1
“Mini” Photoelectric Sensor E3T
High cost-performance “Mini”
Photoelectric Sensor Saves Installation
Space and Wiring Effort and Detects
Minute Sensing Objects
“Pin-point”
beam (1 to 2-mm dia.) makes it possible
to detect minute sensing objects.
Saves wiring effort, even with compact body.
Work steps can be reduced to half with the
retroreflective or limited reflective model.
Easy-to-use
with a clearly-visible “Pin-point”
beam.
Long sensing distance of 1 meter is possible with
the through-beam model.
Ordering Information
Photoelectric Sensors
Item Sensing
method
Through-beam Retroreflec-
tive
Diffuse re
-
flective
Limited reflective
Appearance Side-view Flat Side-view Flat Side-view
pp
Sensing distance
1 m 500 mm 200 mm
(10 mm)
(see note)
5 to 30 mm 5 to 15 mm 5 to 30 mm
Model Light-ON NPN E3T-ST11 E3T-FT11 E3T-SR11 E3T-FD11 E3T-SL11 E3T-SL21
g
PNP E3T-ST13 E3T-FT13 E3T-SR13 E3T-FD13 E3T-SL13 E3T-SL23
Dark-ON NPN E3T-ST12 E3T-FT12 E3T-SR12 E3T-FD12 E3T-SL12 E3T-SL22
PNP E3T-ST14 E3T-FT14 E3T-SR14 E3T-FD14 E3T-SL14 E3T-SL24
Note:
Set the distance between the Sensor and Reflector to a value larger than the one indicated in parentheses.
Accessories (Order Separately)
Slits
For
E3T
-ST1j
Slit
width Sensing
distance
(typical)
Minimum
sensing ob
-
ject
(typical)
Model Remarks
0.5 dia.
100 mm
0.5 dia.
E39-S63
One each for
Emitter and
Receiver;
common with
1 dia.
300 mm
1 dia.
common w
ith
Slit widths of
1 dia. and
0.5 dia.
For E3T
-FT1j
Slit
width Sensing
distance Minimum
sensing ob
-
ject
(typical)
Model Remarks
0.5 dia.
50 mm
0.5 dia.
E39-S64
One each for
Emitter and
Receiver;
common with
1 dia.
100 mm
1 dia.
common w
ith
Slit widths of
1 dia. and
0.5 dia.
E3T E3T
2
Reflectors
Name
Sensing dis
-
tance Minimum
sensing ob
-
ject (typical)
Model
For
retroreflective
model
200 mm
(10 mm)
(rated value)
(see note 2)
2 dia.
E39-R4
(see note 1)
100 mm
(10 mm)
(see note 2)
E39-R37
Note: 1.
Attached to the E3T
-SR1j
retroreflective model.
2. Set
the distance between the Sensor and Reflector to a
value
larger than the one indicated in parentheses.
Sensitivity Adjustment Unit
For
E3T
-ST1j
Appearance
Sensing dis
-
tance (typical)
Model
300 to 800 mm
E39-E10
Mounting Brackets
Model Appearance Applied
model Remarks
E39-L116 Common
with
the E3T
-Sj.T
wo mounting
brackets are
required for
through-beam
models.
E39-L117
E39-L118
E39-L119
Common with
the E3T
-Fj.
E39-L120
Application Examples
Detection of Lead Frame Rise
(Pressure Machines) Checking of IC Set
(Handler)
E3T-ST1j
E3T-ST1j
E3T-ST1j
Conventional
photoelectric sensor Malfunctions due to the light
reflection of the metal surface.
Detection of IC Chips on Tape
(Taping Machines) Detection of Cassette or Magazine
on the Conveyor
Reflector
IC chip
E3T-SR1j
E3T-ST1j
E3T E3T
3
Specifications
Ratings/Characteristics
E3T-jjjj
Item Through-beam Retroreflective Limited
reflective
Diffuse reflec
-
tive
Side-view Flat Side-view Flat
NPN PNP NPN PNP NPN PNP NPN PNP NPN PNP NPN PNP
Light-ON -ST11 -ST13 -FT11 -FT13 -SR11 -SR13 -SL11 -SL13 -SL21 -SL23 -FD11 -FD13
Dark-ON -ST12 -ST14 -FT12 -FT14 -SR12 -SR14 -SL12 -SL14 -SL22 -SL24 -FD12 -FD14
Sensing
distance
1 m (Sensitivity
Adjustment Unit
is available)
500 mm
200 mm (10 mm)
(see note)
(with the E39-R4)
5 to 15 mm
(50 x 50 mm
white paper)
5 to 30 mm
(50 x 50 mm
white paper)
5 to 30 mm
(50 x 50 mm
white paper)
Standard
sensing
object
(white paper)
Opaque, 2 dia. min.
Opaque, 27 dia.
min. ---
Min. sensing
object
(typical)
Opaque, 2 dia. min.
2 dia. (sensing
distance of
100 mm)
0.15 dia. (sensing distance of 10 mm)
Differential
travel ---
2 mm max. 6 mm max. 6 mm max.
Directional
angle
Emitter:
3°
to 10
°
Receiver:
3 to 70
°
Emitter:
3°
to 13
°
Receiver:
3 to 70
°
Emitter: 2
°
to 5
°---
Light source
(wave length)
Red LED (“Pin-point” LED) (
λ
=670 nm)
Power
supply
voltage
12 to 24 VDC
±
10%, ripple (p-p) 10% max.
24
VDC
±10%
Current
consumption
Emitter/Receiver: 12 mA max.
20 mA max.
Control
output
Open collector
, load current: 50 mA max. at 24 VDC, residual voltage: 1 V max.,
operation mode: Light ON or Dark ON (separate models)
Circuit
protection
Protection from reversed power
supply connection and output
short-circuit
Protection from reversed power supply connection, output short-circuit, and
mutual interference
Protection
Protection from reversed power supply connection and output short-circuit
Response
time
1 ms max. each for operation and release
Ambient
illumination
(on Receiver
lens)
Incandescent lamp:
5,000
ȏx max.
Sunlight:
10,000
ȏx max.
Ambient
temperature Operating: –25°
C to 55
°C
Storage: –40°
C to 70
°
C (with no icing or condensation)
Ambient
humidity Operating:
35% to 85%
Storage:
35% to 95% (with no condensation)
Insulation
resistance
20 M
Ω
min. (at 500 VDC)
Dielectric
strength
1,000 V
AC, 50/60 Hz for 1 min
Vibration
resistance
Destruction: 10 to 2,000 Hz, 1.5-mm double amplitude or 300 m/s
2
(approx. 30G) for 0.5 hrs each in X, Y
, and Z
directions
Shock
resistance
Destruction: 1,000 m/s
2
(approx. 100G) 3 times each in X, Y
, and Z directions
Degree of
protection
IEC60529: IP67
Connection
method
Prewired (standard length: 2 m)
Weight (with
packaging)
Approx. 40 g Approx. 20 g
E3T E3T
4
Item
Diffuse reflec
-
tive
Limited reflective
RetroreflectiveThrough-beamItem
FlatSide-viewFlatSide-view
Item
PNPNPNPNPNPNPNPNPNPNPNPNPNPNPNPNPNPN
Light-ON -FD13-FD11-SL23-SL21-SL13-SL11-SR13-SR11-FT13-FT11-ST13-ST11
Dark-ON -FD14-FD12-SL24-SL22-SL14-SL12-SR14-SR12-FT14-FT12-ST14-ST12
Materials Case: PBT
Lens and cover: Polycarbonate
Accessories
Phillips-head screws (side-view type: M2 x 14, flat type: M2 x 8), nuts, spring washers, flat washers, instruction sheet,
and Reflector (for retroreflective model only)
Note:
Set the distance between the Sensor and Reflector to a value larger than the one indicated in parentheses.
