1
CSM_E2K-X_DS_E_3_1
Cylindrical Proximity Sensor
E2K-X
General-purpose Threaded Sensor
That Detects Metals and Non-metals
Alike
• Detects both metallic and nonmetallic objects (water, oil, glass,
plastic, etc.).
• Three choices of threaded cylinder sizes for easy installation: M12,
M18, and M30.
• Fixed sensing distance requires no sensitivity adjustment.
Be sure to read Safety Precautions on
page 5.
Ordering Information
Sensors
Accessories (Order Separately)
Mounting Brackets
Refer to Y92
@
for details.
Appearance Sensing distance Output configuration
Model
Operation mode
NO NC
M12 DC 3-wire, NPN E2K-X4ME1 2M E2K-X4ME2 2M
AC 2-wire E2K-X4MY1 2M E2K-X4MY2 2M
M18 DC 3-wire, NPN E2K-X8ME1 2M E2K-X8ME2 2M
AC 2-wire E2K-X8MY1 2M E2K-X8MY2 2M
M30 DC 3-wire, NPN E2K-X15ME1 2M E2K-X15ME2 2M
AC 2-wire E2K-X15MY1 2M E2K-X15MY2 2M
Unshielded
4 mm
8 mm
15 mm
E2K-X
2
Ratings and Specifications
*1. The above values are sensing distances for the standard sensing object. Refer to Engineering Data on page 3 for other materials.
*2. E Models (DC switching models): A full-wave rectification power supply of 24 VDC ±20% (average value) can be used.
Item Model E2K-X4ME@,
E2K-X4MY@
E2K-X8ME@,
E2K-X8MY@
E2K-X15ME@,
E2K-X15MY@
Sensing distance 4mm ±10% 8 mm ±10% 15 mm ±10%
Set distance *10 to 2.8 mm 0 to 5.6 mm 0 to 10 mm
Differential travel 4% to 20% of sensing distance
Detectable object Conductors and dielectrics
Standard sensing object Grounded metal plate: 50 × 50 × 1 mm
Response frequency E Models: 100 Hz, Y Models: 10 Hz
Power supply voltage*2
(operating voltage range)
E Models: 12 to 24 VDC (10 to 30 VDC)
Y Models: 100 to 220 VAC (90 to 250 VAC)
Current consumption E Models: 15 mA max.
Leakage current Y Models: 2.2 mA max. (Refer to page 4.)
Control
output
Load current E Models: 200 mA max.*2, Y Models: 10 to 200 mA
Residual voltage E Models: 1 V max. (Load current: 200 mA, Cable length: 2 m), Y Models: Refer to Engineering Data on page 4.
Indicators E Models: Detection indicator (red), Y Models: Operation indicator (red)
Operation mode
(with sensing object
approaching)
E1/Y1 Models: NO
E2/Y2 Models: NC
Protection circuits E Models: Reverse polarity protection, Surge suppressor, Y Models: Surge suppressor
Ambient temperature
range Operating/Storage: −25 to 70°C (with no icing or condensation) Operating/Storage: −10 to 55°C
(with no icing or condensation)
Ambient humidity range Operating/Storage: 35% to 95% (with no condensation)
Temperature influence ±20% max. of sensing distance at 23°C in the operating temperature range
Voltage influence E Models: ±2% max. of sensing distance at rated voltage at rated voltage ±20%
Y Models: ±2% max. of sensing distance at rated voltage at rated voltage ±10%
Insulation resistance 50 MΩ min. (at 500 VDC) between current-carrying parts and case
Dielectric strength E Models: 1,000 VAC, 50/60 Hz for 1 min between current-carrying parts and case
Y Models: 2,000 VAC, 50/60 Hz for 1 min between current-carrying parts and case
Vibration resistance Destruction: 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
Shock resistance Destruction: 500 m/s2 3 times each in X, Y, and Z directions
Degree of protection IP66 (IEC), in-house standards: oil-resistant
Connection method Pre-wired Models (Standard cable length: 2 m)
Weight (packed state) Approx. 65 g Approx. 145 g Approx. 205 g
Materi-
als
Case Heat-resistant ABS
Sensing surface
Clamping nuts Polyacetal
Accessories Tightening tool, Instruction Manual Instruction manual
Refer to the timing charts under I/O Circuit Diagrams on page 4 for details.
