---
product_id: 167161360
title: "Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NC DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/AY"
brand: "twidec"
price: "$20.47"
currency: USD
in_stock: true
reviews_count: 12
category: "Twidec"
url: https://www.desertcart.us/products/167161360-twidec-m12-approach-sensor-inductive-proximity-switch-pnp-nc-dc
store_origin: US
region: United States of America
---

# DC 6-36V wide voltage range 4mm precise detecting distance 300mA current output for reliable switching Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NC DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/AY

**Brand:** twidec
**Price:** $20.47
**Availability:** ✅ In Stock

## Summary

> 🔍 Detect with precision, control with confidence!

## Quick Answers

- **What is this?** Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NC DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/AY by twidec
- **How much does it cost?** $20.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/167161360-twidec-m12-approach-sensor-inductive-proximity-switch-pnp-nc-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

- • **Durable Build:** Plastic and alloy construction for long-lasting industrial-grade durability
- • **Reliable Output:** PNP NC output type with 300mA current supports stable control signals
- • **Robust Performance:** Wide DC 6-36V supply voltage ensures versatile application across machines
- • **Precision Detection:** 4mm sensing distance guarantees accurate, non-contact object detection
- • **Seamless Integration:** Compact 12mm cylinder fits effortlessly into tight industrial setups

## Overview

The Twidec LJ12A3-4-Z/AY Inductive Proximity Switch is a compact, industrial-grade sensor designed for precise non-contact detection of iron objects within 4mm. Operating on a versatile DC 6-36V range and delivering a stable 300mA output, it seamlessly integrates into automated control systems, enhancing machine accuracy and reliability.

## 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.

Review: Well - Good
Review: Perfect - Worked great. Allows enough current for a 12 volt automotive relay to work. Was able to fit in with a handmade bracket to the shift gate of the stock Can-Am X3 to allow for reverse lights to come on automatically when put in the reverse position.

## 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/AY;Theory : Inductive Sensor;Output Type: PNP NC;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 |
|---------------|-------|
| ASIN | B07P2KTHK8 |
| Best Sellers Rank | #101,882 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Inductive Proximity Sensors |
| Date First Available | February 23, 2019 |
| Item Weight | 1.41 ounces |
| Item model number | JND-LJ12A3-4-Z/AY |
| Manufacturer | Twidec |
| Package Dimensions | 5.91 x 3.39 x 0.75 inches |

## Images

![Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NC DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/AY - Image 1](https://m.media-amazon.com/images/I/51Jg-Mkk13L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well
*by F***E on June 22, 2025*

Good

### ⭐⭐⭐⭐⭐ Perfect
*by B***T on February 22, 2023*

Worked great. Allows enough current for a 12 volt automotive relay to work. Was able to fit in with a handmade bracket to the shift gate of the stock Can-Am X3 to allow for reverse lights to come on automatically when put in the reverse position.

### ⭐⭐⭐⭐⭐ Using this sensor with a Monoprice Select V2
*by D***L on May 8, 2019*

I purchased this inductive sensor as a bed leveling sensor for my Monoprice Select V2. After upgrading the Marlin firmware and making a few changes in the Configuration.h tab I got the sensor to work. I connected the sensor to an Arduino Uno powered with a 9v battery. The sensor is being powered with the input voltage (9v) which gives the sensor enough of a sensing distance that the sensor could be places slightly higher than the hotend nozzle (.12mm). This setup supplied enough voltage to the sensor to get it to detect the aluminum print bed. The higher the input voltage to the sensor the greater the detection distance. I will be trying a voltage divider where the sensor connects to the the Arduino Uno so I can get a higher voltage through the sensor and a lower voltage to the arduino and MKS Gen L board.

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-26*