SKU: SENS-1270
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LJ18A3-8-Z/BX Inductive Proximity Sensor NPN NO, DC 6–36V, 8mm Range, IP54

₹389.00 (Inclusive of all taxes)
Out of Stock

The LJ18A3-8-Z/BX is an NPN normally open (NO) inductive proximity sensor designed for detecting metal objects within an 8mm range. Operating on a 6–36V DC supply, it provides a robust 300mA switching output suitable for direct interface with PLCs, relays, and industrial control systems.

Features

  • NPN Normally Open (NO) output for sinking current to ground.
  • Wide operating voltage range of 6–36V DC for flexible system integration.
  • 8mm nominal sensing distance for reliable non-contact metal detection.
  • IP54-rated housing provides protection against dust and water splashes.
  • Three-wire connection simplifies wiring to industrial controllers and relays.

Out of stock

Description

The LJ18A3-8-Z/BX operates on the principle of electromagnetic induction, where an internal oscillator creates a high-frequency field. When a metallic object enters this field, eddy currents are induced, causing a detectable change in the oscillator’s amplitude. This change triggers the solid-state NPN output switch.

Built with an IP54-rated housing, the sensor is designed for durability in industrial environments with exposure to dust and incidental water spray. Its three-wire configuration (V+, 0V, Signal) provides a straightforward interface for integration into automated machinery, safety interlocks, and position sensing systems.

Key Features

  • Inductive sensing principle for reliable ferrous and non-ferrous metal detection.
  • High-current NPN output (300mA max) capable of driving relays and PLC inputs directly.
  • Robust IP54 protection rating ensures operation in dusty or damp industrial settings.
  • Wide voltage compatibility from 6V to 36V DC for use with various power supplies and controllers.
  • Compact threaded barrel design (M18 x 1mm) for easy panel or bracket mounting.
  • LED status indicator provides visual confirmation of power and target detection.

Applications

  • Position verification of metal parts on conveyor belts or assembly lines.
  • End-of-travel or limit sensing in automated machinery and CNC equipment.
  • Safety interlock detection for machine guarding and access doors.
  • Object counting and presence detection in packaging and material handling.
  • Integration into PLC-based control systems for industrial automation.

Technical Specifications

Model NumberLJ18A3-8-Z/BX
Sensing PrincipleInductive
Output TypeNPN, Normally Open (NO)
Operating Voltage6–36V DC
Max. Output Current300mA
Nominal Sensing Distance8 mm
Hysteresis< 10% of sensing distance
Response FrequencyUp to 200 Hz
Protection RatingIP54
Housing MaterialNickel-plated Brass
Thread SizeM18 x 1 mm
Connection3-wire cable (approx. 2m)
Operating Temperature-25°C to +70°C

Frequently Asked Questions

What is the difference between NPN and PNP output on this sensor?

The LJ18A3-8-Z/BX features an NPN (sinking) output. In the active state, the signal wire switches to 0V (ground). This is commonly used with PLCs that have a common-positive input configuration. A PNP (sourcing) output would switch to the positive supply voltage instead.

What types of metal can this inductive sensor detect?

This sensor detects both ferrous (iron, steel) and non-ferrous (aluminum, copper, brass) metals. The sensing distance may vary slightly depending on the target material's conductivity and permeability, with ferrous metals typically providing the longest range.

How do I wire the three wires from this sensor?

The standard wiring is: Brown wire to DC positive (6-36V), Blue wire to DC negative (0V/ground), and Black wire to the load (e.g., PLC input or relay coil). The other side of the load connects to positive. Always refer to the specific controller's manual for correct sink/source configuration.

Can this sensor be used in wet or dusty environments?

Yes, the IP54 rating provides a degree of protection. It is dust-protected and resistant to water splashes from any direction. It is suitable for most industrial settings but is not submersible or intended for high-pressure washdown applications.

Package Includes

  • 1 x LJ18A3-8-Z/BX Inductive Proximity Sensor

Additional Information

Weight 0.08 kg