Pepperl+Fuchs NJ5-18GK-N Inductive Proximity Sensor

USD 67.00

M18 cylindrical NAMUR inductive proximity sensor with 5mm flush sensing, IP66/IP68 protection, -25-100°C ambient temp, and ATEX/IECEx approvals.

SKU PEPPERL-FUCHS-NJ5-18GK-N Category
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Pepperl+Fuchs NJ5-18GK-N Inductive Proximity Sensor

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

Technical Overview

M18 cylindrical NAMUR inductive proximity sensor with 5mm flush sensing, IP66/IP68 protection, -25-100°C ambient temp, and ATEX/IECEx approvals.

Key Features

  • 5 mm rated operating distance for flush installation.
  • NAMUR output, Normally Closed (NC) switching function.
  • Usable up to SIL 2 according to IEC 61508.
  • Wide ambient temperature range of -25 °C to 100 °C.
  • High degree of protection: IP66 / IP68 for harsh environments.
  • Robust M18 cylindrical housing made of PBT/PPS.
  • Approvals for hazardous areas including ATEX, IECEx, FM, UL, CSA.
  • 2-wire connection type with a 2 m PVC cable.
  • Switching frequency of 0 to 500 Hz.

NAMUR output for intrinsic safety in hazardous environments, compatible with approved switch amplifiers.

Technical Specification Matrix

ParameterValue
Switching functionNormally closed (NC)
Output typeNAMUR, 2-wire
Rated operating distance (sn)5 mm
InstallationFlush / Embeddable
Assured operating distance (sa)0 ... 4.05 mm
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, 2 m
Core cross-section0.75 mm²
Housing materialPBT/PPS
Sensing face materialPBT
Degree of protectionIP66 / IP68
Safety Integrity Level (SIL)SIL 2 acc. to IEC 61508
Physical Weight (kg)0.13
Dimensions L x W x H (cm)4.4 x 1.8 x 1.8

Industrial Applications

1. Position Detection in Hazardous Areas

This sensor is ideal for precise, non-contact position detection of metal parts within explosive atmospheres, such as chemical processing plants, oil and gas facilities, or paint spraying booths.

Problem Solved

The NAMUR output and ATEX/IECEx intrinsic safety certifications (e.g., II 2G Ex ia IIC T6 Gb, II 1D Ex ia IIIC T135°C Da) ensure that the sensor operates safely without creating ignition sources, reliably detecting machine part positions in explosive environments. The 5mm flush installation prevents mechanical damage and interference.

Intrinsic safetyNAMURATEXIECExhazardous locationsposition sensingchemical processing

2. High-Temperature Industrial Process Monitoring

Suitable for object detection in industrial environments where elevated ambient temperatures are present, such as near ovens, furnaces, or hot machinery in manufacturing and material processing.

Problem Solved

With an extended operating temperature range of -25 °C to 100 °C, this sensor maintains reliable operation in challenging thermal conditions where standard sensors would typically fail, preventing downtime and ensuring continuous process monitoring.

High temperatureindustrial automationprocess controlobject detectionthermal stability100 °C

3. Robust Object Detection in Wet and Dusty Environments

This sensor is well-suited for reliable presence detection in harsh environments prone to water spray, dust, and particulate matter, such as automotive washing stations, food processing lines, or outdoor heavy machinery.

Problem Solved

Its IP66/IP68 degree of protection ensures the sensor remains fully operational and protected against the ingress of dust and powerful water jets, or even temporary submersion, significantly reducing maintenance and increasing system uptime in demanding conditions.

IP66IP68harsh environmentdust protectionwater immersionmaterial handlingfood processing
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