Induction sensors don´t need a touch, they´re satisfied by proximity

Proximity sensors working on an induction principle are able to detect ferrous and non-ferrous metals very reliably.

This is an archive article published 10/16/2014. Some information may no longer be up to date and in line with the current state. Please contact us in case of interest.

For those of you, who already work in this field, there´s everything clear for you probably and you know well, that induction sensors are literally one of the keystones for an industrial automation. For all of you, who´re not familiar with these important components yet, we bring this short description.
Induction sensors use the fact, that metal parts placed near an oscillator coil are able to change condition in a given oscillating circuit. Such a change (stopping of oscillations) can be reliably evaluated and to gain a confirmation about a presence of a metal subject in the sensor´s range. Induction sensors typically work on a frequency of hundreds of Hz up to a few kHz.

The bigger the size of a coil (and also a sensor), usually the higher is the resulting sensitivity of a sensor (sensing range). But at the same time a bigger sensor usually works on a lower frequency, that´s why even a maximum sensing frequency is lower. From this reason it´s usually better to use a smaller type to detect fast moving objects.

Omron, as a top class producer of industrial sensors has in its portfolio a lot of series of induction proximity sensors, in numerous versions. A typical representative of well-known widely used sensors is the Omron E2A series. E2A has increased detection range and it´s encapsulated in a body from a nickel pated brass (M12-M30) or a stainless steel (M8). A lot of versions and diameters can be found here (M8/M12/M18/M30), versions with connectors or wire leads and also shielded and unshielded versions.

„Shielded” means, that a metal sensor body reaches up to the front (sensing) portion of a sensor. In case of non-shielded versions the metal package is shorter, i.e. the plastic part seems to stand out of the sensor body. The result is that a non-shielded version is more sensitive even to sides (x), what can be advantageous in some applications. On the other hand, shielded versions provide possibility of a very close assembly of sensors next to each other. Series E2A has a high resistance to dust and water (IP67/ IP69k), shocks, vibrations, heat as well as electromagnetic interference.
E2A series is primarily intended for ferrous metals, but with a smaller sensitivity it´s also usable for non-ferrous metals. However in the Omron offer can be found series specially intended for aluminium and other non-ferrous metals and even types which are non-sensitive to ferrous metals.

A typical output of an induction sensor is a transistor (open collector) - PNP or NPN with protection components (diode + transil). Output transistor can be used to connect to an intelligent control unit, or for direct switching of circuits, or switching of relays.
Overview of Omron offer and hints for usage can be found in the Omron induction sensors application guide. Detailed description of the E2A brings the Omron E2A datasheet. Answers to many questions can be found on the Omron proximity sensors FAQs webpage. In case of interest in any Omron product please contact us at info@soselectronic.com.

Induction sensors don´t need a touch, they´re satisfied by proximity
Induction sensors don´t need a touch, they´re satisfied by proximity

Advantages/ Features of the E2A series:

  • induction proximity sensors (non-contact) with increased sensing range
  • sensing range 2-30mm (depending on a type)
  • dust, smoke, water or oil don´t affect detection
  • wide range of working temperatures -40 to +70°C
  • IP 67 (IEC60529), IP69k (DIN 40050 part 9)
  • resistant to vibrations and EMI
  • 12-24V power supply (operating range 10-32V)
  • NPN or PNP transistor output, 3 wires (NO or NC) or 4 wires (NO+NC)
  • simple installation by means of 2 nuts

Do not miss these articles

Do you like our articles? Do not miss any of them! You do not have to worry about anything, we will arrange delivery to you.

Related product categories

Additional products


E2A-M12KN08-WP-B1 2M OMRON IA  
E2A-M12KN08-WP-B1 2M

Inductive Proximity Sensor M12 PNP-NO, 3-wire, Dist. 8mm, Cable 2m, Unshielded

Inductive Sensors

Ord. No.: 71082
Manufacturer: OMRON IA
in stock 7 pcs
(07/08/2022: 1 pcs)
(We are checking the delivery date: 2 pcs)
1 pcs+
2 pcs+
8 pcs+
46,13 €
44,95 €
41,08 €
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare

E2A-M12KS04-M1-B1 OMRON IA  
E2A-M12KS04-M1-B1

Inductive Proximity Sensor M12 PNP-NO, 3-wire Dist. 4mm, Connector M12, Shielded

Inductive Sensors

Ord. No.: 71083
Manufacturer: OMRON IA
No longer available

E2A-M12KS04-WP-B1 2M OMRON IA  
E2A-M12KS04-WP-B1 2M

Inductive Proximity Sensor M12 PNP-NO, 3-wire, Dist. 4mm, Cable 2m, Shielded

Inductive Sensors

Ord. No.: 71084
Manufacturer: OMRON IA
in stock 2 pcs
1 pcs+
2 pcs+
8 pcs+
42,30 €
41,20 €
37,70 €
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare

E2A-M18KN16-M1-B1 OMRON IA  
E2A-M18KN16-M1-B1

Inductive Proximity Sensor M18 PNP-NO, 3-wire, Dist. 16mm, Connector M12, Unshielded

Inductive Sensors

Ord. No.: 71085
Manufacturer: OMRON IA
in stock 2 pcs
1 pcs+
2 pcs+
8 pcs+
42,50 €
41,40 €
37,80 €
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare

E2A-M18KN16-WP-B1 2M OMRON IA  
E2A-M18KN16-WP-B1 2M

Inductive Proximity Sensor M18 PNP-NO, 3-wire, Dist. 16mm, Cable 2m, Unshielded

Inductive Sensors

Ord. No.: 71086
Manufacturer: OMRON IA
in stock 2 pcs
1 pcs+
2 pcs+
8 pcs+
42,50 €
41,40 €
37,90 €
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare

E2A-M18KS08-M1-B1 OMRON IA  
E2A-M18KS08-M1-B1

Inductive Proximity Sensor M18 PNP-NO, 3-wire, Dist. 8mm, Connector M12, Shielded

Inductive Sensors

Ord. No.: 71087
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2A-M18KS08-WP-B1 2M OMRON IA  
E2A-M18KS08-WP-B1 2M

Inductive Proximity Sensor M18 PNP-NO, 3-wire, Dist. 8mm, Cable 2m, Shielded

Inductive Sensors

Ord. No.: 71088
Manufacturer: OMRON IA
No longer available

E2A-S08KS02-M5-B1 OMRON IA  
E2A-S08KS02-M5-B1

Inductive Proximity Sensor M8 PNP-NO, 3-wire, Dist. 2mm, Connector M8, Shielded

Inductive Sensors

Ord. No.: 71090
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2A-S08KS02-WP-B1 2M OMRON IA  
E2A-S08KS02-WP-B1 2M

Inductive Proximity Sensor M8 PNP-NO, 3-wire, Dist. 2mm, Cable 2m, Shielded

Inductive Sensors

Ord. No.: 71091
Manufacturer: OMRON IA
in stock 4 pcs
1 pcs+
2 pcs+
8 pcs+
45,90 €
43,90 €
40,90 €
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare

E2A-M12KN08-WP-B1 5M OMRON IA  
E2A-M12KN08-WP-B1 5M

Inductive Proximity Sensor M12 PNP-NO, 3-wire, Dist. 8mm, Cable 5m, Unshielded

Inductive Sensors

Ord. No.: 79309
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2A-M12LS04-WP-B1 2M OMRON IA  
E2A-M12LS04-WP-B1 2M

Inductive Proximity Sensor M12 PNP-NO, 3-wire, Dist. 4mm, Cable 2m, Shielded

Inductive Sensors

Ord. No.: 157130
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2A-M30LS15-WP-B1 2M OMRON IA  
E2A-M30LS15-WP-B1 2M

Inductive Proximity Sensor M30 PNP-NO, 3-wire, Dist. 15mm, Cable 2m, Shielded

Inductive Sensors

Ord. No.: 71089
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2C-EM07M OMRON IA  
E2C-EM07M

Inductive Proximity Sensor M18, Dist. 7mm, Cable, Unshielded

Inductive Sensors

Ord. No.: 160750
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2E-X2D1-N 2M OMS OMRON IA  
E2E-X2D1-N 2M OMS

Inductive Proximity Sensor M8 NPN-NO, 2-wire, Dist. 2mm, Cable 2m, Shielded

Inductive Sensors

Ord. No.: 167610
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote

E2E-X2D1-N 5M OMS OMRON IA  
E2E-X2D1-N 5M OMS

Inductive Proximity Sensor M8 NPN-NO, 2-wire, Dist. 2mm, Cable 5m, Shielded

Inductive Sensors

Ord. No.: 173443
Manufacturer: OMRON IA
ORDER:
  • ADD TO CART
  • Get Quote
  • Add to favorites
  • Add to watchdog
  • Add item to compare
Get Quote
Do you agree with cookies being stored?
Welcome to the SOS electronic website. Before you enter our online world, we would like to ask you to allow us to store cookies on your browser. Your consent will help us view the site without error, measure its performance, and track additional statistics. Apart from that, we can bring you an offer of our products and services, literally tailor-made. We also provide cookies to third parties. However, you are definitely safe with us.
The proper operation of the website
More stable technical control
Better marketing offer

More about cookies
More about personal data processing