Pepperl+Fuchs NJ5-18GK-N-5M Inductive NAMUR Sensor

USD 76.32

M18 flush inductive NAMUR sensor with 5mm sensing, 8.2V Uo, IP68, -25 to 100°C, SIL 2 capable, 5m PVC cable for hazardous and demanding environments.

SKU PEPPERL-FUCHS-NJ5-18GK-N-5M Category
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Pepperl+Fuchs NJ5-18GK-N-5M Inductive NAMUR Sensor

Model Identifier NJ5-18GK-N-5M
Official Part Number NJ5-18GK-N-5M
GTIN Standard NA

Technical Overview

M18 flush inductive NAMUR sensor with 5mm sensing, 8.2V Uo, IP68, -25 to 100°C, SIL 2 capable, 5m PVC cable for hazardous and demanding environments.

Key Features

  • Comfort series design
  • 5 mm flush installation
  • Usable up to SIL 2 according to IEC 61508
  • NAMUR output for intrinsically safe circuits
  • 5 meter PVC connection cable
  • Housing material: PBT/PPS; Sensing face: PBT
  • High degree of protection: IP66 / IP68
  • Wide ambient temperature range: -25 to 100 °C (-13 to 212 °F)

NAMUR output ensures intrinsic safety when connected to an approved barrier, making it suitable for hazardous area applications and achieving SIL 2 safety integrity.

Technical Specification Matrix

ParameterValue
Switching element functionNAMUR, NC (Normally Closed)
Rated operating distance (sn)5 mm
InstallationFlush
Output polarityNAMUR
Nominal voltage (Uo)8.2 V (Ri approx. 1 kΩ)
Switching frequency (f)0 ... 500 Hz
Current consumption (Measuring plate not detected)≥ 3 mA
Current consumption (Measuring plate detected)≤ 1 mA
Ambient temperature-25 ... 100 °C (-13 ... 212 °F)
Connection typeCable PVC, 5 m
Core cross-section0.75 mm²
Housing materialPBT/PPS
Sensing facePBT
Degree of protectionIP66 / IP68
Safety Integrity Level (SIL)SIL 2 acc. to IEC 61508
Housing dimensionsM18 x 1 threaded cylindrical body
Physical Weight (kg)0.07
Dimensions L x W x H (cm)6.3 x 1.8 x 1.8

Industrial Applications

1. Position Sensing in Chemical Processing Plants (Hazardous Areas)

This sensor is ideally suited for reliably detecting the open/closed position of valves or the presence of metallic components on conveyor belts within potentially explosive atmospheres.

Problem Solved

The NAMUR output ensures intrinsic safety when connected to an approved barrier, preventing ignition in hazardous environments (e.g., Zone 1, 2, 21, 22). The IP66/IP68 rating guarantees protection against dust and water ingress, crucial in harsh chemical environments. The wide operating temperature range (-25 to 100 °C) allows for reliable operation in varying plant conditions.

Intrinsic SafetyNAMURHazardous LocationIP68Position DetectionATEXSIL 2

2. Object Detection on High-Temperature Conveyor Systems

Used for reliable, non-contact detection of metal objects passing on conveyor belts, particularly in industries like steel manufacturing, foundries, or baking ovens where ambient temperatures can be elevated.

Problem Solved

The operating temperature range up to 100 °C is well-suited for environments with high heat. Its 5 mm flush sensing distance allows for precise detection of metallic targets without physical contact, minimizing wear and tear. The robust PBT/PPS housing and IP68 rating ensure durability against dust and heat.

High TemperatureNon-Contact SensingObject DetectionConveyor SystemIP68Flush Installation

3. End-of-Travel Sensing for Industrial Machinery (Safety-Critical)

This sensor can be integrated into industrial machinery, such as automated guided vehicles (AGVs), CNC machines, or presses, to precisely detect the end-of-travel limits for moving parts, contributing to safety functions.

Problem Solved

The 5 mm flush detection and NAMUR output, along with its SIL 2 capability (when integrated with appropriate safety-related systems), make it suitable for safety-critical applications. It provides a reliable signal for machine control, preventing overtravel and ensuring operational safety by meeting IEC 61508 standards.

End-of-TravelLimit SwitchSafety FunctionSIL 2Machine AutomationNon-ContactPrecision Sensing
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