Pepperl+Fuchs NJ8-18GM-N M18 Proximity Sensor

USD 70.15

M18 cylindrical inductive sensor featuring 8mm non-flush detection, NAMUR NC output, stainless steel housing, and IP67 rating for intrinsically safe spaces.

SKU PEPPERL-FUCHS-NJ8-18GM-N Category
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Pepperl+Fuchs NJ8-18GM-N M18 Proximity Sensor

Model Identifier NJ8-18GM-N
Official Part Number NJ8-18GM-N
GTIN Standard NA

Technical Overview

The Pepperl+Fuchs NJ8-18GM-N is a high-performance M18 inductive proximity sensor engineered for robust industrial and hazardous area applications. It features an 8 mm non-flush sensing range and utilizes a NAMUR Normally Closed (NC) output, making it ideal for intrinsically safe circuits when paired with a compatible switching amplifier. Constructed with a rugged stainless steel 1.4305 (AISI 303) housing and a PBT sensing face, this sensor withstands harsh environments and boasts an IP67 protection rating. It operates reliably across an extended temperature range of -25 °C to 100 °C. The unit is ATEX certified and usable in safety-critical applications up to SIL 2 per IEC 61508. A pre-wired 2-meter PVC cable ensures secure and straightforward integration.

Key Features

  • 8 mm non-flush sensing distance
  • NAMUR Normally Closed (NC) output suitable for intrinsically safe systems
  • Usable up to SIL 2 according to IEC 61508
  • Durable stainless steel (AISI 303) M18 cylindrical housing
  • Extended operating temperature range of -25 °C to 100 °C
  • Pre-wired with a 2-meter PVC cable for immediate installation
  • IP67 protection against dust and water ingress

SIL 2 Certified NAMUR Output for Hazardous Areas

Technical Specification Matrix

ParameterValue
Housing SizeM18 (18 mm diameter)
Length40 mm
Sensing Distance8 mm (Non-flush)
Output TypeNAMUR, Normally Closed (NC)
Operating Voltage5 - 25 V DC
Nominal Voltage8.2 V DC
Switching Frequency0 - 200 Hz
Operating Temperature-25 °C to 100 °C
Degree of ProtectionIP67
Connection2m PVC Cable (2-wire, 0.75 mm²)
Housing MaterialStainless steel 1.4305 / AISI 303
Sensing Face MaterialPBT
Safety Integrity LevelSIL 2 (IEC 61508)

Industrial Applications

1. Valve Position Feedback in Chemical Plants

Detecting the open/close state of rotary and linear valves within explosive gas or dust environments using an intrinsically safe NAMUR signal.

Problem Solved

Eliminates spark risks in hazardous ATEX 1G/Zone 0 areas while maintaining consistent detection up to 100 °C.

NAMUR outputATEX 1GIntrinsically SafeValve PositionSIL 2

2. Conveyor Belt Speed Monitoring

Counting metal gear teeth or rotating targets on drive shafts to accurately monitor conveyor velocity in heavy-duty industrial setups.

Problem Solved

Enables precise pulse generation up to 200 Hz while resisting harsh dirt and moisture ingress via IP67-rated stainless steel encapsulation.

Speed Monitoring200 Hz FrequencyIP67Stainless SteelM18 Sensor

3. Crane Boom Extension Limit Detection

Sensing metal structural limits on outdoor cranes to prevent mechanical overtravel and potential structural damage during operation.

Problem Solved

Ensures reliable operation despite drastic outdoor temperature fluctuations (-25 °C to +100 °C) without risking mechanical wear.

Non-flush detectionExtreme TemperatureLimit Detection8mm sensing range
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