E2K-X
3
Engineering Data (Typical)
Sensing Area (Grounded Metal Plate)
E2K-X4M
Influence of Sensing Object Size and Material
E2K-X4M E2K-X8M E2K-X15M
Sensing Object Thickness and Material vs. Sensing Distance
E2K-X4M E2K-X8M E2K-X15M
−20−5
0
2
4
6
8
10
12
14
16
18
Y
X
E2K-X4M
E2K-X8M
E2K-X15M
2520151050−5−10−15
Distance
Y (mm)
E2K-X4M Sensing
E2K-X8M Sensing Head
E2K-X15M Sensing Head
Standard sensing
object Grounded
metal plate
50 × 50 × 1 mm
Distance X (mm)
20100
1
2
3
4
5
X
7060504030
d ×
d t = 3 mm
Glass
Phenol
Grounded metal
Non-grounded metal
Side length of sensing object: d (mm)
Distance X (mm)
20100
2
4
6
8
10
X
7060504030
d ×
d t = 3 mm
Grounded metal
Non-grounded metal
Glass
Phenol
Side length of sensing object: d (mm)
Acryl
Distance X (mm)
20100
5
10
15
20
25
X
7060504030
d ×
d t = 3 mm
Grounded metal
Non-grounded metal
Glass
Phenol
Side length of sensing object: d (mm)
Acryl
Distance X (mm)
5
0
1
2
3
4
5
X
t
25201510
50 ×
50
Thickness of sensing object: t (mm)
Grounded metal
Non-grounded metal
Glass
Phenol
Distance X (mm)
1050
2
4
6
8
10
Xt
252015
50 ×
50
Thickness of sensing object: t (mm)
Grounded metal
Non-grounded metal
Glass
Phenol
Acryl
Distance X (mm)
50
5
10
15
20
25
Xt
25201510
50 ×
50
Thickness of sensing object: t (mm)
Grounded metal
Non-grounded metal
Glass
Phenol
Acryl
Distance X (mm)
E2K-X
4
I/O Circuit Diagrams
DC 3-Wire Models
AC 2-Wire Models
Leakage Current Residual Output Voltage
E2K-X@MY E2K-X@MY@at 100 VAC E2K-X@MY@at 200 VAC
0
1.0
1.5
2.0
300200100
V
mA
Power su
pp
l
y
volta
g
e
(
V
)
(OFF)
Protective resistance
AC
power,
50/60Hz
Leakage current (mA)
40
60
80
100
120
0
20
5030201053
VL
100 VAC
V
A
ON
200100
OFF
Residual output voltage
Residual
Load Voltage
Load current
(
mA
)
Load voltage VL (V)
80
120
160
200
240
VL
200 VAC
V
A
ON
20
0
100503020
OFF
1053
0
40
Residual output voltage
Residual
Load
Voltage
Load current
(
mA
)
Load voltage VL (V)
Operation
mode Model Timing chart Output circuit
NO
E2K-X4ME1
E2K-X8ME1
E2K-X15ME1
NC
E2K-X4ME2
E2K-X8ME2
E2K-X15ME2
Operation
mode Model Timing chart Output circuit
NO
E2K-X4MY1
E2K-X8MY1
E2K-X15MY1
NC
E2K-X4MY2
E2K-X8MY2
E2K-X15MY2
Present
Not present
Operate
Reset
High
Low
ON
OFF
Load (between brown
and black leads)
Sensing object
Output voltage (between
black and blue leads)
Detection indicator (red)
2.2 Ω
4.7 kΩ
100 Ω
0 V
Tr
+V
*1. Load current: 200 mA max.
*2. When a transistor is connected.
Proximity
Sensor
main
circuit
Brown
Blue
Black*1
Output*2
Load
Present
Not present
Operate
Reset
High
Low
ON
OFF
Load (between brown
and black leads)
Sensing object
Output voltage (between
black and blue leads)
Detection indicator (red)
Present
Not present
Operate
Reset
ON
OFF
Load
Sensing object
Operation indicator (red) Proximity
Sensor
main
circuit
Load
Brown
Blue
Present
Not present
Operate
Reset
ON
OFF
Load
Sensing object
Operation indicator (red)
E2K-X
5
Safety Precautions
Refer to Warranty and Limitations of Liability.
This product is not designed or rated for ensuring
safety of persons either directly or indirectly.
Do not use it for such purposes.
Do not use this product under ambient conditions that exceed the
ratings.
● Design
Ambient Environment
The Sensor may malfunction if subjected to water, oil, chemicals, or
condensation by falsely detecting these as sensing objects.
