LJ8A3-2-Z/DX Proximity sensor

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Component Electronic Sensor Sensors

Internal Reference: SEN-063

LJ8A3-2-Z/DX Proximity Sensor Description

Proximity Sensors detect an object without touching it, and they, therefore, do not cause abrasion or damage to the object. Devices such as limit switches detect an object by contacting it, but Proximity Sensors are able to detect the presence of the object electrically, without having to touch it.

Three-wire proximity sensor wiring: the red (brown) wire is connected to the positive side of the power supply; the blue wire is connected to the 0V side of the power supply; the yellow (black) wire is the signal, which should be connected to the load.

Pin Out

Wiring Diagram with Arduino Uno

LJ8A3-2-Z/DX Proximity sensor Specification

Model number

LJ8A3-2 series

External dimensions


Installation type


Detection distance


Setting distance

0-1.6 mm

Supply voltage

6-36Vdc, 5Vdc; 90-250Vac, 50/60Hz

Output current

DC type: 300mA max; AC Type: 400mA

Standard detected object

Mild steel (8x8x1mm)

Sensing object

Magnetic metals (if it is not magnetic metals, the sensing distance would decrease)

Response frequency


Matched mounting bracket

M8 mounting bracket

Output indication


Short-circuit protection


Reverse connection protection


Insulation resistance

50MΩ min (between charging part and housing)

Dielectric strength

1000Vac, 1min (between charging part and housing)

IP Rating


Operating temperature

-25 to 70 ℃ (13 to 158 ℉)

Cable length

1.2m, PVC cable

Material Case

Brass-nickel plated; Sensing surface: ABS