Optek (TT Electronics) OPB720A-12Z

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Sensor; Reflective; Long Range; 10 To 30Vdc; Chassis Mount; 1 To 305mm
Manufacturer #: OPB720A-12Z
Allied Stock #: 70048631

RoHS Compliant Part



Datasheet Datasheet

  • Non Cancelable Non Returnable (NCNR) part. Please see Terms of NCNR
Pricing (USD) & Availability
Standard Pricing
$13.73 (Each)
100 $13.73

0 can ship immediately.

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Minimum Quantity: 100

Multiples Of: 100


Connection Type : Wire Leads
Operating Temperature, Maximum : 50 C
Operating Temperature, Minimum : 0 C
Output : Totem Pole
Range, Measurement : 0.001-0.305 m
Sensing Mode : Reflective
Series : OPB Series
Supply Voltage : 10-30 VDC
Technology : Photoelectric
Type : Proximity Sensors


The OPB720A Series reflective switches detects objects as far away as 24" (610 mm) using standard 90% reflective material, and can detect objects as small as 0.08" (2 mm). The OPB720 series consist of three standard reflective switching distances OPB720A-06Z for typically 6" (152 mm), OPB720A-12Z for typically 12" (305 mm) and OPB720A-36VZ for typically 36" (915 mm). The OPA720A sensor is NOT affected by ambient light in most conditions. By using a synchronous driver detection scheme, ambient light is compensated for. This sensor has a logical output that switches from a high level with reflective target to a low level with no reflection target. With the addition of hysteresis, the OPB720A series minimizes switching oscillations on the output. The type of material used for the target is very dependent on the distance that can be achieved for the sensor. Taking this into consideration, the OPB720A series can be used in either a reflective or interruptive mode. As an example, the OPB720A-12Z can easily be used in a reflective mode for distances around 12" (305 mm) while when reflecting of a retro-reflective target similar to 3M 3870 or Nippon Crystallite at distances around 85" (216 mm) the device works well in the interruptive mode. See the included charts for typical distances with
different reflective material for other versions of the OPB720A series devices. The OPB720A series has an open collector output transistor and power requirements are compatible with most PLCs and TTL gates


  • Conveyer belt package system.

  • Personnel movement recognition.

  • Near-focus security systems.

  • Hand wash soap dispensing stations.

  • Toilet and urinal sensing.

  • Dispensing systems.


  • 0.04" to 36" (1 mm to 915 mm) with 90% reflective material. (Typical Maximum detection distance to be set at factory)

  • Recognizes objects as small as 0.08" (2 mm)

  • Ambient light rejection < 100K Lux

  • Open collector output

  • Cable length 39" (990 mm) lead length 28 AWG wire

  • Product Added to Cart
    Optek (TT Electronics)
    Sensor; Reflective; Long Range; 10 To 30Vdc; Chassis Mount; 1 To 305mm
    Allied Stock #: 70048631
    Mfr's Part #: OPB720A-12Z
    $13.730 Each
    Quantity added: