Pepperl+Fuchs NJ1,5-8GM-N – Inductive Proximity Sensor | NAMUR / NPN Series
Engineering Background
The NJ1,5-8GM-N is part of Pepperl+Fuchs’ globally trusted NJ Series of inductive proximity sensors — a platform engineered for precision detection in demanding industrial environments. Pepperl+Fuchs pioneered inductive sensor technology and continues to set the benchmark for reliability in factory automation, process control, and machine safety applications worldwide.
Product Positioning
Designed for procurement engineers and system integrators who require a compact, flush-mountable M8 inductive sensor with NPN normally-open output, the NJ1,5-8GM-N delivers consistent 1.5mm sensing performance in a robust M8 threaded barrel housing. It is the go-to choice for tight-space installations on conveyor systems, robotic end-effectors, and precision assembly lines.
Complete Technical Specifications
- Part Number / SKU: NJ1,5-8GM-N
- Manufacturer: Pepperl+Fuchs (P+F)
- Series / Platform: NJ Series – Standard Inductive Sensors
- Housing Form Factor: M8 Cylindrical, Threaded Barrel
- Mounting Type: Flush (Embeddable)
- Sensing Range (Sn): 1.5 mm (nominal)
- Output Type: NPN, Normally Open (NO)
- Supply Voltage (Ub): 10 – 30 VDC
- Output Current (max): 200 mA
- Switching Frequency: ≤ 1,500 Hz
- Voltage Drop (Ud): ≤ 2.5 V
- No-load Current (I₀): ≤ 10 mA
- Protection Class: IP67 (IEC 60529)
- Operating Temperature: -25°C to +70°C
- Connection Type: 3-wire, PVC cable (standard)
- Housing Material: Nickel-plated brass
- LED Indicator: Yellow (switching status)
- Standards Compliance: CE, UL, RoHS
- Country of Origin: Germany
Proven Application Environments
- Conveyor belt position detection and part counting
- Robotic arm end-of-travel and home position sensing
- CNC machine tool change and spindle position verification
- Automotive body-in-white assembly line part presence detection
- Packaging machinery film registration and indexing
- Semiconductor wafer handling and substrate detection
- Food & beverage stainless-steel compatible installations (flush mount)
Engineering Advantages
- Flush Mountable: Eliminates dead-zone interference; installs directly into metal brackets without protruding active face.
- IP67 Sealed: Withstands wash-down, coolant spray, and dusty environments without additional enclosure.
- Wide Supply Range (10–30 VDC): Compatible with both 12V and 24V PLC I/O cards without additional conditioning.
- NPN Open-Collector Output: Direct interface to Siemens, Mitsubishi, Omron, Allen-Bradley, and Beckhoff digital input modules.
- Compact M8 Form Factor: Ideal for space-constrained fixtures and multi-sensor arrays.
- EMC Hardened: Designed to operate in high-frequency drive and welding environments.
System Architecture & Signal Flow
The NJ1,5-8GM-N operates on a standard 3-wire NPN topology:
- Brown (Pin 1): +VDC Supply (10–30V)
- Blue (Pin 3): 0V / GND
- Black (Pin 4): NPN Output → PLC Digital Input (sinks current when target detected)
When a ferrous metal target enters the 1.5mm sensing field, the oscillator damping triggers the output transistor to conduct (sink), pulling the PLC input low — confirming target presence. The yellow LED illuminates simultaneously for visual confirmation.
Sourcing & Quality Verification
- OEM Authenticity: All units sourced through verified Pepperl+Fuchs authorized distribution channels.
- Batch Traceability: Each unit carries manufacturer date code and lot number for full supply chain traceability.
- Pre-shipment Inspection: Functional switching test and dimensional verification performed before dispatch.
- Packaging: Original Pepperl+Fuchs retail packaging with datasheet and CE declaration of conformity.
- Warranty: 12-month warranty against manufacturing defects.
Procurement Process
- Lead Time: In-stock items ship within 1–3 business days; contact us for bulk order scheduling.
- MOQ: 1 piece (no minimum order quantity for standard stock).
- Bulk Pricing: Volume discounts available for orders of 10+ units — request a formal quotation.
- Export Compliance: HS Code 8536.90 | EAR99 — no export license required for most destinations.
- Payment Terms: T/T, PayPal, credit card; Net-30 available for approved corporate accounts.
- Documentation: Commercial invoice, packing list, COO certificate, and test report available on request.
Technical FAQ
- Q: Can this sensor detect non-ferrous metals like aluminum or copper?
- A: The NJ1,5-8GM-N is optimized for ferrous metals (iron, steel). Detection of non-ferrous metals is possible but with a significantly reduced sensing range (correction factor applies). For non-ferrous applications, consider the NJ Series with extended-range variants.
- Q: Is this sensor compatible with a 5V PLC input card?
- A: No. The minimum supply voltage is 10 VDC. For 5V systems, a signal conditioning relay or level-shifter is required.
- Q: What is the difference between NJ1,5-8GM-N and NJ1,5-8GM-N-V1?
- A: The -V1 suffix denotes a variant with a different cable length or connector configuration. Core electrical specifications remain identical. Confirm your connector requirement before ordering.
- Q: Can I mount this sensor in a stainless-steel bracket?
- A: Yes. Flush mounting in non-ferrous brackets (aluminum, stainless steel, brass) is recommended to avoid detuning the sensing field. Avoid embedding in ferrous steel brackets.
- Q: What PLC brands is this sensor directly compatible with?
- A: Siemens S7-1200/1500, Mitsubishi FX/Q/iQ-R, Omron CJ/NX, Allen-Bradley CompactLogix/MicroLogix, Beckhoff EL1xxx — any 24VDC NPN-compatible digital input module.
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