The Pepperl+Fuchs NBB4-12GM50-E3 is a high-precision inductive proximity sensor engineered for reliable non-contact metal detection in industrial systems. With a rated detection distance of 4 mm and flush mounting capability, it ensures accurate object sensing even in tight spaces, ideal for applications requiring precise positioning. Operating on a wide DC voltage range (5–36 V), the 3-wire PNP output (normally closed, NC) enables seamless integration with PLCs and control systems, while a high switching frequency of up to 2550 Hz supports rapid response in high-speed automation processes. A yellow multi-hole LED indicates the switching state for easy diagnostics, and its compact cylindrical design (M12 thread, 12 mm diameter, 64.5 mm length) facilitates installation in space-constrained mechanical setups.
Built to withstand extreme industrial conditions, this sensor features a robust brass housing with a white bronze coating and a PBT sensing face, offering protection ratings up to IP68 (dustproof and waterproof for temporary immersion). It operates reliably across a wide temperature range of -40°C to 85°C, making it suitable for harsh environments such as chemical plants, food processing lines, or outdoor machinery exposed to thermal fluctuations and vibrations. Safety features include reverse polarity, pulsing short-circuit, and overvoltage protection (voltage drop ≤1 V), minimizing downtime and enhancing long-term reliability. The M12 x 1 connector ensures secure wiring, while the embeddable design eliminates interference from adjacent metals for consistent detection performance.
The NBB4-12GM50-E3 excels in versatile automation scenarios, from conveyor belt monitoring and robotic arm guidance to material handling and quality control in automotive and electronics industries. Its defined reduction factors for metallic targets (Al: 0.4, Cu: 0.35, 304 SS: 0.79) ensure accurate detection across different materials, while compliance with international standards (EN IEC 60947-5-2, UL, CCC) and marine certification (DNVGL) broadens its applicability in global industrial setups. Weighing just 29 g and equipped with a tightening torque of 0–10 Nm for secure mounting, the sensor combines lightweight design with heavy-duty performance. Trusted for its high repeatability (±2% of rated distance) and low hysteresis (5%), it delivers consistent results in both static and dynamic industrial environments, optimizing process efficiency and control.
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Attribute
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Description
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Product Name
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Inductive Proximity Sensor NBB4 - 12GM50 - E3
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Manufacturer
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Pepperl + Fuchs
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Detection Principle
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Inductive
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Rated Detection Distance
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4 mm (flush mounting)
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Supply Voltage
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5 - 36 V DC
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Output Type
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3 - wire PNP, Normally Closed (NC)
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Switching Frequency
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≤ 2550 Hz
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Connection
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M12 x 1, 4 - pin connector
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Housing Material
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Brass with white bronze coating, PBT sensing face
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Protection Class
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IP68
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Ambient Temperature Range
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- 40 °C to + 85 °C
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Response Time
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≤ 1 ms
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Hysteresis
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≤ 5% of the rated operating distance
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Repeatability
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≤ ± 2% of the rated operating distance
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LED Indication
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Yellow multi - hole LED for switching state
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Reduction Factor
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Aluminum: 0.4; Copper: 0.35; Stainless steel 304: 0.79
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Certifications
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UL, CE, cULus, CCC, DNVGL
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Weight
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29 g
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Tightening Torque
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0 - 10 Nm
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Compliance Standards
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EN IEC 60947 - 5 - 2
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Reverse Polarity Protection
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Yes
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Short - Circuit Protection
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Yes (pulsing)
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Overvoltage Protection
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Yes (voltage drop ≤ 1 V)
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