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          3. Sensors
          4. Photoelectric Sensors
          5. Heavy-duty Photoelectric Sensors
          6. Specs

          Heavy-duty Photoelectric Sensors

          PX series

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          M8 Thrubeam Standard

          M8 Thrubeam Armored

          M8 Thrubeam Hex-shaped

          M12 Thrubeam Standard

          M12 Thrubeam Armored

          M12 Reflective Standard

          M12 Reflective Armored

          Light source LED

          Red 4-eleant LED
          (Wavelength:635 nm)

          Infrared LED
          (Wavelength:870 nm)

          Red 4-element LED
          (Wavelength:635 nm)

          Detecting distance


          4 m 13.1'

          10 m 32.8'

          400 mm 15.7"


          6 m 19.7'

          15 m 49.2'

          600 mm 23.6"


          12 m 39.4'

          30 m 98.4'

          1200 mm 47.2"


          20 m 65.6'

          40 m 131.2'

          2000 mm 78.7"

          Detectable object

          ø4 mm ø0.16" Opaque materials

          ø7.5 mm ø0.30"
          Opaque materials

          Spot diameter

          Approx. 15 x 15 mm 0.59"
          at 100 mm 3.94"
          Approx. 65 x 65 mm 2.56"
          at 500 mm 19.69"

          Environmental resistance

          Enclosure rating

          IEC: IP68/JEM: IP68g/NEMA: 4X, 6P, 13/DIN: IP69K

          Ambient light

          Incandescent lamp: 20,000 lux max., Sunlight: 30,000 lux max.

          Ambient temperature

          -10 to +55 °C 14 to 131 °F (No freezing)

          Relative humidity

          35 to 85 % RH (No condensation)

          Vibration resistance

          10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

          Case material

          Housing :SUS303 (Plastic parts:PMP, POM) Lens :BK7


          Screw nut (SUS303) x 4, toothed washer (SUS304) x 2

          Screw nut (SUS303) x 2, toothed washer (SUS304) x 2

          Screw nut (SUS303) x 4, toothed washer (SUS304) x 2

          Screw nut x 2,
          toothed washer x 1


          Approx. 80 g (Including cable)

          Approx. 250 g*3 (Including cable)

          Approx. 88 g (Including cable)

          Approx. 90 g (Including cable)

          Approx. 260 g (Including cable)

          Approx. 80 g*3 (Including cable)

          Approx. 220 g*3 (Including cable)

          *1 The PX-H71 and the H71TZ are available with a 10 m 32.8' cable for both transmitter and receiver.
          *2 The PX-H72 is available with a 30 m 98.4' cable for the transmitter and 10 m 32.8' cable for the receiver.
          *3 The PX-H71G, H72G and H61G have SUS304 spiral protective tube on the cables.
          *4 Contact KEYENCE for cable length variations of spiral types.





          Cable type

          Connector type



          Response time

          500 µs (TURBO) /1 ms (SUPER) /4 ms (ULTRA) /16 ms (MEGA)

          Output selection


          Indicator lamp

          - Operation indicator:Red LED x 2, DSC orange LED x 1
          - Dual digital monitor:Dual 7-segment display
          [Preset value (4-digit green LED) and current value (4-digit red LED) illuminated together,
          current value range:0 to 65504, excess gain:0 P to 999 P]
          - Hold function:Possible to display both peak and bottom hold values. Selectable from 5 variations.
          - Bar LED monitor [Excess gain displayed (85% to 115% in 7 steps)]
          - Scaling display

          Detection mode

          Light intensity (automatic sensitivity-tracking function provided)/ [Limit light intensity/output monitor]

          Shift function

          Variable between –1999 and 9999

          Timer function

          Timer OFF/OFF-delay/ON-delay/One-shot/ON-delay, OFF-delay/ON-delay, One-shot
          Timer duration selectable:1 ms to 9999 ms
          Maximum error against the setting value:10% max.

          Control output

          NPN open-collector 40 V, 100 mA max. for an output/100 mA max. for two outputs, residual voltage 1 V max.

          External input

          Input time 2 ms (ON)/20 ms (OFF) min.

          Interference prevention

          Up to 4 units (in all power modes)*1


          Power voltage

          12 to 24 VDC, Ripple (P-P) 10 % or less, Class2*2

          Power consumption

          Standard mode:50 mA max. at 24 V/55 mA max. at 12 V
          Power saving mode:40 mA max. at 24 V/45 mA max. at 12 V

          Environmental resistance

          Enclosure rating

          IEC: IP67/JEM: IP67/NEMA: 4X

          Ambient temperature

          -10 to +55 °C 14 to 131 °F (No freezing)*3

          Relative humidity

          35 to 85 % RH (No condensation)

          Vibration resistance

          10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

          Case material

          Housing:PBT, display:PSU, display cover/connector cover:SUS304, radiator plate:SUS304, gasket:NBR


          Approx. 100 g (Including cable)

          Approx. 50 g

          *1 The received light intensity may vary somewhat when the sensor head's cable layout is changed, so redo the sensitivity setting when changing the layout. The interference prevention function is affected
          somewhat when using multiple units installed adjacent to each other. Fine-tune the sensitivity (increase the setting) for adjacent layouts.
          *2 Use a 24 VDC power voltage when using a head light transmitting cable of 3 m 9.8' or more (PX-H71/H71TZ) or 10 m 32.8' or more (PX-H72).
          *3 When using multiple units connected adjacently, the ambient temperature varies with the conditions below.
          2 to 4 Units: -10 to +50 °C 14 to 122 °F, 5 to 17 Units: -10 to +45 °C 14 to 133 °F.

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