--- product_id: 650459240 title: "M12 Inductive Proximity Sensor Switch Shield Type LJ12A3-4-Z/BY Detector 4 mm 10-30VDC 200mA PNP Normally Open (NO) 3-Wire" brand: "heschen" price: "£20.83" currency: GBP in_stock: true reviews_count: 5 category: "Heschen" url: https://www.desertcart.co.uk/products/650459240-m12-inductive-proximity-sensor-switch-shield-type-lj12a3-4-z store_origin: GB region: United Kingdom --- # 200 mA current output 4 mm detection range 10-30 VDC operating voltage M12 Inductive Proximity Sensor Switch Shield Type LJ12A3-4-Z/BY Detector 4 mm 10-30VDC 200mA PNP Normally Open (NO) 3-Wire **Brand:** heschen **Price:** £20.83 **Availability:** ✅ In Stock ## Summary > 🔍 Elevate your automation game with pinpoint precision and rock-solid reliability! ## Quick Answers - **What is this?** M12 Inductive Proximity Sensor Switch Shield Type LJ12A3-4-Z/BY Detector 4 mm 10-30VDC 200mA PNP Normally Open (NO) 3-Wire by heschen - **How much does it cost?** £20.83 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/650459240-m12-inductive-proximity-sensor-switch-shield-type-lj12a3-4-z) ## 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 - • **Built-in Protection:** Reverse polarity and short circuit safeguards ensure worry-free integration. - • **Robust 200mA Output:** Delivers reliable current output to power your control systems effortlessly. - • **IP67 Rated Durability:** Dust-tight and waterproof for consistent performance in demanding environments. - • **Precision Sensing at 4 mm:** Detect iron objects with pinpoint accuracy for flawless automation. - • **Wide Voltage Compatibility:** Operates seamlessly between 10-30 VDC to fit diverse industrial setups. ## Overview The Heschen M12 Inductive Proximity Sensor Switch (LJ12A3-4-Z/BY) offers a 4 mm detection distance with PNP normally open output, operating on 10-30 VDC and delivering 200 mA current. Designed for iron object detection, it features reverse polarity and short circuit protection, an LED status indicator, and an IP67 rating for dust and water resistance, making it a versatile, durable choice for industrial automation and PLC integration. ## Description Protection for reverse connection of the power source; short circuit protection, can be directly connected to a PLC. Used in common places with medium environmental resistance. The red LED indicates that the operating status of the sensor can be detected Easy and cost-effective operation Widely used, can replace the minute switch and limit switch. Protection class IP 67. Review: Buen Producto, buen precio y gran calidad. Cumple su función perfectamente. Review: Preis-Leistungsverhältnis perfekt. ## Features - Mounting hole diameter: 12 mm - Detection distance: 4 mm - Operating voltage: 10-30 VDC, current output: 200 mA - Output Type: PNP NO (Normally Open) - Detect Object: Iron ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B071FR2R85 | | Antenna Location | Industrial Automation, Intrusion Detection, Automated Machines | | Battery Description | Battery not included | | Brand | Heschen | | Color | Red | | Compatible Devices | PLC, Garage Door Opener | | Customer Reviews | 4.4 4.4 out of 5 stars (137) | | Manufacturer | Heschen Electric Co.Ltd | | Maximum Range | 4 Millimeters | | Mfr Part Number | LJ12A3-4-Z/BY | | Model Number | HS-LJ12A3-4-Z/BY | | Mounting Type | Pole Mount | | Power Source | Battery Powered | | Smart Home Compatibility | Not Smart Home Compatible | | Temperature Range | -2E+1 Degrees Celsius | | UPC | 670534170779 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Heschen - **Colour:** Red - **Maximum range:** 4 Millimeters - **Mounting type:** Pole Mount - **Power source:** Battery Powered ## Images ![M12 Inductive Proximity Sensor Switch Shield Type LJ12A3-4-Z/BY Detector 4 mm 10-30VDC 200mA PNP Normally Open (NO) 3-Wire - Image 1](https://m.media-amazon.com/images/I/61XwXWwJ0SL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by G***A on 17 April 2026* Buen Producto, buen precio y gran calidad. Cumple su función perfectamente. ### ⭐⭐⭐⭐⭐ Review *by A***H on 4 May 2025* Preis-Leistungsverhältnis perfekt. ### ⭐⭐⭐⭐⭐ Review *by G***O on 28 January 2026* Détecteur correspond à mes besoins; Très bon rapport qualité-prix. Vue son coût par rapport à d'autres, vieillira t-il ???? ## Frequently Bought Together - Heschen M12 Inductive Proximity Sensor Switch, Non-shield Type, LJ12A3-4-Z/BY Detector, 4mm, 10-30 VDC, 200mA, PNP NO, 3 Wire, Magnetic Metal, IP67, Blue - 2Pcs LJ12A3-4-Z/AY M12 Approach Sensor Inductive Proximity Sensor Switch Detector Non-Shield Type PNP NC DC 6-36V 200mA 4mm Detecting Distance 3 Wire for 3D Printer Probe Bed Leveling,MCU Board --- ## 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.co.uk/products/650459240-m12-inductive-proximity-sensor-switch-shield-type-lj12a3-4-z](https://www.desertcart.co.uk/products/650459240-m12-inductive-proximity-sensor-switch-shield-type-lj12a3-4-z) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-21*