---
product_id: 667230402
title: "Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX"
brand: "twidec"
price: "€ 59.42"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/667230402-twidec-m12-approach-sensor-inductive-proximity-switch-npn-no-dc
store_origin: NL
region: Netherlands
---

# DC 6-36V wide voltage range 4mm precise detecting distance 12mm compact cylinder design Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX

**Brand:** twidec
**Price:** € 59.42
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your automation game with pinpoint precision proximity sensing!

## Quick Answers

- **What is this?** Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX by twidec
- **How much does it cost?** € 59.42 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/667230402-twidec-m12-approach-sensor-inductive-proximity-switch-npn-no-dc)

## Best For

- twidec enthusiasts

## Why This Product

- Trusted twidec brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Compact:** 12mm diameter cylinder fits effortlessly into tight spaces without compromising performance.
- • **Robust & Reliable:** Durable plastic and alloy construction built to withstand demanding environments.
- • **Pinpoint Detection:** 4mm sensing distance ensures accurate proximity detection of iron objects every time.
- • **Power Your Precision:** Operates seamlessly within a broad 6-36V DC range for versatile industrial applications.
- • **Plug & Play Simplicity:** Pre-wired 1.2m cable with NPN NO output for quick integration and hassle-free setup.

## Overview

The Twidec LJ12A3-4-Z/BX is a compact inductive proximity sensor featuring a 4mm detection range, NPN NO output, and a wide 6-36V DC operating voltage. Designed with a durable plastic and alloy body and a 12mm cylindrical form factor, it delivers reliable iron object detection with a 300mA current output, perfect for seamless integration in professional industrial automation setups.

## Description

When proximity switch is close to some target object, it will send out control signal. It is widely used in machine, paper making, light industry for limiting station, orientation taking count, speeding trial ect. It is a component widely used in automatic control industry for detecting, controlling, and noncontact switching.

## Features

- Product Name：Inductive Proximity Switch; Wire Type : DC 3 Wire Type (Black, Brown, Blue);Switch Appearance Type : Cylinder Type
- Supply Voltage : DC 6-36V;Current Output : 300mA;Detect Object : Iron
- Model: LJ12A3-4-Z/BX;Theory : Inductive Sensor;Output Type: NPN NO;Diameter of Column Sensor: 12mm;Detecting Distance : 4mm
- Total Size: 6.2 x 2cm/2.4'' x 0.8'' (L*Max. Dia); Cable Length: 1.2m/47'';Net Weight :44g
- External Material : Plastic, Alloy;Package Content : 1 x Inductive Proximity Switch

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Twidec |
| Part number | JND-LJ12A3-4-Z/BX |
| Item Weight | 50 g |
| Package Dimensions | 12.6 x 8.5 x 1.9 cm; 50 g |
| Item model number | JND-LJ12A3-4-Z/BX |
| Size | NPN NO |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX - Image 1](https://m.media-amazon.com/images/I/51+zWQh7raL.jpg)
![Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX - Image 2](https://m.media-amazon.com/images/I/51+atthuzUL.jpg)
![Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX - Image 3](https://m.media-amazon.com/images/I/51Q3exdo87L.jpg)
![Twidec /M12 Approach Sensor Inductive Proximity Switch NPN NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BX - Image 4](https://m.media-amazon.com/images/I/41ZV8+avy9L.jpg)

## Questions & Answers

**Q: used for geeetech A10**
A: Use Google, Facebook and other forums to determine how to wire this with your 3D printer.

**Q: will this detect brass?**
A: Yes,

**Q: Is this a Hall Effect sensor?**
A: ASIN:B07P1GKQRM This is a Hall effect sensor

**Q: Does "4mm" mean I have to place it exactly 4mm from the surface?**
A: 4mm is max distance that sensor will reliably react

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-21*