Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX
- Product SKU: R1128
- Category: Arduino Ecosystem, Beginner Friendly, Intermediate Projects, Quick Deliverables, Robotics & Cars Projects, Sensor Only (Without Module), Sensors, ₹100 to ₹500
LJ12A3-4-Z/BX NPN DC5-36V 4mm Normally Open Tube Type Inductive Proximity Sensor Switch
This LJ12A3-4-Z-BX-NPN DC 5-36V Inductive 4mm NPN-NO Proximity Sensor Switch also known as Approach Sensor is a component widely used in the automatic control industry for detecting, controlling, and non-contact switching. When the proximity switch is close to some target object, it will send out a control signal.
When the metal approaches near-proximity switch sensing area, an Edy Current is induced in metal. Which in turn disturbs the magnetic field produced by the Inductive Proximity Sensor. This change is sensed by the sensor.
These inductive proximity switches can be non-contact, have no pressure, no spark, and quickly issue the electrical command. Accurately reflect the position and stroke movement mechanism. Positioning accuracy, operating frequency, service life. Easy to install and suitable for harsh environments.
This 4mm proximity sensor can detect a variety of metals, miniature size, long life, low price, shielded type installation, anti-interference ability, 1mm detection distance, used for precise positioning of molds, precision machine tools, and robots.
Applications:
- It is widely used in machines, paper making, light industry for limiting stations, orientation taking count, speeding trials, etc.
- Used in the automatic control industry for detecting, controlling, and noncontact switching.
Package Includes:
- 1 x DC 5-36V M12 Inductive 4mm NPN-NO Proximity Sensor Switch
Specifications:
| Model number | LJ12A3-4 series |
| External dimensions | M12x60 |
| Detection distance | 4mm |
| Setting distance | 0-3.2 mm |
| Supply voltage | 5-36Vdc, 5Vdc; 90-250Vac, 50/60Hz |
| Output current | DC type: 36v 300mA max 5v 150mA max; AC Type: 400mA |
| Standard detected object | Lron (12x12x1mm) |
| Sensing object | Magnetic metals (if it is not magnetic metals, the sensing distance would decrease) |
| Response frequency | 200Hz |
| Matched mounting bracket | M12 mounting bracket |
| Output indication | Red LED |
| Reverse connection protection | Yes |
| Insulation resistance | 20M? min (between charging part and housing) |
| Dielectric strength | 1000Vac, 1min (between charging part and housing) |
| IP Rating | IP65 |
| Operating temperature | -20 to 70 °C |
| Cable length | 1.2m, PVC cable |
| Material | Case: Brass-nickel plated; Sensing surface: ABS |
LJ12A3-4-Z/BX NPN DC5-36V 4mm Normally Open Tube Type Inductive Proximity Sensor Switch
This LJ12A3-4-Z-BX-NPN DC 5-36V Inductive 4mm NPN-NO Proximity Sensor Switch also known as Approach Sensor is a component widely used in the automatic control industry for detecting, controlling, and non-contact switching. When the proximity switch is close to some target object, it will send out a control signal.
When the metal approaches near-proximity switch sensing area, an Edy Current is induced in metal. Which in turn disturbs the magnetic field produced by the Inductive Proximity Sensor. This change is sensed by the sensor.
These inductive proximity switches can be non-contact, have no pressure, no spark, and quickly issue the electrical command. Accurately reflect the position and stroke movement mechanism. Positioning accuracy, operating frequency, service life. Easy to install and suitable for harsh environments.
This 4mm proximity sensor can detect a variety of metals, miniature size, long life, low price, shielded type installation, anti-interference ability, 1mm detection distance, used for precise positioning of molds, precision machine tools, and robots.
Applications:
- It is widely used in machines, paper making, light industry for limiting stations, orientation taking count, speeding trials, etc.
- Used in the automatic control industry for detecting, controlling, and noncontact switching.
Package Includes:
- 1 x DC 5-36V M12 Inductive 4mm NPN-NO Proximity Sensor Switch
Specifications:
| Model number | LJ12A3-4 series |
| External dimensions | M12x60 |
| Detection distance | 4mm |
| Setting distance | 0-3.2 mm |
| Supply voltage | 5-36Vdc, 5Vdc; 90-250Vac, 50/60Hz |
| Output current | DC type: 36v 300mA max 5v 150mA max; AC Type: 400mA |
| Standard detected object | Lron (12x12x1mm) |
| Sensing object | Magnetic metals (if it is not magnetic metals, the sensing distance would decrease) |
| Response frequency | 200Hz |
| Matched mounting bracket | M12 mounting bracket |
| Output indication | Red LED |
| Reverse connection protection | Yes |
| Insulation resistance | 20M? min (between charging part and housing) |
| Dielectric strength | 1000Vac, 1min (between charging part and housing) |
| IP Rating | IP65 |
| Operating temperature | -20 to 70 °C |
| Cable length | 1.2m, PVC cable |
| Material | Case: Brass-nickel plated; Sensing surface: ABS |
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Last updated: January 2026
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