Engineering Data
Excess Gain vs. Set Distance (Typical)
E3T-ST1j
(Through-beam)
E3T-SR1j
with E39-R4 (Retroreflective)
E3T-SL1j
(Limited Reflective)
Set distance (mm) Set distance (mm)
Set distance (mm)
White paper
Black paper
Excess gain ratio
Excess gain ratio
E3T-FT1j
(Through-beam)
E3T-SL2j
(Limited Reflective)
E3T-FD1j
(Diffuse Reflective)
White paper
Black paper
White paper
Black paper
Excess gain ratio
Set distance (mm)
Excess gain ratio
Excess gain ratio
Set distance (mm)
Set distance (mm)
Excess gain ratio
2000160012008004000
Operation
level
Operation
level
Operation
level
Operation
level
Operation
level
E3T E3T
5
Parallel Operating Range (Typical)
(Through-beam)
E3T-ST1j with Slit E3T-ST1j
with Slit (Enlarged graph)
Distance
X (mm)
1-dia. Slit
Distance Y
(mm)
Distance Y
(mm)
0.5-dia. Slit
E3T-FT1j with Slit E3T-FT1j
with Slit (Enlarged graph)
Distance
X (mm)
0.5-dia.
Slit 1-dia. Slit
Without Slit
Distance X (mm)
1-dia. Slit
0.5-dia. Slit
Distance X (mm) Distance X (mm)
1-dia. Slit
0.5-dia. Slit
Without Slit
400 800 1,200 1,600 2,000
400 800600200 1,000
(Retroreflective)
E3T-SR1j
with E39-R4
Distance Y
(mm)
Distance Y
(mm)
Distance Y
(mm)
Angle Characteristics (Typical)
E3T-SL1j
(Up
and Down)
E3T-SL1j
(Left and Right)
Close-distance Sensing
Capability (Typical)
E3T-SL1j,
E3T
-SL2j
, E3T
-FD1j
Angle
θ
(
°)
Sensing distance change rate (%)
Sensing distance (mm)
Sensing distance change rate (%)
Angle θ (°)
Sensing object:
100 x 100 mm white paper Sensing object:
100 x 100 mm white paper
E3T-SL1jE3T-SL2jE3T-FD1j
j White paper
J Black paper
Sensing Object Size vs. Sensing Distance (Typical)
E3T-SL1j
Sensing distance (mm)
Min. sensing object dia. (mm)
E3T-FD1j,
E3T-SL2j
E3T-SL2j
E3T-FD1j
Sensing distance (mm)
Min. sensing object dia. (mm)
Sensing object:
Pin-gauge, stainless steel
E3T E3T
6
E3T-SL1j
(Limited Reflective)
Sensing distance X (mm)
Operating position Y
(mm)
E3T-SL2j
(Limited Reflective)
Operation Range (Typical)
E3T-FD1j
(Diffuse Reflective)
Sensing
distance
X (mm)
Sensing
distance
X (mm)
Operating position Y
(mm)
Operating position Y
(mm)
Sensing object:
50 x 50 mm white paper Sensing object:
50 x 50 mm white paper
Sensing object:
50 x 50 mm white paper
Sensing Distance Characteristics of Sensitivity Adjustment Unit
(when completing optical axis adjustment)
E3T-SL1j
with E39-E10
Sensitivity adjustment level
Sensing distance (m)
E3T E3T
7
Operation
Output Circuits
NPN Output Configuration
Model E3T-jjj1 E3T-jjj2
State of output
transistor
Light ON
Dark ON
T
iming chart
Operation
indicator
(orange)
Light received
Light not received
ON
OFF
Output
transistor ON
OFF
Load
(relay) Operate
Release
(Between brown and black)
Operation
indicator
(orange)
Light received
Light not received
ON
OFF
Output
transistor ON
OFF
Load
(relay) Operate
Release
(Between brown and black)
Output
circuit
Operation
indicator
(orange)
Stability
indicator
(green)
Photo-
electric
Sensor
main
circuit
Brown
Black
Blue
12 to 24 VDC
50 mA
max. Load
(relay)
0 V
Receiver
(Through-beam Models),
Retroreflective, Dif
fuse Reflective, and Limited Reflective Models
Brown
Blue
12 to 24 VDC
Photo-
electric
Sensor
main
circuit
Emitter
(Through-beam
Models)
E3T E3T
8
PNP Output Configuration
Model E3T-jjj3 E3T-jjj4
State of output
transistor
Light ON
Dark ON
T
iming chart
Operation
indicator
(orange)
Light received
Light not received
ON
OFF
Output
transistor ON
OFF
Load
(relay) Operate
Release
(Between brown and black)
Operation
indicator
(orange)
Light received
Light not received
ON
OFF
Output
transistor ON
OFF
Load
(relay) Operate
Release
(Between brown and black)
Output
circuit
Operation
indicator
(orange)
Stability
indicator
(green)
Photo-
electric
Sensor
main
circuit
Brown
Black
Blue
12 to 24 VDC
50 mA
max.
