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

Operating ambientluminance

Incandescent lamp:20000 lux max., Sunlight:30000 lux max.

Operating temperature range

-10 to 55°C 14 to 131°F, No freezing

Operating ambient humidity

35 to 85% RH (No condensation)


10 to 55 Hz double amplitude 1.5 mm 0.06" 2 hours each in X, Y and Z axis

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% max. Class 2*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


Operating temperature range

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

Operating ambient humidity

35 to 85% RH (No condensation)


10 to 55 Hz double amplitude 1.5 mm 0.06" 2 hours each in X, Y and Z axis

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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