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D Model Sensors: Reflectance Dependent ANALOG OUTPUT

Direction of Target Motion

D models are commonly used for measurements to objects moving parallel to the axis of the sensor.

D motion sensor

d sensor graph

The output voltage function for D model sensors includes a near side region where the voltage rises with increasing distance, an optical peak region, and a far side region where the voltage output decreases with increasing distance. Operation in the near side region gives high sensitivity with limited operating range. Operation in the far side region gives moderate sensitivity with greater operating range.

D Type sensors are fast responding units ideal for dynamic applications with single axis motion such as found in actuators, pistons and valves.

  • DC-20 KHz is standard
  • DC-200 KHz or higher is optional
  • DC-100 Hz provides best resolution

Standard analog units include:

  • Electronics with 0 to +5 VDC output
  • 3 foot long fiberoptic cable
Photo of D Model Sensor
Model Tip Diameter Total Range Near Side Range Near Side Resolution at 100Hz

Far Side Range Far Side Resolution at 100Hz
  mm mm mm µm mm µm
D6 0.56  1 0.25 0.080 0.75 0.15
D12 0.56  2 0.25 0.008 1.75 0.10
D20 0.81  1.3 0.12 0.008 1.15 0.04
D21 0.81  2 0.25 0.015 1.75 0.15
D47 1.61  5 0.3 0.01 4.7 0.10
D63 3.18  3 0.15 0.002 2.85 0.13
D64 3.18  6 0.3 0.008 5.7 0.13
D100 3.18  10 0.4 0.013 9.6 0.2
D125 3.96  15 0.4 0.002 14.6 0.13
D169 4.76  20 0.5 0.008 19.5 1.25
D170 4.76  30 0.9 0.008 29.1 0.6
D171 4.76  50 10 0.13 40 0.6
D240 7.92  76 14 0.5 62 1