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

The WTB11-2N2461 Inductive Proximity Sensor is a robust, non-contact detection switch designed for reliable metal object sensing in industrial and automation applications. With an NPN Normally Open (NO) output configuration and a wide DC 6–36V operating voltage range, this sensor integrates seamlessly into PLCs, conveyor systems, machine tooling, and robotics setups. Its 10mm body diameter and 4mm sensing distance make it ideal for compact mounting in tight spaces where precise detection matters.

Key Features

Model: WTB11-2N2461
Output Type: NPN, Normally Open (NO)
Operating Voltage: DC 6–36V
Body Diameter: 10mm
Sensing Distance: 4mm
Detection Method: Inductive (non-contact metal detection)
Connection: 4-wire configuration for easy integration
Housing: Rugged cylindrical body for industrial-grade durability
No moving parts — long service life with minimal maintenance

Why Choose an Inductive Proximity Sensor?

Inductive proximity sensors detect metallic objects without physical contact, making them exceptionally durable and suited to harsh industrial environments. They are immune to dust, oil, and vibration that would otherwise degrade mechanical switches. Learn more about proximity sensor technology and industrial automation standards at the NIST Intelligent Systems Division.

Typical Applications

Automated assembly lines and conveyor belt systems
CNC machine tool positioning and homing
Robotics and end-of-arm tooling detection
Packaging machinery and counting systems
Automotive manufacturing equipment
General factory automation and PLC control panels

Wiring Guide (NPN NO)

Brown wire: Positive power supply (+V)
Blue wire: Negative / Ground (0V)
Black wire: Signal output (NPN NO)
White wire: Not connected (NC) or shield

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Made in Mainland China.

Frequently Asked Questions

Q: What does NPN NO mean for this inductive proximity sensor?

A: NPN stands for the transistor output type — the sensor sinks current to the load. NO (Normally Open) means the output circuit is open (off) when no metal object is detected, and closes (switches on) when a metallic target enters the 4mm sensing range. This is the most common configuration for PLC digital inputs.

Q: What metals can the WTB11-2N2461 proximity sensor detect?

A: As an inductive proximity sensor, the WTB11-2N2461 detects ferrous and non-ferrous metals, including steel, iron, aluminum, copper, and brass. Detection range may vary slightly depending on the target material — ferrous metals typically yield the full rated 4mm sensing distance.

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

A: Yes, with a simple NPN pull-up circuit or a relay module, this sensor can interface with Arduino, Raspberry Pi, and similar microcontroller platforms. Ensure your control board's input voltage matches the sensor's NPN output level, or use a relay/optocoupler module for signal isolation.

Q: What is the operating voltage range of the WTB11-2N2461?

A: This sensor operates on a wide DC 6–36V supply voltage, making it compatible with 12V and 24V industrial control systems without the need for a dedicated power regulator.

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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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