The E2K-X15M is highly sensitive to inductive objects and can thus
be affected even by small quantities of water drops.
Influence of Surrounding Objects
If the Sensor is embedded in metal, maintain at least the following
distances between the Sensor and the metal. The Sensor is also
affected by other materials, such as resins. Separate the Sensor from
other materials by the same distance as for metal.
* Be sure to ground the metal object, otherwise Sensor operation will not be
stable.
Influence of Surrounding Metal (Unit: mm)
If a mounting bracket is used, be sure that at least the following
distances are maintained.
Mutual Interference
When installing Sensors face-to-face or side-by-side, ensure that the
minimum distances given in the following table are maintained.
Mutual Interference (Unit: mm)
Sensing Objects
The maximum sensing distance will decrease if the sensing object is
a non-grounded metal object or dielectric object.
•Sensing Object Material
The E2K-X can detect almost any type of object. The sensing
distance of the E2K-X, however, will vary with the electrical
characteristics of the object, such as the conductance and
inductance of the object, and the water content and capacity of the
object. The maximum sensing distance of the E2K-X will be
obtained if the object is made of grounded metal.
•There are objects that cannot be detected indirectly. Therefore, be
sure to test the E2K-X in a trial operation with the objects before
using the E2K-X in actual applications.
Effects of a High-frequency Electromagnetic Field
The E2K-X may malfunction if there is an ultrasonic washer, high-
frequency generator, transceiver, or inverter nearby.
For major measures, refer to Noise of Warranty and Limitations of
Liability for Photoelectric Sensors.
Mounting
Do not tighten the nut with excessive force. Always use washers when
tightening the nuts and do not exceed the torque in the following table.
Note: A special tightening tool is provided with the E2K-X4M@@. Always use
this tool to tighten the nuts.
● Miscellaneous
Organic Solvents
The Sensor has a case made of heat-resistant ABS resin. Be sure
that the case is free from organic solvents or solutions containing
organic solvents.
WARNING
Precautions for Correct Use
Model Dimension l d m n
E2K-X4M 20 50
8
60
E2K-X8M 12
E2K-X15M 10 25
Model Dimension A B
E2K-X4M 80 70
E2K-X8M 150 110
E2K-X15M 300 200
n
m
d dia.
l
*
Be sure to ground. Metal object
G
H
I
n
fl
uence o
f
S
urroun
di
ng
M
eta
l
(Unit: mm)
Model Dimension G H
E2K-X4M 20 30
E2K-X8M
E2K-X15M 10
AB
Model Torque
E2K-X4M 0.78 N·m
E2K-X8M 2 N·m
E2K-X15M
E2K-X
6
Dimensions (Unit: mm)
Tolerance class IT16 applies to dimensions in this data sheet unless otherwise specified.
44
20
60
80
17
10.7 dia.
21 dia.
*1
M12 × 1
Indicator *2
Two clamping nuts
Two washers
*1. E Models: 4-dia. vinyl-insulated round cable with 3 conductors
(Conductor cross section: 0.2 mm2, Insulator diameter: 1.2 mm),
Standard length: 2 m
Y Models: 4-dia. vinyl-insulated round cable with 2 conductors
(Conductor cross section: 0.3 mm2, Insulator diameter: 1.3 mm),
Standard length: 2 m
*2. E Models: Detection indicator (red)
Y Models: Operation indicator (red)
E2K-X4ME
@
E2K-X4MY@
E2K-X8ME
@
E2K-X8MY@
44
20
60
80
24
16.6 dia.
29 dia.
M18 × 1
*1
Indicator *2
Two clamping nuts
Two washers
*1. E Models: 6-dia. vinyl-insulated round cable with 3 conductors
(Conductor cross section: 0.5 mm2, Insulator diameter: 1.9 mm),
Standard length: 2 m
Y Models: 6-dia. vinyl-insulated round cable with 2 conductors
(Conductor cross section: 0.5 mm2, Insulator diameter: 1.9 mm),
Standard length: 2 m
*2. E Models: Detection indicator (red)
Y Models: Operation indicator (red)
5510
60
80
36
28.1 dia.
42 dia.
*1
M30 × 1.5
Indicator *2
Two clamping nuts
Two washers
*1. E Models: 6-dia. vinyl-insulated round cable with 3 conductors
(Conductor cross section: 0.5 mm2, Insulator diameter: 1.9 mm),
Standard length: 2 m
Y Models: 6-dia. vinyl-insulated round cable with 2 conductors
(Conductor cross section: 0.5 mm2, Insulator diameter: 1.9 mm),
Standard length: 2 m
*2. E Models: Detection indicator (red)
Y Models: Operation indicator (red)
E2K-X15ME@
E2K-X15MY@
Mounting Hole Dimensions
Model F (mm)
E2K-X4ME@
E2K-X4MY@12.5 dia.
