Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX
Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX
Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX
Quality electronics from The Tech Depot, Bengaluru. Fast shipping, 7-day warranty on manufacturing defects, expert support.
Product Overview
The LJ12A3-4-Z/BX is a professional-grade inductive proximity sensor designed for reliable object detection in industrial and automation applications. With its compact tube design, wide voltage range, and precise 4mm detection distance, this NPN sensor delivers consistent performance for metal detection tasks.
Technical Specifications
| Parameter | Details |
| Model | LJ12A3-4-Z/BX |
| Sensor Type | Inductive Proximity Sensor |
| Output Type | NPN (Normally Open) |
| Operating Voltage | DC 5V - 36V |
| Detection Distance | 4mm (adjustable) |
| Switch Type | Normally Open (NO) |
| Housing | Tube Type / Cylindrical |
| Connection | 3-Wire |
| Response Time | Fast & Reliable |
| Warranty | 7-day warranty on manufacturing defects |
| Origin | Original/Authentic |
Key Features
Wide Voltage Range - Works with DC 5V to 36V power supplies
4mm Detection Range - Precise metal object detection
NPN Output - Compatible with standard industrial controllers
Normally Open Switch - Activates when metal approaches
Compact Tube Design - Easy installation in tight spaces
Durable Construction - Built for industrial environments
Fast Response Time - Real-time detection performance
Low Power Consumption - Energy-efficient operation
Why Choose This Sensor?
100% Authentic - Sourced from trusted authorized distributors
Fast Delivery - 1-5 day shipping, 7-8 day delivery from Bengaluru warehouse
Expert Support - 24/7 technical assistance via email & WhatsApp
Reliable Warranty - Full 7-day warranty on manufacturing defects protection
Competitive Pricing - Best value for quality components
Applications & Use Cases
Industrial Automation
- Conveyor belt systems
- Assembly line detection
- Machine positioning
- Part counting systems
DIY & Hobbyist Projects
- Robotics and automation projects
- Security systems
- Object detection circuits
- Arduino/Raspberry Pi projects
Professional Installations
- Manufacturing equipment
- Smart door systems
- Proximity-based controls
- Industrial sensors
Educational Use
- Electronics learning
- Sensor technology education
- Control system projects
- STEM applications
How It Works
The LJ12A3-4-Z/BX uses electromagnetic induction to detect ferrous and non-ferrous metal objects. When a metal object enters the 4mm detection zone, the sensor triggers its NPN output, which can be used to control relays, microcontrollers, or other devices.
Detection Range: Up to 4mm from sensor face
Output: Switches from OFF to ON when metal detected
Reset: Automatic when metal leaves detection zone
Connection Guide
| Pin | Function |
| Brown | Positive (DC+) |
| Blue | Negative (DC-) |
| Black | Output (NPN) |
What's Included in the Box
1x LJ12A3-4-Z/BX Inductive Proximity Sensor
Technical datasheet & documentation
Installation guide 24/7 customer support accessProduct Quality Assurance
100% Authentic - Verified from authorized suppliers
Quality Tested - Each unit tested before dispatch
Factory Fresh - Original sealed packaging
7-day warranty on manufacturing defects - Full manufacturer coverage
Frequently Asked Questions
Is this sensor 100% authentic?
Yes, absolutely. We source directly from authorized distributors with full authentication verification. Each product comes with verification documentation.
What voltage range does it support?
The LJ12A3-4-Z/BX operates on DC 5V to 36V, making it compatible with most industrial power supplies and microcontroller systems.
What is the detection distance?
The sensor has a 4mm detection range, meaning it can detect metal objects up to 4mm away from the sensor face. This distance is adjustable through the sensor's potentiometer.
Is this NPN or PNP?
This is an NPN sensor with Normally Open (NO) output, suitable for standard industrial controllers and microcontroller applications.
What warranty is included?
Full 7-day warranty on manufacturing defects covering all defects in materials and workmanship. Support available 24/7 via email and WhatsApp.
How fast is shipping?
We offer 1-5 day shipping, 7-8 day delivery to most locations across India from our Bengaluru warehouse. Express options available on request.
Can I use this with Arduino/Raspberry Pi?
Yes! The NPN output is fully compatible with Arduino, Raspberry Pi, and other microcontroller platforms. Simply connect to a digital input pin.
What's your return policy?
Buy Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX Online in India
Purchase the Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.
Looking to buy Tube Type Inductive Proximity Sensor Detection Switch NPN DC5-36V 4mm Normally Open switch LJ12A3-4-Z/BX at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.