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Pepperl+Fuchs Blog

Metal Detection Using Inductive Sensors

Posted by Edwin Stoll on Thu, Sep 27, 2018

Inductive sensors are a type of proximity sensor that use an electromagnetic field to detect metal. The oscillating electromagnetic field generated by the inductive sensor drives eddy currents through a metal target. The eddy currents in the metal target generate an opposing electromagnetic field that resists the field being generated by the sensor. This causes a power drop in the sensor, indicating the nearby metal, and an output signal is given.

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Topics: Inductive Sensors, proximity sensors

Don't Treat a NAMUR Sensor like a Standard Sensor

Posted by Sam Horn on Mon, May 21, 2018

On quick visual inspection, a 2-wire NAMUR sensor looks the same as a standard 2-wire DC sensor. But do not confuse the wiring connections between these two types of sensors. On the inside, NAMUR sensors have different circuitry than standard 2-wire DC sensors and need special treatment.

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Topics: Inductive Sensors

IO-Link for Industrial Sensors: Be Proactive, Not Reactive

Posted by Mitch Phillians on Thu, Feb 08, 2018

Are unexpected issues often determining your schedule? Have you recently had to push back a project because of recurring problems? Having to respond to unplanned issues may seem like an inevitable cost of doing business, but it is becoming harder and harder to settle for a reactive approach to plant management and remain competitive at the same time.

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Topics: Inductive Sensors, Photoelectric Sensors, Ultrasonic Sensors, Software

Does My Application Require a NAMUR Output Sensor?

Posted by Andrew Hund on Fri, Aug 25, 2017

NAMUR sensors solve the same applications that standard inductive and capacitive sensors or rotary encoders would—but they are safe to use in hazardous areas. NAMUR output sensors are ideal for applications where the presence of a volatile gas, vapor, dust, or fiber creates a possible hazard.


To prevent an explosion in hazardous areas, these sensors protect the circuit by operating at 8.2 V and less than 5 mA. These levels prevent the device from storing sufficient energy to initiate an explosion. NAMUR sensors are connected to an isolating amplifier, which limits the current and voltage to the sensor and amplifies the signal upon return.

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Topics: Applications, Capacitive Sensors, Inductive Sensors, Rotary Encoders

Ask an Expert Industrial Sensors - Episode 20

Posted by John Appleson on Thu, Sep 01, 2016

This episode of Ask an Expert for industrial sensors examines and provides answers to interesting sensing questions we've received from customers just like you. We explore and answer these questions:

  1. Can the inductive sensor NBB1.5-5GM25-E2-V3 detect non-ferrous metals? How does that affect the sensing range?
  2. An inductive sensor won't read above 500 rpm. What's the problem here?
  3. What does the fault error F-4 mean on an AS-Interface network?
  4. Does the MTT-6000 RFID reader need an antenna or read head?
  5. Do you have a capacitive sensor for high temperatures, about 150 °C?
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Topics: Ask an Expert, Inductive Sensors, Capacitive Sensors, AS-Interface, RFID

Ask an Expert Industrial Sensors - Episode 19

Posted by John Appleson on Fri, Jul 22, 2016

This episode of Ask an Expert for industrial sensors examines and provides answers to interesting sensing questions we've received from customers just like you. We explore and answer these questions:

1. Can the inductive sensor NJ6-F-N operate at -40 °C?
2. How far can a target reflector move sideways before a photoelectric sensor can't read it anymore?
3. Do you have distance sensors compatible with EtherNet/IP and ControlLogix Safety PLC?
4. What sensors could sense plastics and metals through a plastic tray?

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Topics: Inductive Sensors, Capacitive Sensors, Photoelectric Sensors, Ask an Expert, Laser Sensors, Distance Sensors, Positioning Systems

Anti-Swing Software and Inductive Sensors Raise Your Mobile Equipment to a Higher Level

Posted by Patricia Stafford on Thu, Jul 07, 2016

Controlling the motion of cranes, hoists, and other mobile equipment while avoiding accidents is a vital part of ensuring their safe and efficient operation. Vertical lift applications can be trickier and pose greater risks than working with horizontal conveyor belts, which tend to be more steady and predictable.

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Topics: Inductive Sensors, Applications, Positioning Systems, Inclination Sensors

Ask an Expert Industrial Sensors - Episode 18

Posted by John Appleson on Fri, Jun 10, 2016

This episode of Ask an Expert for industrial sensors examines and provides answers to interesting sensing questions we've received from customers just like you. We explore and answer these questions:

1. Can NJ40+U4+W inductive proximity switches be run in series?
2. Does the NBB4-F1-E0 inductive sensor come in a different Hz to eliminate mutual interference?
3. Do you have beam benders for photoelectric sensors?
4. Looking for a Class I, Div.1 inductive sensor that does not need an IS barrier...
5. Do you have a wire-draw displacement sensor?

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Topics: Rotary Encoders, Inductive Sensors, Photoelectric Sensors, Ask an Expert

Ask an Expert Industrial Sensors - Episode 17

Posted by John Appleson on Fri, May 06, 2016

This episode of Ask an Expert for industrial sensors examines and provides answers to interesting sensing questions we've received from customers just like you. We explore and answer these questions:

1. Motion detection sensor RMS-M-NA. Could this sensor be used to detect people in an area of a museum?
2. Can the capacitive sensor CJ40-FP-A2-P1 survive in a vacuumized vessel?
3. What is the Teach-in cable for the ultrasonic sensor UB100-F77-E2-V31, and how is it used?
4. Can you use an incremental rotary encoder with a higher PPR to replace one with a lower PPR?
5. What is the life expectancy of an inductive sensor in an outdoor, humid environment?

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Topics: Rotary Encoders, Inductive Sensors, Capacitive Sensors, Ultrasonic Sensors, Photoelectric Sensors, Ask an Expert

Ask an Expert Industrial Sensors: Episode 16

Posted by John Appleson on Fri, Mar 18, 2016

This episode of Ask an Expert for industrial sensors examines and provides answers to interesting sensing questions we've received from customers just like you. We explore and answer these questions:

1. Replacing a diffuse mode photoelectric sensor that is tied to an AS-Interface module.
2. Do you have MTTF data for the NMB1.5-8GM35-E0-FE inductive sensor?
3. Can diffuse mode sensors be used to detect metal drums in a hazardous area?
4. How to choose the correct power supply for RFID control interface unit IC-KP-B17-AIDA1?
5. Where on your website can I download AS-Interface system wiring guidelines and connection diagrams?

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Topics: Inductive Sensors, Cables/ Cordsets, AS-Interface, Photoelectric Sensors, Ask an Expert, RFID

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