E2K-X8ME@
E2K-X8MY@18.5 dia.
E2K-X15ME@
E2K-X15MY@30.5 dia.
+0.5
0
+0.5
0
+0.5
0
F
Read and Understand This Catalog
Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or
comments.
Warranty and Limitations of Liability
WARRANTY
OMRON's exclusive warranty is that the products are free from defects in materials and workmanship for a period of one year (or other period if specified)
from date of sale by OMRON.
OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, REGARDING NON-INFRINGEMENT, MERCHANTABILITY, OR
FITNESS FOR PARTICULAR PURPOSE OF THE PRODUCTS. ANY BUYER OR USER ACKNOWLEDGES THAT THE BUYER OR USER ALONE HAS
DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. OMRON DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED.
LIMITATIONS OF LIABILITY
OMRON SHALL NOT BE RESPONSIBLE FOR SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR COMMERCIAL LOSS
IN ANY WAY CONNECTED WITH THE PRODUCTS, WHETHER SUCH CLAIM IS BASED ON CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT
LIABILITY.
In no event shall the responsibility of OMRON for any act exceed the individual price of the product on which liability is asserted.
IN NO EVENT SHALL OMRON BE RESPONSIBLE FOR WARRANTY, REPAIR, OR OTHER CLAIMS REGARDING THE PRODUCTS UNLESS
OMRON'S ANALYSIS CONFIRMS THAT THE PRODUCTS WERE PROPERLY HANDLED, STORED, INSTALLED, AND MAINTAINED AND NOT
SUBJECT TO CONTAMINATION, ABUSE, MISUSE, OR INAPPROPRIATE MODIFICATION OR REPAIR.
Application Considerations
SUITABILITY FOR USE
OMRON shall not be responsible for conformity with any standards, codes, or regulations that apply to the combination of products in the customer's
application or use of the products.
At the customer's request, OMRON will provide applicable third party certification documents identifying ratings and limitations of use that apply to the
products. This information by itself is not sufficient for a complete determination of the suitability of the products in combination with the end product,
machine, system, or other application or use.
The following are some examples of applications for which particular attention must be given. This is not intended to be an exhaustive list of all possible
uses of the products, nor is it intended to imply that the uses listed may be suitable for the products:
•
Outdoor use, uses involving potential chemical contamination or electrical interference, or conditions or uses not described in this catalog.
•
Nuclear energy control systems, combustion systems, railroad systems, aviation systems, medical equipment, amusement machines, vehicles,
safety equipment, and installations subject to separate industry or government regulations.
•
Systems, machines, and equipment that could present a risk to life or property.
Please know and observe all prohibitions of use applicable to the products.
NEVER USE THE PRODUCTS FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY WITHOUT ENSURING THAT THE
SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCTS ARE PROPERLY RATED AND
INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM.
PROGRAMMABLE PRODUCTS
OMRON shall not be responsible for the user's programming of a programmable product, or any consequence thereof.
Disclaimers
CHANGE IN SPECIFICATIONS
Product specifications and accessories may be changed at any time based on improvements and other reasons.
It is our practice to change model numbers when published ratings or features are changed, or when significant construction changes are made.
However, some specifications of the products may be changed without any notice. When in doubt, special model numbers may be assigned to fix or
establish key specifications for your application on your request. Please consult with your OMRON representative at any time to confirm actual
specifications of purchased products.
DIMENSIONS AND WEIGHTS
Dimensions and weights are nominal and are not to be used for manufacturing purposes, even when tolerances are shown.
PERFORMANCE DATA
Performance data given in this catalog is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the
result of OMRON’s test conditions, and the users must correlate it to actual application requirements. Actual performance is subject to the OMRON
Warranty and Limitations of Liability.
ERRORS AND OMISSIONS
The information in this document has been carefully checked and is believed to be accurate; however, no responsibility is assumed for clerical,
typographical, or proofreading errors, or omissions.
2008.11
In the interest of product improvement, specifications are subject to change without notice.
OMRON Corporation
Industrial Automation Company
http://www.ia.omron.com/
(c)Copyright OMRON Corporation 2008 All Right Reserved.
