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ZF Gear Tooth Speed & Direction Sensor

Two-Channel Hall Effect Sensor, With Mounting Flange

The ZF SD74-3502 sensors are Hall Effect products for measuring very slow movements of ferromagnetic targets. They work with an Open Drain output. The immersion depth of sensor detector is 35mm.

Typical applications:

• Electric drives (stationary and mobile)
• Automation systems
• Conveyors
• Wind turbines

Key features:

• Model: SD74-3502
• Sensor body length: 35 mm (we supply also the sensor of body length 45 mm: model SD74-4502)
• Sensor detecting range: 0 - 20 kHz sensing capability
• Typical air gap range: 0.3 - 2.2 mm (0.01" - 0.09")
• Typical connector wiring (from right to left, refer to the photo):
  • Red: B+
  • White: channel 1
  • Blue: channel 2
  • Black: B-
  • For different applications, the connector form and the wiring sequence may be different. We may also rewire the connector per buyer's requirement.

For ZF speed sensor SD74-3502, it works with a wild range of supply voltage 4.5 - 24V DC (maximum input voltage 28V DC).

Note: an external pull-up resistor is required. The value of resistance is dependent on the supply voltage. The resistor should be connected between the output and Vcc.

Recommended external pull-up resistor:

Wiring diagram:

Dimensions (unit: mm):

The 45mm sensor SD74-4502 is also available.

The ZF SD74-3502 sensors are Two-Channel Hall Effect products (with mounting flange) for measuring very slow movements of ferromagnetic targets. They work with an Open Drain output. The immersion depth of sensor detector is 35mm.

Typical applications:

• Electric drives (stationary and mobile)
• Automation systems
• Conveyors
• Wind turbines

Key features:

• Model: SD74-3502
• Sensor body length: 35 mm (we supply also the sensor of body length 45 mm: model SD74-4502)
• Sensor detecting range: 0 - 20 kHz sensing capability
• Typical air gap range: 0.3 - 2.2 mm (0.01" - 0.09")
• Typical connector wiring (from right to left, refer to the photo):
  • Red: B+
  • White: channel 1
  • Blue: channel 2
  • Black: B-
  • For different applications, the connector form and the wiring sequence may be different. We may also rewire the connector per buyer's requirement.

For ZF speed sensor SD74-3502, it works with a wild range of supply voltage 4.5 - 24V DC (maximum input voltage 28V DC).

Note: an external pull-up resistor is required. The value of resistance is dependent on the supply voltage. The resistor should be connected between the output and Vcc.

Recommended external pull-up resistor:

Wiring diagram:

Dimensions (unit: mm):

The 45mm sensor SD74-4502 is also available.