---
product_id: 53971180
title: "Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1)"
brand: "heschen"
price: "₱1238"
currency: PHP
in_stock: true
reviews_count: 8
url: https://www.desertcart.ph/products/53971180-heschen-m12-inductive-proximity-sensor-switch-non-shield-type-lj12a3
store_origin: PH
region: Philippines
---

# IP67 waterproof & dustproof 4mm precise detection range 10-30V wide voltage compatibility Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1)

**Brand:** heschen
**Price:** ₱1238
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your automation game with precision sensing that just works!

## Quick Answers

- **What is this?** Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1) by heschen
- **How much does it cost?** ₱1238 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/53971180-heschen-m12-inductive-proximity-sensor-switch-non-shield-type-lj12a3)

## Best For

- heschen enthusiasts

## Why This Product

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

## Key Features

- • **Pinpoint Accuracy:** Detects metal objects with a sharp 4mm sensing distance ±10%, ensuring flawless automation.
- • **Durable & Reliable:** IP67-rated protection guarantees performance in harsh environments—rain or dust won’t slow you down.
- • **Visual Confirmation:** Red LED indicator instantly confirms sensor status, eliminating guesswork during installation and operation.
- • **Robust Voltage Range:** Operates seamlessly between 10-30VDC, compatible with diverse industrial setups and DIY projects.
- • **Plug & Play Integration:** Built-in short-circuit and reverse polarity protection for hassle-free connection directly to PLCs or controllers.

## Overview

The Heschen M12 Inductive Proximity Sensor Switch offers a compact 12mm mounting design with a reliable 4mm detection range for magnetic metals. It supports a broad 10-30VDC input and delivers up to 200mA current output with NPN Normally Open configuration. Featuring IP67 protection, built-in short-circuit and reverse polarity safeguards, plus a red LED status indicator, it’s engineered for robust, accurate sensing in industrial and DIY applications alike.

## Description

Power supply reversal connection protection; short-circuit protection, can directly connect with PLCUsed in common places with medium enviroment resistanceRed LED indicates that it's available to detect the sensor operation stateEconomic and simple operationWidely used, can be substitution of min-type switch and limit switchIP 67 protection

Review: Inductive Proximity Sensor - Product as described. Works very well with good sensing range and tested at both 12v and 24v DC operation.
Review: Accurate and runs on 5v - Bought one of these to use as a sensor on my 3D printer. I have read a lot about inductive sensors needing 12v supply and needing voltage dividers to use on your printer without frying the chip so before doing any of that i powered this via a 5v USB supply, took measurements with a multimeter (Photos attached). I was getting 5.14v as supply, the sensor was reading 4.5v in the untriggred state (0.6v drop from diode/transistor switch is expected) and drops to 0v in the triggered state. Took some measurements of trigger distances and was getting a solid and repeatable 4mm with steel and about 2mm with aluminium (again exected given the lower inductive properties of aluminium). So this will work nicely as a 3d printer sensor, but you have to bear in mind the distances, if you are using an aluminium heat bed with a glass plate, then you aren't going to be able to get close enough to the bed to get a trigger, steel sheet on a magnetic bed won't be an issue. If you have something like painters tape on top of the alu bed, it should work as you should be able to get close enough but i haven't tested. Overall though it's a decent sensor, seems happy enough at 5v

## Features

- Mounting Hole Diameter: 12mm; Cable Length: 120cm/48"
- Detecting Distance: 4mm±10%; Set Distance: 0-3.6mm
- Output Type: NPN NO(Normally Open); Non-shield Type
- Current Output: 200mA; Working Voltage: 10-30 VDC
- Detect Object: Magnetic Metal