Receiver
(Through-beam Models),
Retroreflective, Dif
fuse Reflective, and Limited Reflective Models
Brown
Blue
12 to 24 VDC
Photo-
electric
Sensor
main
circuit
Emitter
(Through-beam
Models)
Load
(relay)
E3T E3T
9
Dimensions
Note:
All units are in millimeters unless otherwise indicated.
Photoelectric Sensors
Through-beam Models (Side-view Type)
E3T-ST1j (Emitter)
(Receiver)
Lens
(1.7 dia.)
Emitter
Two, 2.2 dia. Mounting
Holes
Two, M2
Mounting
Holes
Two, M2
Lens
(2 dia.)
Operation
indicator Stability
indicator
Receiver
Two, 2.2 dia.
Polyvinyl chloride-covered cord,
2.4-mm dia. (7/0.127 dia.), 3 cores
Standard length: 2 m
Polyvinyl chloride-covered cord,
2.4-mm dia. (7/0.127 dia.), 2 cores
Standard length: 2 m
Retroreflective Models (Side-view Type)
E3T-SR1j
Lens
(2 dia.)
Emitter and
Receiver
Two, 2.2 dia. Mounting
Holes
Two, M2
Operation
indicator Stability
indicator
Polyvinyl chloride-covered cord,
2.4-mm dia. (7/0.127 dia.), 3 cores
Standard length: 2 m
E3T E3T
10
Limited Reflective Models (Side-view Type)
E3T-SL1j
E3T-SL2j
Lens
(3.7
×
2)
Receiver
Two, 2.2 dia. Mounting
Holes
Two, M2
Operation
indicator Stability
indicator
Lens (4.4 ×
2)
Emitter
Polyvinyl chloride-covered cord,
2.4-mm dia. (7/0.127 dia.), 3 cores
Standard length: 2 m
Through-beam Models (Flat Type)
E3T-FT1j
(Emitter,
Receiver)
Two, M2
Two, 2.2 dia.
Optical axis
Two, R2 Mounting
Holes
Operation indicator
(see note) Stability indicator
(see note)
Lens (1.3 dia.)
Polyvinyl chloride-covered cord,
2.4-mm dia. (7/0.127 dia.), 3 cores
Standard length: 2 m
Note: For E3T-FT11/-FT13 and E3T-FT12/-FT14 Receivers only.
Diffuse Reflective Models (Flat Type)
E3T-FD1j
Two, M2
Emitter
Optical axis
Two, 2.2 dia.
0.2
Lens (1.5 dia.)
Receiver
Mounting
Holes
Operation
indicator Stability
indicator
Lens (3.1 dia.)
Polyvinyl chloride-covered cord,
2.4-mm dia. (7/0.127 dia.), 3 cores
Standard length: 2 m
Two, R2
1.75
E3T E3T
11
Accessories
Reflector (Attached to Retroreflective Models)
E39-R4
Two, 2.2 dia.
Material
Surface: Acrylic
Back: ABS
E39-R37
Note: A
reflector and a
stainless steel mounting
plate
are supplied together as a set.
Two, 3.1 dia.
Acrylic
resin on
reflecting
surface
Reflector
t* 0.6
(with adhesive)
Stainless steel
mounting plate
(t* 0.5)
Mounting
Plate
Reflector
Slits (Order Separately)
Two, 2.2 dia.
Through-beam
E3T
-ST1j
with E39-S63
W
ith Slit mounted
Notch
Note: Align the notch direc-
tion of the Slit when
installing
on the
Emitter
and Receiver.
