Pepperl+Fuchs M12 Inductive Proximity Sensor (NBB4-12GM50-E2-V1-M1)

The Pepperl+Fuchs NBB4-12GM50-E2-V1-M1 is a high-performance, industrial-grade inductive proximity sensor engineered for non-contact metallic target detection in demanding automation environments. Part of Pepperl+Fuchs’ specialized automotive and mobile equipment line, this sensor features a 4 mm flush-mountable sensing distance housed inside a rugged, brass nickel-plated M12 cylindrical threaded barrel. Optimized with E1 type-approval for mobile hydraulics and automotive manufacturing, it offers exceptional resistance to severe electromagnetic interference (EMI), mechanical vibration, and thermal stress.

Key Features

Extended Sensing Range (4 mm Flush): Offers an increased sensing envelope compared to standard M12 sensors, allowing the switch to be mounted further back from moving machinery to prevent physical impact damage.
Mobile Electronic E1 Type-Approval: Certified with E1 regulatory approval, making it highly immune to extreme electrical transients, ground shifts, and electromagnetic noise common in vehicular and outdoor heavy-machinery systems.
Rugged Cylindrical Housing: Built with a durable, nickel-plated brass body and a high-strength PBT sensing face designed to withstand industrial cutting oils, moisture, and abrasive debris.
Quick-Disconnect M12 Plug: Outfitted with a standard 4-pin M12 x 1 quick-disconnect connector (V1 layout) on the rear housing, drastically reducing wiring mistakes and enabling rapid swap-outs during routine maintenance.
Integrated Circuit Protection: Equipped with built-in short-circuit (pulsing type) and reverse polarity safety loops to eliminate the risk of sensor failure during accidental commissioning errors.

Technical Specifications

Feature	Specification
Model / Part Number	NBB4-12GM50-E2-V1-M1
Brand	Pepperl+Fuchs
Product Type	Inductive Proximity Sensor / Position Switch
Rated Operating Distance ( $s_n$ )	4 mm (Flush/Shielded installation)
Output Switching Type	PNP, Normally Open (NO), 3-wire
Operating Voltage ( $U_B$ )	10 V to 30 V DC
Switching Frequency ( $f$ )	0 to 2500 Hz (High-speed pulse capacity)
Thread Body Size	M12 × 1 (Total barrel length: 50 mm)
Connection Profile	M12 × 1 plug connector, 4-pin (V1 connector style)
Ingress Protection Rating	IP68 / IP69K (High-pressure washdown protected)
Certifications	cULus Listed, E1 Type Approved, CE Marked

Applications

Automotive Assembly Lines: Tracking carrier position, sheet-metal placement, and robot arm indexing loops along active conveyor routes.
Mobile Hydraulics & Agriculture Equipment: Detecting cylinder stroke limits and accessory positions on cranes, tractors, and mining machinery exposed to extreme weather.
Machine Tool Prototyping: Serving as a high-speed rotational speed (RPM) sensor or safety interlock boundary on CNC milling spindles and lathe guards.
Packaging and Material Handling: Counting metallic cans, sorting metal-capped containers, or verifying component orientation on packaging lines.