LJ12A3-4-Z/BX Proximity Inductive Sensor DC 6-36V 200mA 3-Wire NPN NO 4mm

Description

What it is

The LJ12A3-4-Z/BX proximity sensor is an inductive device used to detect the presence of metallic objects. It is compatible with Arduino and can be integrated into various DIY, robotics, or industrial applications.

Features

• Supply Voltage: 6-36V DC
• Maximum Operating Current: 200mA
• Sensor Type: NPN, NO (Normally Open) type
• Detection Range: up to 4mm

What it is for

This sensor is ideal for applications requiring the detection of metallic objects in proximity. It can be used to create alarm systems, obstacle detection, or any other project that requires the presence of a metallic object within a certain distance.

Tutorial: How to Use Inductive Proximity Sensor LJ12A3-4-Z/BX

The inductive proximity sensor LJ12A3-4-Z/BX is perfect for detecting metallic objects up to 4mm. It is ideal for DIY projects, robotics, and industrial applications.

What you need

• Arduino Uno
• Prototype connection (e.g., breadboard)
• Jumper wires

Steps

1. Connect the sensor pins to the breadboard: VCC to +5V, GND to ground, and OUT to a digital switch on the Arduino.
2. Check the power supply voltage on the datasheet to ensure it is between 6-36V.
3. Download the provided Arduino code and upload it to the Arduino.
4. Open the Serial Monitor in Arduino IDE at a baud rate of 9600.
5. Approach a metallic object to the sensor to see the reaction on the serial monitor.

Example code

// Codice Arduino
void setup() {
  Serial.begin(9600);
  pinMode(A1, INPUT);
}

void loop() {
  int sensorValue = digitalRead(A1);
  if (sensorValue == HIGH) {
    Serial.println("Oggetto metallico rilevato");
  }
}

Mini project

Create an alarm system that sends a notification when a metallic object is approached.

Common mistakes

• Do not verify the correct power supply voltage on the datasheet.
• Connect the sensor to an unconfigured digital port as input.
• Ignore the sensor’s detection range (4mm).
• Do not test the sensor with metallic objects.

Recommended accessories

• Breadboard
• Jumper wires
• Arduino Uno
• LCD Display

Frequently asked questions

What is the detection range of the sensor?
The maximum detection range is 4mm. Check the datasheet.

Can I use the sensor with a non-metallic object?
No, the sensor only works with metallic materials.