--- product_id: 140659521 title: "Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY" price: "β‚±1345" currency: PHP in_stock: true reviews_count: 8 url: https://www.desertcart.ph/products/140659521-twidec-m12-approach-sensor-inductive-proximity-switch-pnp-no-dc store_origin: PH region: Philippines --- # 300mA Output 4mm Detecting Distance DC 6-36V Supply Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY **Price:** β‚±1345 **Availability:** βœ… In Stock ## Summary > πŸ” Discover Precision Like Never Before! ## Quick Answers - **What is this?** Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY - **How much does it cost?** β‚±1345 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/140659521-twidec-m12-approach-sensor-inductive-proximity-switch-pnp-no-dc) ## 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 - β€’ **Compact Size:** With a sleek diameter of just 12mm, this sensor fits seamlessly into tight spaces. - β€’ **Robust Design:** Crafted with durable plastic and alloy materials, built to withstand the rigors of any environment. - β€’ **Easy Installation:** Comes with a 1.2m cable for hassle-free installation, making it a breeze to integrate into your systems. - β€’ **Precision Detection:** Experience reliable sensing with a 4mm detection range, perfect for industrial applications. - β€’ **Versatile Voltage Range:** Compatible with a wide voltage range of DC 6-36V, ensuring flexibility in various setups. ## Overview The Twidec/M12 Approach Sensor Inductive Proximity Switch is a high-performance sensing solution designed for industrial applications. With a robust design, versatile voltage compatibility, and a compact size, it ensures reliable detection of metallic objects within a 4mm range. Ideal for professionals seeking efficiency and precision in their operations. ## 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: 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. Review: Works with Ender 3 + some external components - Like - light weight ~ 45g, flexible wire, repeatable , reasonable price. M48 P9 test Mean: -0.110833 Min: -0.113 Max: -0.108 Range: 0.005 Standard Deviation: 0.001667 I used the Ender 3 24V as power source. I chose the PNP model so the output is 24V. I used a voltage divider ( 4.7K and 1K ) to reduce the voltage. Only two issues - You need a metal build surface , I use PEI on spring steel, You need to make a voltage divider to connect it to the Z_End_Stop on the ENDER 3 control board. ## 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/BY;Theory : Inductive Sensor;Output Type: PNP 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 | |---------------|-------| | Customer Reviews | 4.5 out of 5 stars 80 Reviews | ## Images ![Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY - Image 1](https://m.media-amazon.com/images/I/71-zuSIU4jL.jpg) ![Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY - Image 2](https://m.media-amazon.com/images/I/71IVV-H9kPL.jpg) ![Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY - Image 3](https://m.media-amazon.com/images/I/81miYGJty6L.jpg) ![Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY - Image 4](https://m.media-amazon.com/images/I/71eD4DVNrgL.jpg) ![Twidec/M12 Approach Sensor Inductive Proximity Switch PNP NO DC 6-36V, 4mm Detecting Distance LJ12A3-4-Z/BY - Image 5](https://m.media-amazon.com/images/I/81RUURGU-cL.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 ## Customer Reviews ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ Works with Ender 3 + some external components *by S***M on July 13, 2020* Like - light weight ~ 45g, flexible wire, repeatable , reasonable price. M48 P9 test Mean: -0.110833 Min: -0.113 Max: -0.108 Range: 0.005 Standard Deviation: 0.001667 I used the Ender 3 24V as power source. I chose the PNP model so the output is 24V. I used a voltage divider ( 4.7K and 1K ) to reduce the voltage. Only two issues - You need a metal build surface , I use PEI on spring steel, You need to make a voltage divider to connect it to the Z_End_Stop on the ENDER 3 control board. ### ⭐⭐⭐⭐⭐ Well *by F***E on June 22, 2025* Good --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ph/products/140659521-twidec-m12-approach-sensor-inductive-proximity-switch-pnp-no-dc](https://www.desertcart.ph/products/140659521-twidec-m12-approach-sensor-inductive-proximity-switch-pnp-no-dc) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-05-21*