INDUCTIVE SENSOR NJ10-30GK-SN-15M PEPPERL+FUCHS

Pepperl+Fuchs NJ10-30GK-SN-15M Inductive Proximity Sensor

This high-reliability solid-state sensor belongs to the Pepperl+Fuchs safety-directed NAMUR code segment (SN Series). It is engineered for non-contact target detection of metallic objects within automated factory processes, machine guard networks, and explosive hazardous areas. Equipped with an extra-long 15-meter fixed connection cable, this model provides clean positioning flexibility across expansive structural frameworks.

Key Features

• Advanced Safety NAMUR (SN) Functionality: Configured with a specialized dual-channel fail-safe micro-circuit design. When paired with an approved control interface or safety barrier, it provides reliable structural fault-detection loop monitoring up to SIL 3 standard requirements.

• Threaded Plastic Cylindrical Housing: Molded inside a thick, durable PBT (polybutylene terephthalate) chemical-resistant polymer body with standard M30 x 1.5 alignment threads. This plastic housing protects internal coils from corrosive process liquids, salt air, and cutting oil splashes.

• Extra-Long 15-Meter Integrated Cable: Built with a direct, molded-in 15-meter PVC-jacketed control cable. This eliminates intermediate junction points, reducing signal attenuation and saving installation labor across large industrial machines.

• Non-Flush Embedding Capability: Designed for non-flush mounting installation layouts. This positioning profile maximizes its magnetic flux fields to provide an extended 10 mm nominal sensing range, mitigating potential impact damage from straying machine components.

• Hazardous Area Classification: Certified for intrinsic safety applications. This makes it an ideal fit for ATEX/IECEx Zones 0, 1, and 2 where flammable gases, vapors, or combustible dust mixtures are continuously present.

Technical Specifications

Splicing Configuration Architecture

The internal core operation of the sensor relies on basic electromagnetic induction:

1. Oscillator Generation: The sensor tip houses an internal high-frequency LC oscillator circuit that emits a directional radio-frequency electromagnetic field from its front face.

2. Eddy Current Loss: When a metallic object enters this field zone, eddy currents are induced on the metal surface, which dampens the amplitude of the internal oscillator.

3. Signal Conversion: An internal trigger circuit converts this change into a distinct shift in current consumption (less than 1 mA when a target is detected versus greater than 3 mA when clear), routing the state through the 15-meter cable to the control rack.

Applications

• Hazardous Area Valve Position Feedback: Installed on chemical blending lines, oil refineries, and gas custody manifolds to monitor open/closed valve positions safely.

• Heavy Machinery Speed and Rotation Sensing: Placed next to large gear teeth or rotating pump shafts to track shaft speed and detect over-speed or under-speed faults.

• Automated Assembly Line Tracking: Works inside conveyor sorting lines and automated bottling stations to confirm tool carrier positioning and pallet staging.

• Safety Gate and Guard Interlocking: Integrated into machine guard doors and perimeter fences to halt hazardous automated equipment instantly if a worker opens a safety panel.