electrical center b2c

LJ4/LJ5/LJ6 Mini Inductive Proximity Sensor 1mm NPN/PNP NO/NC

Name: LJ4/LJ5/LJ6 Mini Inductive Proximity Sensor 1mm NPN/PNP NO/NC
Brand: electrical center b2c
SKU: LJ4A3-1-Z/BX (NPN 3-Wire NO) Flush mount type m4 promixity switch sensing distance 1mm
Price: 19.1 USD
Availability: InStock

$19.10 USD

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HURON M4/M5/M6 micro inductive proximity switch with 1mm sensing range. 3-wire NPN/PNP NO/NC options, 6-36V DC, LED indicator, short-circuit protection, nickel-plated brass housing, ideal for compact industrial automation and small equipment.

1. Key Selling Points

✅ Ultra-Compact Design

Available in M4, M5, and M6 thread sizes, perfect for applications with limited installation space.
1mm ultra-short sensing range, ideal for precision metal detection.

✅ Reliable Performance

Built-in short-circuit protection and reverse polarity protection to prevent damage from wiring errors or overloads.
Fast response time ≤ 2ms, suitable for high-speed automation.
Nickel-plated brass housing provides durability, waterproof, and oil-proof performance.

✅ Flexible Output Options

3-wire NPN/PNP configurations with both Normally Open (NO) and Normally Closed (NC) variants available.
Built-in LED indicator light for clear status monitoring.

Specification

Attribute	Details
Brand	HURON
Series	LJ4A3 / LJ5A3 / LJ6A3
Product Type	Miniature Inductive Proximity Sensor
Thread Size	M4 / M5 / M6
Mounting Style	Flush (Embedded)
Sensing Distance	1mm ±10%
Operating Voltage	DC 6~36V
Rated Load Current	≤ 100mA (typical for miniature models)
Response Time	≤ 2ms
Housing Material	Nickel-plated brass
Sensing Head Material	ABS Plastic
Cable Length	1.2m (customizable)
Protection Features	Short-circuit protection, reverse polarity protection, waterproof, oil-proof, anti-interference
LED Indicator	Yes (ON for NO when detecting, OFF for NC when detecting)
Output Configurations	3-wire NPN NO/NC, 3-wire PNP NO/NC
Operating Temperature	-25℃ ~ +65℃
Applications	Compact automation equipment, small machinery, precision positioning, metal detection in limited-space environments

5.Model Variants

M4 Series (LJ4A3-1)

Model	Output Type	Operation
LJ4A3-1-Z/BX	NPN	NO (Normally Open)
LJ4A3-1-Z/AX	NPN	NC (Normally Closed)
LJ4A3-1-Z/BY	PNP	NO (Normally Open)
LJ4A3-1-Z/AY	PNP	NC (Normally Closed)
LJ4A3-1-Z/BX (with thread)	NPN	NO (Normally Open)
LJ4A3-1-Z/BY (with thread)	PNP	NO (Normally Open)

M5 Series (LJ5A3-1)

Model	Output Type	Operation
LJ5A3-1-Z/BX	NPN	NO (Normally Open)
LJ5A3-1-Z/AX	NPN	NC (Normally Closed)
LJ5A3-1-Z/BY	PNP	NO (Normally Open)
LJ5A3-1-Z/AY	PNP	NC (Normally Closed)

M6 Series (LJ6A3-1)

Model	Output Type	Operation
LJ6A3-1-Z/BX	NPN	NO (Normally Open)
LJ6A3-1-Z/AX	NPN	NC (Normally Closed)
LJ6A3-1-Z/BY	PNP	NO (Normally Open)
LJ6A3-1-Z/AY	PNP	NC (Normally Closed)

NPN vs PNP Concept Explanation (Inductive Proximity Switches)

NPN vs PNP Concept Explanation

(For Inductive Proximity Switches)

NPN: Common positive voltage, outputs negative voltage (low-level signal).

PNP: Common negative voltage, outputs positive voltage (high-level signal).
NPN NO (Normally Open): Normally open state when idle. When an object is detected, the black wire outputs a negative voltage signal.
NPN NC (Normally Closed): The black wire outputs a voltage signal in the normal state. When an object is detected, the output signal is disconnected.
PNP NO (Normally Open): Normally open state when idle. When an object is detected, the black wire outputs a positive voltage signal.
PNP NC (Normally Closed): The black wire outputs a positive voltage signal in the normal state. When an object is detected, the output signal is disconnected.

Quick Summary

Type	Wiring Common	Output Signal	NO Behavior	NC Behavior
NPN	V+ (Positive)	Low / Negative	Idle: Open, no signal Detected: Outputs negative	Idle: Closed, outputs signal Detected: Stops output
PNP	0V / GND (Negative)	High / Positive	Idle: Open, no signal Detected: Outputs positive	Idle: Closed, outputs signal Detected: Stops output