What is the voltage requirement for the LJ12A3-4-ZBX Inductive Proximity Sensor?

The LJ12A3-4-ZBX inductive proximity sensor operates at a voltage of DC 5V. This voltage is required to power the sensor and ensure it functions correctly. Additionally, its low voltage requirement makes it compatible with various electronics and microcontrollers, including those used in 3D printers and CNC machines. Using this sensor helps achieve precise bed leveling, crucial for quality 3D prints.

What does NPN and NO mean in the context of this sensor?

NPN refers to the type of output transistor used in the sensor, which means it connects to the ground when activated. NO stands for Normally Open, indicating that the circuit is open when the sensor is not activated. When a metal object is detected, the circuit closes. This configuration is widely used in automation projects, enabling triggering operations like stopping a motor or activating a warning light.

How does an inductive proximity sensor work?

An inductive proximity sensor works by generating an electromagnetic field around its detection zone. When a metallic object enters this field, it alters the field and triggers the sensor to send a signal. This technology is effective in non-contact applications, making it ideal for environments where physical switches may wear out or fail due to debris. Users often implement this sensor for automatic bed leveling in 3D printers, ensuring precise results without constant manual adjustments.

Can the sensor be used with different types of CNC machines?

Yes, the LJ12A3-4-ZBX inductive proximity sensor is versatile and compatible with various CNC machines. Due to its compact size and low voltage operation, it can be used for tasks like probing, material detection, and safety shutdowns. This flexibility allows machine operators to enhance precision in milling, routing, or drilling applications by integrating the sensor into their setups.

What is the sensing distance of the LJ12A3-4-ZBX sensor?

The sensing distance of the LJ12A3-4-ZBX sensor varies based on the material being detected, generally around 4mm for metal objects. The effective distance can decrease with non-metallic materials. Understanding the sensing range is crucial for setting up the sensor correctly in applications like 3D printing, where it helps ensure the print head maintains the correct height above the build platform for optimal adhesion and quality.

Is this sensor suitable for outdoor use?

The LJ12A3-4-ZBX inductive proximity sensor is primarily designed for indoor applications. While it can tolerate some environmental factors, exposure to harsh outdoor conditions, like moisture or extreme temperatures, can affect its performance. If using outdoors, consider implementing a protective housing to shield the sensor, thereby ensuring reliable operation in applications like automatic door systems or outdoor machinery monitoring.

What types of materials can be detected by this proximity sensor?

This inductive proximity sensor is designed to detect metallic objects effectively. Commonly detected materials include ferrous and non-ferrous metals such as iron, aluminum, and copper. Its ability to sense metal makes it ideal for applications in industrial automation, such as detecting metal workpieces in CNC machines, enhancing operational safety and efficiency.

How might I install the LJ12A3-4-ZBX sensor in my 3D printer?

Installing the LJ12A3-4-ZBX sensor in a 3D printer involves mounting it at the print head's position where it can detect the bed's surface. Connect its wires to the motherboard following the pin configuration for NPN NO sensors. This setup allows the printer to automatically probe the bed to establish the correct Z height, ensuring consistent print quality across different layers.

Can I use multiple sensors simultaneously with my CNC machine?

Yes, you can use multiple LJ12A3-4-ZBX sensors with your CNC machine. Multiple sensors can enhance functionality, such as adding additional safety features or automating more complex processes. Ensure that your control unit can handle multiple input signals, allowing efficient integration for improved operation and workflow in manufacturing tasks.

How to Shop 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Online From Ubuy?

It’s easy to shop 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.

Is 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Available to Shop Online in Wallis and Futuna Islands?

Yes, at Ubuy Wallis and Futuna Islands this product is available for you to shop at a reasonable price. The 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX is not available locally but you can trust us with our express shipping services.

How Long Does It Take to Get Product After Placing the Order?

The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

POLISI3D

2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Inductive Proximity Sensor Switch for 3D Printer CNC Z Probe auto Bed Leveling

This capacitive type proximity switch can detect conductor, liquid and powder objects. It has wide applications in machine, paper making, and light industry

POLISI3D

Item #: 26824207

2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Inductive Proximity Sensor Switch for 3D Printer CNC Z Probe auto Bed Leveling

Q: Where can I buy 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-ZBX Inductive Proximity Sensor Switch?

You can buy the 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-ZBX from Ubuy in Wallis and Futuna Islands. Ubuy offers a convenient online shopping experience, ensuring you access a wide range of products, including this sensor. Their platform provides detailed product descriptions and user reviews, helping you make an informed purchasing decision for your projects.

77% of respondents would recommend this to a friend

Item #: 26824207

XPF 2097

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

^{*All items will import from US}

Availability : In stock

Imported from USA store

QTY:

Order now and get it around Wednesday, October 28

Secured transaction

Our Top Logistics Partners

This capacitive type proximity switch can detect conductor, liquid and powder objects. It has wide applications in machine, paper making, and light industry

U-Care Warranty:

None

Select a Plan

Fast
Shipping

Free
Return^*

Secure Packaging

100% Original Products

PCI DSS Compliance

ISO 27001 Certified

Note: Step 1 Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.

What Stands Out

Precision Sensing

These inductive sensors provide high accuracy in detecting metal objects, ensuring reliable bed leveling for 3D printers and CNC machines, improving print quality and overall user experience.

Easy Installation

Designed for straightforward integration, these sensors simplify the setup process for auto bed leveling, reducing installation time and allowing users to focus on their projects effortlessly.

Durable Design

Featuring robust construction and corrosion-resistant materials, these sensors ensure long-lasting performance, making them ideal for various applications in 3D printing and CNC machining.

