Cylindrical Proximity Sensor
E2A3
High Quality for Extra Long
Distance
• CENELEC triple-distance operation.
• Normally open (NO), and normally closed (NC) mod-
els are available.
• Stainless steel and brass housings.
• 360° angle indicators
<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.
Ordering Information
DC 3-wire Models
Size
Type
Sensing
distance
Connection
Pre-wired
M8
Shielded
3.0mm
M12
connector
M8
connector
(3-pin)
Pre-wired
M12 Shielded
6.0mm
M12
connector
Pre-wired
M18 Shielded
11.0mm
M12
connector
Pre-wired
M30 Shielded
20.0mm
M12
connector
Brass
44 (59) mm
Brass
39 (54) mm
44 (65) mm
Brass
34 (49) mm
39 (60) mm
Body
material
Thread
length
27 (40) mm
Output
Operation mode: NO
E2A3-S08KS03-WP-B1 2M
E2A3-S08KS03-WP-C1 2M
E2A3-S08KS03-M1-B1
E2A3-S08KS03-M1-C1
E2A3-S08KS03-M5-B1
E2A3-S08KS03-M5-C1
E2A3-M12KS06-WP-B1 2M
E2A3-M12KS06-WP-C1 2M
E2A3-M12KS06-M1-B1
E2A3-M12KS06-M1-C1
E2A3-M18KS11-WP-B1 2M
E2A3-M18KS11-WP-C1 2M
E2A3-M18KS11-M1-B1
E2A3-M18KS11-M1-C1
E2A3-M30KS20-WP-B1 2M
E2A3-M30KS20-WP-C1 2M
E2A3-M30KS20-M1-B1
E2A3-M30KS20-M1-C1
Operation mode: NC
E2A3-S08KS03-WP-B2 2M
E2A3-S08KS03-WP-C2 2M
E2A3-S08KS03-M1-B2
E2A3-S08KS03-M1-C2
E2A3-S08KS03-M5-B2
E2A3-S08KS03-M5-C2
E2A3-M12KS06-WP-B2 2M
E2A3-M12KS06-WP-C2 2M
E2A3-M12KS06-M1-B2
E2A3-M12KS06-M1-C2
E2A3-M18KS11-WP-B2 2M
E2A3-M18KS11-WP-C2 2M
E2A3-M18KS11-M1-B2
E2A3-M18KS11-M1-C2
E2A3-M30KS20-WP-B2 2M
E2A3-M30KS20-WP-C2 2M
E2A3-M30KS20-M1-B2
E2A3-M30KS20-M1-C2
PNP
NPN
PNP
Stainless steel 27 (44) mm
NPN
(See note.)
PNP
27 (40) mm
NPN
34 (50) mm
PNP
NPN
PNP
NPN
PNP
NPN
PNP
NPN
PNP
NPN
PNP
NPN
Note:
Material specifications for stainless steel housing case: 1.4305 (W.-No.), SUS303 (AISI), 2346 (SS).
Cylindrical Proximity Sensor
E2A3
1
Connectivity
E2A3 Sensors are available with the following connectors and cable materials:
Pre-wired Models
Connector Models
Standard cable lengths are 2 m and 5 m.
For other cable lengths, please contact your OMRON
representative.
Standard cable material: PVC (4-mm dia.)
-WP
Standard connectors: M12, M8 (3-pin)
-M1, -M5
Model Number Legend
E2A@-@@@@@-@-@@-@@
1
2 3 4 5 6 7 8 9 10 11 12
Example:
E2A3-M12KS06-M1-B1
Triple distance, M12, standard barrel, shielded, Sn = 6 mm, M12 connector, PNP-NO
E2A3-S08KS03-WP-B1 2M Triple distance, M8 stainless steel, standard barrel, shielded, Sn = 3 mm, pre-wired PVC cable,
PNP-NO, cable length = 2 m
1. Basic name
E2A
2. Sensing technology
Blank:
3:
M:
S:
08:
12:
18:
30:
K:
L:
6. Shield
S:
N:
Shielded
Non-shielded
Standard double distance
Triple distance
Cylindrical, metric threaded, brass
Cylindrical, metric threaded, stainless steel
8 mm
12 mm
18 mm
30 mm
Standard length
Long body
12.Cable length
Blank:
Connector Model
Numeral: Cable length
8. Kind of connection
WP:
M1:
M5:
B:
C:
1:
2:
Pre-wired, PVC, 4-mm dia.
