Product Overview

The Pepperl+Fuchs NJ0.8-5GM-N inductive proximity sensor delivers high-precision, non-contact position sensing for demanding industrial automation and process control environments. Engineered with a compact M5 cylindrical threaded housing, this sensor guarantees reliable operation in space-constrained applications. It integrates seamlessly with intrinsic safety barriers and TSI systems, providing stable NAMUR output signals in hazardous locations. The robust stainless steel construction resists harsh conditions, ensuring long-term operational integrity without sacrificing accuracy or durability.

Technical Configuration

Core Technology Advantages

The sensor features an advanced 2-wire NAMUR interface designed for intrinsic safety applications up to SIL 2 per IEC 61508. Its compact M5 x 0.5 thread design allows for flush installation directly into metallic machinery, minimizing interference and maximizing detection stability. The sensing face utilizes high-grade PBT material, protecting internal electronic components from vibration and mechanical shock. With an extremely high switching frequency of up to 5000 Hz, the sensor captures rapid movements with exceptional accuracy and minimal hysteresis.

Technical Specifications

Installation Guide

Installation & Wiring Guidelines

Maintain a flush mounting condition where the sensor front is level with the surrounding metal to prevent false triggering and ensure precise measurements.

Set the nominal gap voltage according to the NAMUR amplifier specifications. Ensure the current consumption is ≥ 3 mA when the target is not detected and ≤ 1 mA when the target is detected.

Observe a minimum cable bending radius of at least 10 times the cable diameter to prevent internal conductor breakage.

Route the PVC cable away from high-voltage lines and sources of heavy electromagnetic interference to maintain signal fidelity.

Engineering Advantages

Exceptional Durability and Compatibility

The stainless steel AISI 303 housing and IP67 rating provide superior corrosion and moisture resistance in extreme environments.

The sensor operates safely within hazardous areas without the need for reverse polarity protection diodes, simplifying field wiring.

It achieves complete compatibility with control systems and intrinsic safety barriers requiring NAMUR inputs, ensuring a seamless upgrade or replacement in existing safety instrumented systems.

Delivery Information

Delivery time: 3-5 days when payment is finished, shipped via DHL, FedEx, or UPS. The sensor is shipped using anti-static industrial packaging to prevent electrostatic discharge and physical damage during transit.

Technical FAQs

Q1: How can the operating state be determined via voltage and current signals?

A1: The sensor current consumption indicates the state. The current is ≥ 3 mA when the metal measuring plate is not detected, and it drops to ≤ 1 mA when the plate is detected at the nominal voltage.

Q2: Is this sensor suitable for explosive or hazardous environments?

A2: Yes, the sensor features ATEX and IECEx approvals and is rated as intrinsically safe (SIL 2), making it suitable for hazardous locations when used with an approved isolation amplifier.

Q3: Does the sensor require an external amplifier?

A3: Yes, because it uses a NAMUR output, the sensor must be connected to a dedicated NAMUR switching amplifier to process the signal correctly.

Q4: What is the maximum recommended torque during installation?

A4: Avoid overtightening the M5 thread. Use the supplied nuts and apply a moderate tightening torque to prevent cracking the internal PBT sensor face.