4-Wire NPN Magnetic Proximity Sensors
Last Updated: April 1, 2025
Description
4-Wire NPN Magnetic Proximity Sensors are devices designed to detect the presence of ferromagnetic targets. They operate by utilizing an external magnetic field to trigger a response when a target, typically a permanent magnet, comes within proximity. These sensors are commonly housed in various configurations such as barrel or rectangular housings, and they are equipped with either normally open (NO) or normally closed (NC) switch types.
Working Principle
The working principle of 4-Wire NPN Magnetic Proximity Sensors involves the use of reed switches, which are magnetically actuated. These sensors contain two ferromagnetic reeds sealed within a glass capsule. When a magnetic field is present, the reeds are drawn together, closing the circuit and allowing the sensor to detect the target. This mechanism makes them particularly useful for detecting the presence of ferromagnetic materials, as the magnetic field can penetrate non-ferromagnetic barriers, providing reliable detection in various environments.
Applications
4-Wire NPN Magnetic Proximity Sensors are widely used in security alarm systems to detect the opening of doors. They are also employed in industrial automation for position sensing and in robotics for detecting the presence of metallic objects. Their ability to function in harsh environments makes them suitable for use in outdoor applications where exposure to elements is a concern.
Advantages over other Magnetic Proximity Sensors
One of the advantages of 4-Wire NPN Magnetic Proximity Sensors is their ability to provide a more stable and reliable output due to the additional wiring configuration. This can result in improved signal integrity and reduced susceptibility to electrical noise, which is beneficial in environments with high electromagnetic interference.
Limitations
A limitation of these sensors is their reliance on the presence of a magnetic field, which means they can only detect ferromagnetic materials. Additionally, their performance can be affected by the distance between the sensor and the target, as well as the strength of the magnetic field, which may limit their use in certain applications where precise detection is required.
Considerations
When considering the use of 4-Wire NPN Magnetic Proximity Sensors, it is important to evaluate the initial costs, which can vary based on the housing and configuration. Operating expenses are generally low, but factors such as durability and accuracy should be assessed to ensure the sensor meets the application's requirements. Maintenance costs are typically minimal due to the sensor's robust design, but replacement costs should be considered if the sensor is used in environments with high wear and tear.
from Fargo Controls, Inc.
Features: Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon request [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.1575
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon request [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.0787
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.1575
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.1969
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.3150
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.1969
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 1
- Operation Distance: 0.3150
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.4000
- Operation Distance: 0.3150
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.4000
- Operation Distance: 0.3150
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.2000
- Operation Distance: 0.6299
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Extended operating distance. Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon... [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.2000
- Operation Distance: 0.6299
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon request [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.3000
- Operation Distance: 0.3937
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Short circuit & reverse polarity protection. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator. 5 and 10 meter cable lengths available upon request. +100 °C high temperature version available upon request [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.3000
- Operation Distance: 0.5906
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Adjustable operating distance up to 60 mm. 4 wire DC models have both NO and NC outputs. Short circuit & reverse polarity protection in DC versions. Protection degree IP67: dust tight and protection from the effects of immersion. LED function indicator [See More]
- Output Load: DC Load; 4-Wire NPN
- Switching Frequency: 0.3000
- Operation Distance: 0.5906
- Operating Temperature: -13 to 158
from Fargo Controls, Inc.
Features: Internal diameters of 5, 12, 15, 22, 25, 30, 44, 63, 100 mm. Adjustable sensitivity. Delay ON/OFF switch. LED function indicator. Short circuit & reverse polarity protection. Pre-wired cable or connector models. 5 and 10 meter cable lengths upon request. CE Marked. Protection degree... [See More]
- Output Load: DC Load; 4-Wire NPN
- Operating Temperature: -13 to 158
- Operation Distance: 0.1969
- Power Requirements: DC Powered
from Eaton Corporation - Sensors
The Cutler-Hammer ® AccuProx ™ from Eaton's electrical business is a high performance analog inductive proximity sensor. The AccuProx family of analog sensors provide unmatched sensing range, linearity and resolution in an affordable and compact tubular package. Unlike standard inductive... [See More]
- Output Load: DC Load; 4-Wire NPN; 4-Wire PNP
- Operating Temperature: -40 to 158
- Operation Distance: 0.0197 to 0.1575
- Power Requirements: DC Powered
from Euchner-U.S.A., Inc.
Safety photocells for the protection of workers exposed to risks arising from the use of dangerous machines (according to category 2). Used in conjunction with the AU SX or the AU SXM control units, ILION forms a type 2 photoelectric safety system in compliance with the Standards EN 61496-1 and IEC... [See More]
- Output Load: AC Load; DC Load; 2-Wire; 3-Wire NPN; 3-Wire PNP; 4-Wire NPN; 4-Wire PNP
- Repeatability: 3.94 to 15.75
- Operation Distance: 0.0394 to 0.5906
- Switching Frequency: 0.0100 to 4
from CARLO GAVAZZI Automation Components
Inductive proximity switch with sensing distance 10 mm flush mounted in metal or 15 mm non-flush mounted. 4-wire with both make (NO) and break (NC) switching. Flat pack housing size (W x H x D) 35 x 55 x 15 mm made in polycarbonate. Easy mounting with only two M 3.5 screws. Ideal for use in... [See More]
- Output Load: DC Load; 4-Wire NPN; 4-Wire PNP
- Switching Frequency: 0.2500 to 0.5000
- Operation Distance: 0.3937 to 0.5906
- Operating Temperature: -13 to 158
from Eaton Corporation - Sensors
The Cutler-Hammer ® E51 Series 6P+ inductive proximity sensors are fully sealed, pre-wired and designed specifically to ensure reliability under the most adverse environmental conditions. They have been proven to withstand the penetrating properties of dirt, dust, grit, extreme temperatures and... [See More]
- Output Load: DC Load; 4-Wire NPN
- Operating Temperature: -13 to 158
- Operation Distance: 0.0 to 0.5118
- Power Requirements: DC Powered
from CARLO GAVAZZI Automation Components
Inductive proximity switch in standard limit switch housing. Rugged polyester housing. Sensing face adjustable in up to 5 positions. 2-wire AC/DC for maximum efficiency. Rotable-head, 5 positions. Mounting dimensions in accordance with DIN 43694. Thermoplastic polyester housing. Sensing distance: 30... [See More]
- Output Load: AC Load; DC Load; 4-Wire NPN; 4-Wire PNP
- Switching Frequency: 0.0250 to 0.1000
- Operation Distance: 1.18
- Operating Temperature: -13 to 158
from Eaton Corporation - Sensors
The Cutler-Hammer ® E56 Series is a high performance inductive proximity sensor. The E56 Pancake provides greater sensing ranges than other inductive sensor package types. The E56 Pancake family provides convenience and ease of wiring with auto-configurable, complementary outputs. [See More]
- Output Load: DC Load; 4-Wire NPN
- Operating Temperature: -13 to 158
- Operation Distance: 0.0 to 1.57
- Power Requirements: AC Powered
from CARLO GAVAZZI Automation Components
ICB series is a complete family of high performance inductive sensors and represents Carlo Gavazzi standard solution for industrial automation equipments. It is available in three diameters: M12, M18 and M30, in standard and extended sensing ranges, long and short rugged nickel-plated brass... [See More]
- Output Load: DC Load; 4-Wire NPN; 4-Wire PNP
- Switching Frequency: 1 to 2
- Operation Distance: 0.0787 to 0.8661
- Operating Temperature: -13 to 158