tooth Sensors 1GT Series

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The Honeywell 1GT Series Gear Tooth Sensors use a magnetically biased Hall effect integrated circuit to accurately sense movement of ferrous metal targets. This specially designed I.C., with discrete capacitor and bias magnet, is sealed in a probe type package for physical protection and cost effective installation. Output is digital, current sinking (open collector). Reverse polarity protection is standard. If power is inadvertently wired backwards, the sensor will not be damaged.


  • Senses ferrous metal targets
  • Digital current sinking output (open collector)
  • Wide continuous operating Temperature range
  • Better signal-to-noise ratio than variable reluctance sensors
  • Excellent low speed performance
  • Output amplitude not dependent on RPM
  • Sensor electronically self-adjusts to slight variations in runout and variations in temperature
  • Fast operating speed – over 100 kHz
  • EMI resistant
  • Reverse polarity protection and transient protection


  • Automotive
    • Camshaft and crankshaft
    • Transmission speed
    • Tachometers
    • Antiskid/traction control
  • Industrial
    • Sprocket speed
    • Chain link Conveyor spee and distance
    • Stop motion detection
    • Tachometers, counters