M12 connector (4-pin) *
M8 connector (3-pin)
DC, 3-wire, PNP open collector
DC, 3-wire, NPN open collector
Normally open (NO)
Normally closed (NC)
9. Power source and output
3. Housing shape and material
10.Operation mode
4. Housing size
11.Specials (e.g., cable material, oscillating frequency)
5. Barrel length
7. Sensing distance
Numeral: Sensing distance: e.g., 03 = 3 mm, 11 = 11 mm
2
Cylindrical Proximity Sensor
E2A3
Specifications
DC 3-wire Models
Size
Type
Item
Sensing distance
Ambient temp. of
−
25 to 70°C
Setting
distance
Ambient temp. of
−
10 to 60°C
Differential travel
Target
Standard sensing object
Response frequency (See note 1.)
Power supply voltage
(operating voltage range)
Current consumption
Output type
Control output
Indicator
Operation mode
Load current
Residual voltage
M18
M30
Shielded
Shielded
E2A3-S08KS03-@@-B@
E2A3-M12KS06-@@-B@ E2A3-M18KS11-@@-B@
E2A3-M30KS20-@@-B@
E2A3-S08KS03-@@-C@
E2A3-M12KS06-@@-C@ E2A3-M18KS11-@@-C@
E2A3-M30KS20-@@-C@
6 mm
±
10%
11 mm
±
10%
20 mm
±
10%
3 mm
±
10%
0 to 2.1 mm
0 to 2.4 mm
0 to 4.2 mm
0 to 4.8 mm
0 to 7.7 mm
0 to 8.8 mm
0 to 14 mm
0 to 16 mm
M8
Shielded
M12
Shielded
Protection circuits
Ambient air temperature
Temperature influence
Ambient humidity
Voltage influence
Insulation resistance
Dielectric strength
Vibration resistance
Shock resistance
20% max. of sensing distance
Ferrous metal (The sensing distance decreases with non-ferrous metal.)
18
×
18
×
1 mm
33
×
33
×
1 mm
60
×
60
×
1 mm
9
×
9
×
1 mm
700 Hz
350 Hz
250 Hz
80 Hz
12 to 24 VDC. Ripple (p-p): 10% max.
(10 to 32 VDC)
10 mA max.
-B models: PNP open collector
-C models: NPN open collector
200 mA max. (32 VDC max.)
2 V max. (under load current of 200 mA with cable length of 2 m)
Operation indicator (Yellow LED)
-B1/-C1 models: NO
-B2/-C2 models: NC
For details, refer to the timing charts.
Power source circuit re-
verse polarity protection, Output reverse polarity protection, Power source circuit reverse polarity protec-
Surge suppressor, Short- tion, Surge suppressor, Short-circuit protection
circuit protection
Operating:
−
25
°
C to 70
°
C, Storage:
−
25
°
C to 70
°
C
±
20% max. of sensing distance at 23
°
C within temperature range of
−
25
°
C to 70
°
C
−
10% max. to +20% of sensing distance at 23
°
C within temperature range of
−
10
°
C to 60
°
C
Operating: 35% to 95%, Storage: 35% to 95%
±
1% max. of sensing distance in rated voltage range
±
15%
50 M
Ω
min. (at 500 VDC) between current-carrying parts and case
1,000 VAC at 50/60 Hz for 1 min between current-carrying parts and case
10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions
500 m/s
2
, 10 times each
2
in X, Y, and Z directions 1,000 m/s , 10 times each in X, Y and Z directions
IP67 under IEC 60529
Standards and listings
EMC under EN60947-5-2
UL (CSA) E196555 (See note 2.)
