WTB11-2N2461 Inductive Proximity Switch – NPN NO, DC 6–36V

The WTB11-2N2461 Inductive Proximity Sensor is a high-performance, non-contact detection switch designed for reliable object detection in industrial and automation environments. With a wide operating voltage range of 6–36V DC, a 10mm body diameter, and a 4mm sensing distance, this NPN Normally Open (NO) sensor delivers fast, accurate switching for metal target detection without physical contact.

Built for durability in demanding conditions, this inductive proximity switch is ideal for use in manufacturing automation, conveyor systems, machine tooling, robotics, and general-purpose sensing applications. Its compact cylindrical housing makes it easy to mount in tight spaces, while its robust construction ensures long service life even in challenging industrial environments.

Made in Mainland China.

Key Features

Model: WTB11-2N2461
Output Type: NPN, Normally Open (NO)
Operating Voltage: DC 6–36V (wide range)
Body Diameter: 10mm (compact cylindrical form)
Sensing Distance: 4mm
Detection Method: Inductive (non-contact metal detection)
No High-Concern Chemicals — safe for standard industrial use
Fast response time for high-speed applications
Stable, interference-resistant operation
Easy 3-wire wiring for straightforward integration

Typical Applications

Industrial automation & conveyor systems
CNC machine tooling & robotics
Position & speed detection
Counting & sorting systems
General-purpose proximity sensing

Wiring Guide

Brown wire: Positive supply (+V)
Blue wire: Negative supply (0V / GND)
Black wire: Signal output (NPN NO)

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For more information on industrial sensor standards and safe wiring practices, visit OSHA – Control of Hazardous Energy.

Learn more: Proximity sensor

Frequently Asked Questions

Q: What does NPN Normally Open (NO) mean for this proximity sensor?

A: NPN Normally Open (NO) means the output signal wire is at an open (HIGH-impedance / disconnected) state when no metal target is detected. When a metal object enters the 4mm sensing range, the output switches LOW (pulls to GND), completing the circuit. This is a standard NPN configuration compatible with most PLCs and microcontrollers.

Q: What materials can the WTB11-2N2461 inductive sensor detect?

A: As an inductive proximity sensor, the WTB11-2N2461 is designed to detect ferrous and non-ferrous metals, including steel, iron, aluminum, copper, and brass. The rated 4mm sensing distance applies to standard mild steel targets; non-ferrous metals may have a slightly reduced effective sensing range.

Q: Is this sensor compatible with Arduino, Raspberry Pi, or PLCs?

A: Yes. The NPN output is widely compatible with PLCs, Arduino (with a suitable voltage divider or level shifter if using 5V logic), and other industrial controllers. Ensure your control system's input accepts NPN (current-sinking) signals and that the supply voltage falls within the 6–36V DC operating range.

Q: What is the IP rating or environmental protection of this sensor?

A: While a specific IP rating is not listed in the product data, inductive proximity sensors of this type are generally housed in a rugged metal barrel suitable for typical industrial environments. For use in wet or high-dust environments, please verify the datasheet specifications or contact us for additional details.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

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