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071ZQ6VV6 |
| Actuator Type | Push Button |
| Best Sellers Rank | 52,542 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 26 in Inductive Proximity Sensors |
| Brand | Heschen |
| Circuit Type | 3-way |
| Colour | Blue |
| Connectivity Protocol | Bluetooth |
| Connector Type | Crimp, Screw In |
| Connector type | Crimp , Screw In |
| Contact Material | Copper |
| Contact Type | Normally Open |
| Contact type | Normally Open |
| Control Method | Remote |
| Controller Type | Push Button |
| Current Rating | 200 Milliamps |
| Current rating | 200 Milliamps |
| Customer Reviews | 4.4 out of 5 stars 383 Reviews |
| International Protection Rating | IP67 |
| Manufacturer | Heschen Electric Co.Ltd |
| Material | Metal |
| Model Number | HS-LJ12A3-4-Z/BX |
| Mounting Type | Panel Mount |
| Number of Items | 1 |
| Number of Positions | 2 |
| Operating Voltage | 30 Volts |
| Operating voltage | 30 Volts |
| Operation Mode | automatic |
| Operation mode | automatic |
| Specification Met | IP67 |
| Switch Type | Limit Switch |
| Terminal | Screw |
| UPC | 670534170786 |
| Unit Count | 1.0 count |
| Wattage | 6 watts |

## Product Details

- **Brand:** Heschen
- **Circuit type:** 3-way
- **Connector type:** Crimp, Screw In
- **Contact type:** Normally Open
- **Current rating:** 200 Milliamps
- **Material:** Metal
- **Operating voltage:** 30 Volts
- **Operation mode:** automatic
- **Switch type:** Limit Switch
- **Terminal:** Screw

## Images

![Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1) - Image 1](https://m.media-amazon.com/images/I/61JhN6VUm9L.jpg)
![Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1) - Image 2](https://m.media-amazon.com/images/I/6114qIKtuXL.jpg)
![Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1) - Image 3](https://m.media-amazon.com/images/I/51nOmMYfZlL.jpg)
![Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1) - Image 4](https://m.media-amazon.com/images/I/61KsDPEOmYL.jpg)
![Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BX, Detector 4mm, 10-30VDC 200mA, NPN Normally Open(NO), 3 Wire (1) - Image 5](https://m.media-amazon.com/images/I/61YqEZZUfnL.jpg)

## Available Options

This product comes in different **Item Package Quantity** options.

## Questions & Answers

**Q: could you tell me the operating frequency please i need at least 220hz**
A: This is a inductive proximity detector and it is DC voltage.. no frequency involved.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Inductive Proximity Sensor
*by A***R on 11 January 2024*

Product as described. Works very well with good sensing range and tested at both 12v and 24v DC operation.

### ⭐⭐⭐⭐⭐ Accurate and runs on 5v
*by S***R on 3 August 2021*

Bought one of these to use as a sensor on my 3D printer. I have read a lot about inductive sensors needing 12v supply and needing voltage dividers to use on your printer without frying the chip so before doing any of that i powered this via a 5v USB supply, took measurements with a multimeter (Photos attached). I was getting 5.14v as supply, the sensor was reading 4.5v in the untriggred state (0.6v drop from diode/transistor switch is expected) and drops to 0v in the triggered state. Took some measurements of trigger distances and was getting a solid and repeatable 4mm with steel and about 2mm with aluminium (again exected given the lower inductive properties of aluminium). So this will work nicely as a 3d printer sensor, but you have to bear in mind the distances, if you are using an aluminium heat bed with a glass plate, then you aren't going to be able to get close enough to the bed to get a trigger, steel sheet on a magnetic bed won't be an issue. If you have something like painters tape on top of the alu bed, it should work as you should be able to get close enough but i haven't tested. Overall though it's a decent sensor, seems happy enough at 5v

### ⭐⭐⭐⭐⭐ Works for me at 5V
*by P***E on 3 November 2019*

Plugged this straight into the endstop pin on my Ramps board, seems to power up fine and detects my aluminium heated bed at about 4mm. Since it's powered by 5v there was no need for a voltager divider/level shifter, which is handy.

## Frequently Bought Together

- Heschen M12 Inductive Proximity Sensor Switch Non-Shield Type LJ12A3-4-Z/BX Detector 4mm 10-30VDC 200mA NPN Normally Open(NO) 3 Wire
- FREEDARE Skateboard Wheels 54mm and Bearings Set for Street Tricks (Pack of 4)
- Baomain Standard Cylinder SC 63 X 250 G3/8 Bore: 2-1/2 inch, Stroke: 10 inch, Screwed Piston Rod Double-Action and 2Pcs Fittings

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.ph/products/53971180-heschen-m12-inductive-proximity-sensor-switch-non-shield-type-lj12a3](https://www.desertcart.ph/products/53971180-heschen-m12-inductive-proximity-sensor-switch-non-shield-type-lj12a3)

---

*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-05-24*