Product Details

Capacitive type proximity switch widely used in automatic control industry
Ideal for 3D printer auto leveling and noncontact switching
Detects various objects including conductor, liquid, and powder materials
Commonly used in machine, paper making, and light industry applications
3 Wire Polarity: NPN Detection; DC 5V; Brown → +5V, Blue → GND, Black → Signal (Zmin)
Specifications: Detection Distance: 4mm, Voltage: DC 5V, Output current: 150MA, Dimention: 12 x 60mm

Who Should Buy?

3D Printers
Ideal for users needing reliable auto bed leveling in 3D printers for improved print accuracy and consistency.
CNC Machinists
Beneficial for CNC machine operators seeking precise measurements and automation in various machining operations.
DIY Enthusiasts
Perfect for hobbyists customizing projects requiring proximity sensing to enhance automation and functionality.

Non-Technical Users
May be unsuitable for users lacking technical knowledge needed for installation and integration into existing setups.

Product Description

2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Inductive Proximity Sensor Switch for 3D Printer CNC Z Probe auto Bed Leveling

About This Item

Introducing the 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-ZBX Inductive Proximity Sensor Switch - the perfect solution for all your 3D printer CNC Z Probe auto bed leveling needs! With a detection distance of 4mm and a voltage of DC 5V, this inductive proximity sensor provides reliable and efficient non-contact sensing for your 3D printer and CNC machine. The LJ12A3-4-ZBX sensor is designed with an output current of 150MA and a polarity of NPN, making it a perfect fit for your automation needs. Measuring at 12 x 60mm, this package includes 2 pieces of inductive proximity sensors that are easy to install and use. Whether you're looking for an inductive sensor for your CNC machine or a 3D printer sensor, the LJ12A3-4-ZBX 3D printer sensor and LJ12A3-4-ZBX CNC machine sensor are the perfect choice for you. Upgrade your 3D printing and CNC automation with the LJ12A3-4-ZBX inductive proximity switch.

Order now and experience the convenience of non-contact sensing for your 3D printing and CNC applications!.

Have any Query? Chat with us

Customer Questions & Answers

Question: How to Shop 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Online From Ubuy?

Answer: It’s easy to shop 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX online from Ubuy. You just have to search for the product, choose your shipping method while checking out and get it delivered to your location.
Question: Is 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Available to Shop Online in Wallis and Futuna Islands?

Answer: Yes, at Ubuy Wallis and Futuna Islands this product is available for you to shop at a reasonable price. The 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX is not available locally but you can trust us with our express shipping services.
Question: How Long Does It Take to Get Product After Placing the Order?

Answer: The delivery time of your ordered product varies as per what you've ordered and the shipping method that you've chosen. The estimated delivery time is mentioned during the checkout process, so be carefree while shopping.

POLISI3D Inductive Editorial Review

The 2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-ZBX Inductive Proximity Sensor Switch has received mixed reviews from customers. While some users found that it worked well for their intended applications, others were disappointed with its limited detection capabilities. The sensor is designed for metal detection and may not be suitable for detecting non-conductive objects. The range of the sensor is sufficient, but some users felt that it could be larger. Additionally, the sensor may not work with a glass print surface. Overall, the sensor has been found to work as described for metal detection, but its performance may vary depending on the specific application.

Customer Reviews & Ratings

5.0

1 customers ratings

5 Star

100%
4 Star

0%
3 Star

0%
2 Star

0%
1 Star

0%

Review this product

Share your thoughts with other customers

Pros

Works well for metal detection
Sufficient sensor range
Easy to connect without additional hardware

Cons

Limited detection capabilities for non-conductive objects

Platform Trust & Buyer Confidence

4.2/5 9704 reviews

Read reviews

Jasmin

Verified buyer

“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot

Anke

Verified buyer

“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot

Hazel

Verified buyer

“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

10 September 2026 · via Trustpilot

Opaleye

Verified buyer

“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot

Adele

Verified buyer

“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot

WHY SHOP WITH US

Secure Checkout Global Delivery Easy Returns Genuine Products

Product Price History

Important information

Limitations : For products shipped internationally, please note that any manufacturer warranty may not be valid; manufacturer service options may not be available; product manuals, instructions, and safety warnings may not be in destination country languages; the products (and accompanying materials) may not be designed in accordance with destination country standards, specifications, and labeling requirements; and the products may not conform to destination country voltage and other electrical standards (requiring use of an adapter or converter if appropriate). The recipient is responsible for assuring that the product can be lawfully imported to the destination country. When ordering from Ubuy or its affiliates, the recipient is the importer of record and must comply with all laws and regulations of the destination country.
Not all the products listed on Ubuy are for sale, as Ubuy is a global search engine. Products are subject to export/trade regulations.

XPF 2097

Order now and get it around Wednesday, October 28

QTY:

Secured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners

Fastest cross-border delivery

Features & Benefits

Detects conductor, liquid and powder objects
Widely used in various industries
Capacitive type proximity switch
3 Wire Polarity: NPN Detection; DC 5V
Package contains 2pcs
Dimension: 12 x 60mm

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns ^*, and secure packaging on every order.

2pcs DC 5V NPN NO M12 4mm Sensor LJ12A3-4-Z/BX Inductive Proximity Sensor Switch for 3D Printer CNC Z Probe auto Bed Leveling

XPF 2097

Fast Shipping

Free Return*

Secure Packaging

100% Original Products

PCI DSS Compliance

ISO 27001 Certified

What Stands Out

Product Details

Who Should Buy?

Product Description

About This Item

Customer Questions & Answers

POLISI3D Inductive Editorial Review

Customer Reviews & Ratings

Review this product

Pros

Cons

Platform Trust & Buyer Confidence

WHY SHOP WITH US

Product Price History

Important information

XPF 2097

Features & Benefits

Ubuy Assurance

Fast
Shipping

Free
Return^*