Built-in amplifier photoelectric sensors

PZ2 series

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Square Transmissive ECO Type, NPN PZ2-51ECO

PZ2-51ECO - Square Transmissive ECO Type, NPN






Detection distance

7 m 23.0'

Light source


Detectable object

Opaque material with an area of 8 mm2 or more

Sensitivity adjustment

1-turn trimmer (240°)

Response time

1.5 ms or less

Operation mode

LIGHT-ON/DARK-ON (switch-selectable)

Indicator lamp

Output and power*1: red LED, stable operation: green LED

Control output

Maximum NPN open-collector output: 100 mA (40 V or less), residual voltage: 1 V or less

Protection circuit

Reversed polarity, overcurrent protection, surge absorber


Power voltage

12 to 24 VDC ±10 %, Ripple (P-P) 10 % or less

Current consumption

Transmitter: 20 mA or less, Receiver: 25 mA or less

Environmental resistance

Enclosure rating


Ambient light

Incandescent lamp: 5,000 lux or less, Sunlight: 20,000 lux or less

Ambient temperature

-20 to +55 °C -4 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

Shock resistance

1,000 m/s2, 6 times in each of the X, Y, and Z directions

Case material

Glass-fiber reinforced plastic


Approx. 8 g

*1 Only the transmitter is equipped with a power indicator.

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