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Inductive Proximity Switch,It is a component widely used in automatic control industry for detecting, controlling, and noncontact switching. When proximity switch is close to some target object, it will send out control signal. Over-current and short circuit protection, with LED indicate, easily identifiable.
Specifications
Inductive Proximity Switch;
Model : LJ12A3-4-Z-BX 5V ;
Wire Type : 3 Wire Type (Black, Brown, Blue);
Switch Appearance Type : Cylinder Type
Theory : Inductive Sensor;
Output Type : NPN NO(Normal Open);
Thread Diameter : 10.5mm/0.41"";
Head Diameter : 11.8mm/0.46""
Detecting Distance : 4mm;
Supply Voltage : DC 5V;
Current Output : 300mA;
Response Frequency : 150Hz
Detect Object : Iron;Operating Temperature : -25?°C to +55?°C (Non-freezing Condition);
Size : 6.2 x 2cm/2.4'' x 0.8'' (L*Max. Dia);
Cable Length : 110cm/43.3""
External Material : Plastic, Alloy;
Net Weight : 44g;
Package Included:
1pcs Replacement LJ12A3-4-Z/BX Inductive Proximity Sensor Switch 3-Wire NPN DC6-36V
Gimli
Reviewed in Canada on April 15, 2025
I have not yet used this in a project, but I tested it and it does activate at around 4mm to a ferrous surface.I tested it with a 12V of power. It's specified for 6-36V in the product title, but the product details state that the operating voltage is 5V. One star off for this discrepancy.
Gregory S.
Reviewed in the United States on December 26, 2023
If you're a 3D printer enthusiast yearning for precise and hassle-free auto bed leveling, especially with a metal build plate, then the DEVMO LJ12A3-4-Z/BX Inductive 4mm Normally Open Proximity Sensor deserves a prominent spot on your upgrade list.Why? Let's dive in:Metal Master: Unlike its optical counterparts, which are easily fooled by shiny surfaces, this inductive sensor works flawlessly with metal build plates, the preferred choice for many advanced filaments. No more struggling with inconsistent bed leveling due to reflectivity!Image of DEVMO LJ12A34Z/BX Inductive 4mm Normally Open Proximity SensorOpens in a new windowwww.amazon.comDEVMO LJ12A34Z/BX Inductive 4mm Normally Open Proximity SensorPrecision Point: Boasting a detection range of 4mm and an accuracy of ±0.05mm, this sensor ensures your nozzle touches the bed at the exact intended point, leading to flawless first layers and consistent print quality across the entire build plate.Simple Setup: Installation is a breeze. The sensor comes with a pre-wired cable and mounting brackets, making it easy to integrate into your existing setup. Plus, its compact size won't interfere with your print volume.Firmware Finesse: To unlock the full potential of this sensor, you'll need to update your printer's firmware with a version compatible with inductive leveling. While this might seem daunting, numerous online resources and tutorials walk you through the process step-by-step. Remember, it's a one-time investment for long-term leveling accuracy.Bonus Perks:Durable design withstands the wear and tear of regular printing.LED indicator provides visual confirmation of sensor activation.The wide voltage range (6V-36V) makes it compatible with most 3D printers.Overall, the DEVMO LJ12A3-4-Z/BX Inductive 4mm Normally Open Proximity Sensor is a fantastic upgrade for 3D printer users, especially those with metal build plates. Its precise detection, ease of installation, and compatibility with firmware updates make it a worthwhile investment for achieving consistent and high-quality prints.Here are some additional points to consider:Make sure your 3D printer has a compatible motherboard and firmware for inductive leveling before purchasing.Double-check the sensor size and mounting options to ensure it fits your printer setup.While installation is straightforward, basic technical knowledge might be helpful for firmware updates.If you're ready to ditch the leveling woes and embrace precise, automated bed leveling, the DEVMO LJ12A3-4-Z/BX is an excellent choice. Get ready to experience a whole new level of printing confidence and ease!
McLogan
Reviewed in the United States on December 23, 2023
This is one of those basic parts that does what it is suppose to. There is not documentation or spec sheet included but there are only three wires, power, ground an signal and they are marked on the label on the base. It has a small red LED on the base to show when it has detected ferrous metal near the end.It does come with the mounting nuts and lock-washers and the entire length is threaded to adjust for positioning.The NPN type are supposed to work with the Mach3 CNC boards and that is the intended use for this one.Recommended.
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