--- product_id: 87479566 title: "2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V" price: "₪69" currency: ILS in_stock: true reviews_count: 8 url: https://www.desertcart.co.il/products/87479566-2pcs-lj12a3-4-z-ax-proximity-switch-inductive-proximity-sensor store_origin: IL region: Israel --- # Wide 6-36V DC voltage compatibility 4mm precise detection range Robust M12 metal cylinder housing 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V **Price:** ₪69 **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your automation game with precision and style! ## Quick Answers - **What is this?** 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V - **How much does it cost?** ₪69 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.il](https://www.desertcart.co.il/products/87479566-2pcs-lj12a3-4-z-ax-proximity-switch-inductive-proximity-sensor) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Wiring:** Color-coded 3-wire system simplifies installation and integration with Arduino, CNC, and more. - • **Durable Metal Shell:** Sleek, corrosion-resistant M12 cylindrical design built to last in demanding environments. - • **Universal Voltage Range:** Operates seamlessly from 6V to 36V DC, perfect for diverse industrial and DIY projects. - • **Precision Sensing at 4mm:** Detects metal objects with pinpoint accuracy to optimize your automation setup. - • **NPN Normally Closed Output:** Ensures safer, contactless switching for reliable and fail-safe machine control. ## Overview The Taiss LJ12A3-4-Z/AX is a high-performance inductive proximity sensor featuring a 4mm detection range, NPN normally closed output, and a robust M12 metal housing. Compatible with DC voltages from 6 to 36V and supporting up to 300mA output current, this sensor is ideal for precise, contactless metal detection in industrial automation, CNC machines, and DIY electronics. The included 2-pack offers easy wiring and reliable performance, making it a must-have for professionals seeking accuracy and durability. ## Description Description: Case material: Metal / Copper Output Status: Normally Close Detection objects: Conductor Voltage: DC 6-36V Output Current: 300mA Polarity: NPN Dimension: M12x1x55mm Detection Distance: 4 mm Part number: LJ12A3-4-Z/AX Three wires wiring connection: Brown is connected to the positive power supply. Blue is connected to the negative power supply. Black is connected to the load. Package Included: 2X Inductive Proximity Sensor Detection Switch Review: Exactly as described - I ordered the two-pack and received both, well packaged. Handy wiring info attached to the harness. I bench tested the sensors and they triggered down to 4 VDC, so I was encouraged that they would work with my 5V Arduino controlled CNC router. I used the first one as a Limit/Homing switch for an upgraded Z axis. Now that I know they work for my intended purpose, I'll be ordering another two-pack to upgrade the other axes from the original mechanical, normally-open limit switches to these normally-closed inductive switches. A NC setup is safer and contactless switches are more accurate, so a win-win for me. Two bonuses are these look awesome on my project, and they have a wide range of adjustability, so mounting them is a snap. Review: Works on 5v, senses aluminum within 3mm - Works exactly as described. Using these for all 4 limits on a custom CNC build, they’re working flawlessly on the 5v of the Flexihal breakout. They seem to trigger around ~3mm and are fast enough to stop a crash at 500ipm ## Features - Product Name : Inductive Proximity Switch;Model : LJ12A3-4-Z/AX;Theory : Inductive Sensor;Wire Type : 3 Wire Type (Brown, Blue, Black) - Switch Appearance Type : Cylinder Type, Metal Shell;Output Type : NPN NC; - Detecting Distance : 4mm(+/-10%);Supply Voltage : DC 6-36V Output Current : 300mA;Detect Object : Iron;Column Sensor Diameter : 10.4mm/0.4";Thread Diameter : 12mm/0.5" - Total Size : 66 x 21mm/ 2.6'' x 0.8'' (L*Max.D);Cable Length : 1.16m/35.7'';External Material : Plastic, Metal - Net Weight :100g;Color : Blue Tone, Black ;Package Content : 2 x Inductive Proximity Switch ## Technical Specifications | Specification | Value | |---------------|-------| | Customer Reviews | 4.2 out of 5 stars 80 Reviews | ## Images ![2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V - Image 1](https://m.media-amazon.com/images/I/71ZBJ1nVdnL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: dumb question but does this only detect proximity of metal or magnetic device or would it detect a human finger being used as no-touch switch?** A: Metal only. It does detect any metal however. **Q: Is it waterproof?** A: It is sealed and stainless so it is very water resistant. It's not made to be submersed in water, though it could last for a time underwater. The sensor can take a light stream of water, but would likely fail under high pressure washdown over time. **Q: How sensitive is this switch to aluminum? 4mm? 2mm? Thanks** A: Distance or thickness of material? I was able to trip it with a small aluminum tube but it had to make physical contact with the center of the switch. **Q: it is assumed sensor has voltage applied; is sensor closed then opens when tripped?** A: Depends on if it a normally open or normally closed sensor. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Exactly as described *by L***Y on February 10, 2025* I ordered the two-pack and received both, well packaged. Handy wiring info attached to the harness. I bench tested the sensors and they triggered down to 4 VDC, so I was encouraged that they would work with my 5V Arduino controlled CNC router. I used the first one as a Limit/Homing switch for an upgraded Z axis. Now that I know they work for my intended purpose, I'll be ordering another two-pack to upgrade the other axes from the original mechanical, normally-open limit switches to these normally-closed inductive switches. A NC setup is safer and contactless switches are more accurate, so a win-win for me. Two bonuses are these look awesome on my project, and they have a wide range of adjustability, so mounting them is a snap. ### ⭐⭐⭐⭐⭐ Works on 5v, senses aluminum within 3mm *by K***R on July 23, 2025* Works exactly as described. Using these for all 4 limits on a custom CNC build, they’re working flawlessly on the 5v of the Flexihal breakout. They seem to trigger around ~3mm and are fast enough to stop a crash at 500ipm ### ⭐⭐⭐⭐⭐ bruno *by D***L on September 15, 2025* calidad excelente, duras, resistentes ## Frequently Bought Together - Taiss 2pcs LJ12A3-4-Z/AX Proximity Switch Inductive Proximity Sensor Detection Switch NPN NC DC 6V-36V 4mm Normally Close 6-36V - mxuteuk 2pcs JQX-13FL DC 12V Coil 8 Pin 10A DPDT LED Indicator Electromagnetic Power Relay, with Base, with DIN Rail Slotted Aluminum - Electromagnetic Power Relay, 8-Pin 10 AMP 24V DC Relay Coil with Socket Base, LED Indicator, DPDT 2NO 2NC - MY5NJ 2PCS [Applicable for DIN Rail System] --- ## 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.il/products/87479566-2pcs-lj12a3-4-z-ax-proximity-switch-inductive-proximity-sensor](https://www.desertcart.co.il/products/87479566-2pcs-lj12a3-4-z-ax-proximity-switch-inductive-proximity-sensor) --- *Product available on Desertcart Israel* *Store origin: IL* *Last updated: 2026-06-15*