Precise Inductive Sensing for Industrial Metal Detection

The Pepperl+Fuchs NBB20-U1-E0 is a high-precision inductive proximity sensor engineered for reliable non-contact detection of metal objects in industrial automation. With a 20 mm rated operating distance (flush mounting), it ensures accurate positioning even in compact or vibration-prone setups, supported by a bidirectional, rotatable sensor head for flexible alignment. The 3-wire DC NPN output (normally open) operates across a wide voltage range (10–30 V DC), integrating seamlessly with PLCs and control systems. Key electrical features include a 440 Hz switching frequency, 5% hysteresis to minimize signal fluctuations, and robust protections against reverse polarity and pulsing short circuits. A 360° visible LED system—green for power and yellow for switching state—enables quick diagnostics, making it ideal for high-speed applications like conveyor control, machinery positioning, and part counting.

Rugged Construction for Harsh Environmental Resilience

Built to endure demanding industrial conditions, the NBB20-U1-E0 features a durable PA/metal housing with an epoxy powder coating, resisting corrosion, impact, and chemical exposure. Its IP68/IP69K protection rating ensures full waterproof and dustproof performance, capable of withstanding high-pressure jet cleaning and prolonged submersion. The sensor maintains stable operation across a -25°C to +85°C ambient temperature range and stores safely at -40°C to +85°C, adapting to extreme heat or cold environments. Mechanical design highlights include screw terminal connections (supporting up to 2.5 mm² conductors with 1.2 Nm torque) and a compact 40 x 40 x 118 mm form factor, weighing 225 g for easy installation in space-constrained machinery.

Compliant Performance and Versatile System Integration

Designed for global industrial use, the NBB20-U1-E0 complies with EN IEC 60947-5-2 safety standards and carries certifications like UL listing and RoHS compliance, with CCC exemption for ≤36 V DC applications. Its metal reduction factors (aluminum: 0.33, copper: 0.31, stainless steel 304: 0.74) enable adaptable detection across different materials, enhancing versatility in automotive manufacturing, logistics, and process control. Functional safety parameters include an MTTFd of 1510 years and a 20-year mission time, ensuring long-term reliability in non-safety-integrated systems. Backed by 3D CAD models and EPLAN data, this sensor simplifies integration into complex automation setups, delivering precision, durability, and ease of use for critical industrial tasks.

​Xiamen Zhicheng Automation Technology Co., Ltd

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