SD101201 Gear Tooth Speed and Direction Sensors
Circuit protected, flange mount Hall Effect gear tooth speed and direction sensor
SD101201 Gear Tooth Speed and Direction Sensor Description
The SD101201 has two Hall Effect sensors; one detects speed and the other detects direction of movement of gear teeth. The outputs are open collector transistors. The Speed output goes low (ON) when sensing the leading edge of a tooth and high (OFF) at the trailing edge of the tooth when run against a standard target (see diagram). The Direction output goes low (ON) for clockwise rotation and high (OFF) for counterclockwise rotation (as seen in the diagram); it is latched in that state as long as there is movement detected. The state of the Direction output always leads the rising edge of the Speed output correct Direction sensing will occur faster after start-up than correct Speed sensing. An external pull-up resistor is required.
SD101201 Gear Tooth Speed and Direction Sensor Features
Separate digital outputs for speed and direction
From near zero speed up to 15 kHz sensing capability
Plastic flange-mount sensor rated to 125 C
RoHS compliant
IP67
Typical air gap of 1.5 mm (0.06)*
SD101201 Gear Tooth Speed and Direction Sensor Typical Applications
Wheel speed and direction
Hoist speed and direction
Transmission speed and direction
Industrial feedback and control
SD101201 Gear Tooth Speed and Direction Sensor Environmental Specifications
Vibration | Sinusoidal, 3.3 g max from 20 Hz to 1 kHz |
Maximum Speed Detection | 15 kHz |
Operating Temperature | -40 C to 125 C (-40 F to 257 F) |
Storage Temperature | -40 C to 125 C (-40 F to 257 F) |
Ingress Protection | IP67 |
Operating Supply Voltage | 4.75 to 24 VDC |
Maximum Input Voltage | 30 VDC |
Maximum Reverse Voltage | 30 VDC |
Supply Current | 20 mA max |
Output Sink Current | 20 mA max |
Typical Operating Time | 5 µs |
Recommended Pull-Up Resistor | See chart |
Housing Material | Glass Reinforced Thermoplastic |
Maximum Installation Torque Limit | 5.65 Nm (50 in lb) on threads |
Operating Air Gap / Sensing Distance* * With recommended target type; see drawing |
1.5 mm (0.06") |
Sensor Orientation | Sensitive; see drawing |
Part Number | Connector** |
SD101201 | Delphi Metri-Pak 150 |
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