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Hall Effect Sensors

The sensor works by supplying a constant current to a semiconductor. Exposing the semiconductor to a magnetic field causes a voltage to be produced across the semiconductor.  A digital Hall Effect Sensor has a comparator connected to the output such that a change in output voltage does not occur until a certain minimum magnetic flux has been reached.

Click For more information on how Hall Effect Sensors work.
Selected Hall Effect Gear Tooth Sensors

Series SI-2000: 4-20mA Output

Part # Frequency
SI-2000-10 0-10 Hz
SI-2000-20 0-50 Hz
SI-2000-30 0-90 Hz
SI-2000-40 0-1500 Hz
Specs for All SI-2000 Series
Supply Voltage: 24 VDC
Supply Current: 35 mA Max
Airgap: .050 in Max
Operating Temperature: 0-85C

Get the datasheet for the SI-2000 Series
Selected Hall Effect Switches

Technical Specifications For SI-1500 Series
INPUT VOLTAGE, Vcc: +4.5 to 24 VDC
INPUT CURRENT, Icc: 10 mA MAX, OUTPUT OPEN
OUTPUT SIGNAL, Isink: 25 mA MAX,
OUTPUT SATURATION VOLTAGE: 0.4V MAX
OPERATING FREQUENCY: 0-12KHz
OUTPUT SIGNAL: OPEN COLLECTOR WITH 2.2K OHM INTERNAL RESISTOR
TARGET: "S" MAGNETIC POLE WITH 180 GUASS AT FACE
OPERATING TEMERATURE RANGE: -20ºC TO +150ºC
VIBRATION: 15G, 10-2000Hz
DIELECTRIC STRENGTH: 150 VRMS
HUMIDITY: 95% RH WITH CONDENSATION

Get the datasheet for the SI-1500 Series
Selected Hall Effect Zero Speed Sensors

Technical Specifications For SI-1000 Series
INPUT VOLTAGE, Vcc: +4.5 to 30 VDC
INPUT CURRENT, Icc: 20 mA MAX
OUTPUT SIGNAL, Isink: 25 mA MAX
LOGIC ZERO STATE: 400 mV of 20 mA SINK CURRENT
OPERATING FREQUENCY: 0-25KHz
TARGET WHEEL: FERROUS GEAR
AIRGAP: PER GRAPH
OPERATING TEMERATURE RANGE: -40ºC TO +125ºC
DUTY CYCLE: 20-80%
OPERATION: FERROUS TARGET PRESENT: LOGIC LOWFERROUS TARGET ABSENT: LOGIC HIGH

Get the datasheet for the SI-1000 Series