-WP models: Pre-wired Models (4-mm dia. PVC cable with length of 2 m)
Connection method
-M1 models: M12 4-pin Connector Models
-M5 models: M8 3-pin Connector Models
Pre-wired Models Approx. 65 g
Approx. 85 g
Approx. 160 g
Weight
(packed state) Connector Models M12 Connector Models: Approx. 35 g
Approx. 70 g
Approx. 20 g
Case
Stainless steel
Brass-nickel plated
Sensing surface
PBT
Material
Cable
PVC
Clamping nut
Stainless steel
Brass-nickel plated
Approx. 280 g
Approx. 200 g
Note 1.
The response frequency is an average value. Measurement conditions are as follows: standard sensing object, a distance of twice the
standard sensing object length between sensing objects, and a set distance of half the sensing distance.
2.
UL (CSA) [E196555]: Use class 2 circuit only.
Cylindrical Proximity Sensor
E2A3
3
Engineering Data
Operating Range (Typical)
Sensing distance X (mm)
22
20
18
16
14
12
10
8
6
4
2
0
−30
−20
−10
0
10
20
30
E2A3-S08KS03
Y
X
E2A3-M30KS20
E2A3-M18KS11
E2A3-M12KS06
Distance Y (mm)
Influence of Sensing Object Size and Materials
E2A3-S08KS03
Sensing distance X (mm)
3.5
E2A3-M12KS06
Sensing distance X (mm)
7
Iron
E2A3-M18KS11
Sensing distance X (mm)
12
@d
3.0
2.5
2.0
X
@d
6
5
4
Brass
3
2
1
0
0
Aluminum
Copper
X
@d
X
10
t = 1 mm
t = 1 mm
t = 1 mm
Iron
Iron
Stainless steel (SUS303)
Stainless steel (SUS303)
Stainless steel (SUS303)
8
Brass
1.5
1.0
0.5
0.0
0
Aluminum
Copper
6
Brass
Aluminum
Copper
4
2
5
10
15
20
25
5
10
15
20
25
30
0
0
10
20
30
40
50
Side length of sensing object d (mm)
E2A3-M30KS20
Sensing distance X (mm)
25
Side length of sensing object d (mm)
Side length of sensing object d (mm)
@d
X
20
t = 1 mm
Iron
Stainless steel (SUS303)
15
Brass
10
Aluminum
Copper
5
0
0
10
20
30
40
50
60
Side length of sensing object d (mm)
4
Cylindrical Proximity Sensor
E2A3
Operation
DC 3-wire Models
PNP Output
Operation mode
Model
Non-sensing area
Sensing
object
(%)
100
Rated
sensing
distance
ON
OFF
Yellow indicator
Control output
0
Proximity
Sensor
main
circuits
Timing chart
Sensing area
Output circuit
Proximity
Sensor
Brown
+V
Black
(See note 1.)
Load
Blue
0V
NO
E2A3-@-@-B1
ON
OFF
Note 1:
With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector M8 Connector
Pin Arrangement
(3-pin)
(See note 2.) Pin Arrangement
1
2
3
4
1
4
3
Note 2:
Terminal 2 of the M12 connector is not used.
Non-sensing area
Sensing
object
(%)
100
Rated
sensing
distance
ON
OFF
ON
OFF
Control output
Yellow indicator
0
Proximity
Sensor
main
circuits
Sensing area
Proximity
Sensor
Brown
+V
Black
(M8 connector:
(See note 1.)
Load
Blue
)
0V
NC
E2A3-@-@-B2
Note 1:
With M8 Size Models, there is no output reverse
polarity protection diode.
M12 Connector M8 Connector
(3-pin)
Pin Arrangement
(See note 2.) Pin Arrangement
1
2
3
4
1
4
3
Note 2:
Terminal 4 of the M12 connector is not used.
Cylindrical Proximity Sensor
E2A3
5
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