LJC18A3-B-Z/BX Capacitive Proximity Sensor – NPN NO 6–36V DC, 18mm Non-Contact Detection Sensor
LJC18A3-B-Z/BX Capacitive Proximity Sensor – NPN NO 6–36V DC, 18mm Non-Contact Detection Sensor
Description
The LJC18A3-B-Z/BX Capacitive Proximity Sensor is an NPN normally open (NO) non-contact detection sensor designed to detect both metallic and non-metallic materials without physical contact.
Unlike inductive proximity sensors, a capacitive sensor can detect a wider range of materials such as plastic, glass, wood, paper, powder, liquid, grain, metal and other objects, depending on the application and sensor adjustment.
This sensor is commonly used in industrial automation, object detection, liquid level sensing, material detection, conveyor systems, counting applications, packaging machines, DIY automation projects and PLC-based control systems.
The cylindrical M18 threaded body allows easy mounting on machines, brackets and automation panels. It operates from a 6V to 36V DC supply and provides an NPN transistor output, making it suitable for compatible controllers, PLC inputs, relay interfaces and microcontroller projects when proper interface circuitry is used.
Many LJC18A3-B-Z/BX sensors include an adjustable sensitivity control, allowing the user to tune the sensing distance according to the target material and installation conditions.
Key Features
- Capacitive proximity sensing
- Detects metallic and non-metallic objects
- NPN normally open output
- Non-contact operation
- M18 cylindrical threaded body
- Wide 6–36V DC operating range
- Adjustable sensing sensitivity on common versions
- LED detection/status indication
- Suitable for liquids, plastics, glass, wood and metal
- Useful for industrial and DIY automation
- Easy panel and bracket mounting
Specifications
| Specification | Details |
|---|---|
| Product Type | Capacitive Proximity Sensor |
| Model | LJC18A3-B-Z/BX |
| Sensor Type | Capacitive |
| Output Type | NPN |
| Output State | Normally Open (NO) |
| Supply Voltage | 6–36V DC |
| Body Diameter | Approx. 18mm / M18 |
| Detection Method | Non-Contact |
| Typical Sensing Distance | Up to approx. 10mm, depending on target and adjustment |
| Sensitivity Adjustment | Supported on common variants |
| Indicator | LED Status Indicator |
| Connection Type | 3-Wire |
| Typical Brown Wire | V+ |
| Typical Blue Wire | GND / 0V |
| Typical Black Wire | Output |
| Target Materials | Metal, plastic, glass, wood, liquid, powder and similar materials |
| Mounting | Threaded Cylindrical |
| Application | Automation, level detection, object sensing, conveyor systems |
| Quantity | 1 Piece |
Important: Wiring colours, sensing distance and exact electrical specifications can vary between manufacturers. Verify the label/datasheet supplied with the sensor before wiring. An NPN sensor output should be connected only to a compatible input or suitable interface circuit.