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The product is intended for specialists and requires qualified and authorized personnel. The product does not include assembly/use instructions . Putting the product into operation by unqualified persons leads to the loss of the warranty according to the Terms and Conditions on the site.
The specified technical parameters (current, power, etc.) represent maximum allowable values under ideal operating conditions. For safe use and optimal lifespan, it is recommended to operate the product continuously at no more than 50% of the specified maximum values.
Inductive proximity sensor, NPN, NC, LJA18M-10N2, 6-36V
Inductive proximity sensor for non-contact detection of metal objects, ideal for industrial automation and DIY projects. It offers a 10 mm detection distance, NPN normally closed output compatible with PLCs and microcontrollers, 6-36 VDC power supply, and status LED. Robust M18 nickel-plated brass housing and IP67 protection for dusty and humid environments.
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Inductive sensor from the LJA series designed for contactless detection of metal objects. The cylindrical body with a diameter of 18mm (M18) allows quick installation in various industrial applications or DIY projects. The LJA18M-10N2 variant features a detection distance of 10 mm, NPN output, normally closed (NC), operates at a supply voltage range of 6-36 VDC, and has an integrated 2-meter cable with 3 wires. The sensor is of the non-flush type.
The status LED indicates the presence of an object within the detection range, and the integrated protections (short circuit, reverse polarity) ensure safe operation in industrial environments.
Specifications:
Body diameter: 18 mm (M18)
Mounting type: Non-flush
Supply voltage: 6 - 36 VDC
Current consumption: ≤ 15 mA (no load)
Output current: ≤ 300 mA
Standard detection distance: 10 mm
Response frequency: 0.2 KHz
Output type: NPN, NC (normally closed)
Protections: Short circuit, reverse polarity
Operating temperature: -25 ~ 65°C
Protection rating: IP67
Cable: 3 wires, 2 m length, PVC insulation
Housing material: Nickel-plated brass
Sensing surface: ABS
Pinout:
| Wire color | Signal | Description |
|---|---|---|
| Brown | VCC | Positive supply (6-36V DC) |
| Blue | GND | Ground |
| Black | OUT | NPN output |
Usage:
Install the sensor on an M18-compatible mount, ensuring a free distance from other metal objects that could interfere with detection.
Connect the brown wire to the power source (6-36 VDC), the blue wire to ground, and the black wire to the controller input (PLC, Arduino, relay, etc.).
For stable operation, it is recommended to set the working distance to a maximum of 70% of the standard detection distance. The standard detection distance (10 mm) applies to iron. For other metals, the effective distance is calculated by multiplying the standard detection distance by the corresponding correction coefficient:
Steel: ~0.9
Brass: ~0.7
Chrome-nickel: ~0.6
Aluminum: ~0.4
When no metal object is in front of the sensor, the output is ON (switched to GND, LOW level), activating the load connected between the output and VCC. When a metal object enters the detection range, the output switches OFF (zero voltage), and the built-in LED lights up.
Warning!
Do not exceed the maximum output current of 300 mA; for large loads (gear motors, bulbs, etc.), use an intermediate relay.
In applications with strong interference, install an overvoltage protection device.
Do not use the sensor within the first 100 ms after powering on, as this is the stabilization period.
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
// LJA18M-10N2 Inductive Proximity Sensor - NPN NC - Arduino Test
// Sensor OUT (black wire) connected to Arduino digital pin 7
// Pull-up resistor recommended (10kOhm between OUT and VCC)
const int sensorPin = 7;
void setup() {
pinMode(sensorPin, INPUT);
Serial.begin(9600);
Serial.println("Inductive sensor test started.");
delay(200); // Wait for sensor stabilization (min. 100ms)
}
void loop() {
int sensorState = digitalRead(sensorPin);
// NPN NC: LOW = no object detected (output ON, pulled to GND)
// HIGH = metal object detected (output OFF)
if (sensorState == HIGH) {
Serial.println("Metal object DETECTED");
} else {
Serial.println("No object detected");
}
delay(200);
}