1.0±0.05 dia.
0.5±0.05 dia.
E39-S64
(for Through-beam E3T
-FT1j
)
W
ith Slit mounted
1 dia.
0.5 dia.
12.6 2.7
2.7
Material: 0.2-mm-thick
stainless
steel
(SUS301)
Material: 0.2-mm-thick
stainless steel
(SUS301)
Sensitivity Adjustment Unit (for E3T-ST1j)
E39-E10
2 dia.
When the Sensitivity Adjustment
Unit is mounted
Optical axis
Adjuster
Material:
Stainless steel (SUS301)
E3T E3T
12
Mounting Brackets for E3T-Sj (Order Separately)
E39-L116
R1.5
max.
Material:
1.2-mm-thick stainless steel (SUS304)
E3T-ST1
1 with E39-L1
16
(Two, R1.7)
(Two, R2)
(Two, R2)
(Two, R1.1)
(Two, R1.2)
(Four, R2) Three, M2 Two, M2 × 14
E39-L117
R1 max.
Material:
1.2-mm-thick stainless steel (SUS304)
E3T-ST1
1 with E39-L1
17
(Two, R1.7) Two, R2 (Two, R2)
(Two, R1.1)
(Four, R2) Three, M2
Two, M2 × 14
(Two, R1.7)
E3T E3T
13
E39-L118
Material:
1.2-mm-thick stainless steel (SUS304)
E3T-ST1
1 with E39-L1
18
(Two, R1.7)
(Four, R2)
(Two, R1.1)
(Four, R2) Three, M2 Two, M2 × 14
Mounting Brackets for E3T-FT1j/E3T-FD1j
E39-L119
E39-L120
Two,
M2
×
8
E3T-FT11
with E39-L1
19
Four, M2 tapping holes
Two, M2 ×
8
E3T-FT11
with E39-L120
Four, M2 tapping holes
Material:
1.2-mm-thick stainless steel (SUS304)
Material: 1.2-mm-thick stainless steel (SUS304)
E3T E3T
14
Precautions
Caution
Do
not
apply AC power to the E3T
, otherwise the E3T may be
damaged.
Do
not impose any voltage exceeding the
rated voltage on the E3T
,
otherwise
the E3T may be damaged.
Do not short-circuit the load connected to the E3T, otherwise the
E3T
may be damaged.
When
supplying power to the E3T
, make sure that the polarity of the
power
is correct, otherwise the E3T may be damaged.
Correct Use
Operating
Environment
Do
not install the E3T in the following places. Doing so may cause
the
E3T to malfunction.
Places where the E3T is exposed to direct sunlight.
Places with high humidity and where
condensation may result.
Places with corrosive gas
Places with vibration or shock af
fecting the E3T
High-tension Lines
The power supply lines of the Photoelectric Sensor must not be
wired
alongside power lines
or high-tension lines in the same con
-
duit,
otherwise the Photoelectric Sensor may become damaged
or
malfunction due to induction noise that may be generated from the
power
lines or high-tension lines.
Cord
The
cord can be extended up to 100 m provided that the thickness of
the
cord is 0.3 mm
2
maximum.
Power Supplies
Be
sure to ground the FG (frame ground) and G (ground) terminals if
a switching regulator is connected to the E3T, otherwise the E3T
may
malfunction due to the switching noise of the switching regula
-
tor.
Water
Resistivity
Do not use the E3T underwater
, outdoors, or in the rain.
Load short-circuit protection
The
E3T incorporates a load short-circuit protection function. If the
load
short-circuits, the output of the E3T will be
turned OFF
. Then,
recheck
the wiring and turn on the E3T again to reset the load short-
circuit
protection function. The load short-circuit protection
function
will work if there is a current flow that is 2.4 times larger than the
rated
load current. When using an inductance load, be sure that the
inrush
current will not exceed 2.4 times larger than the rated current.
Cleaning
Paint
thinner will damage
the casing of the E3T
. Do not apply paint
thinner
when cleaning the E3T
.
Others
When mounting the E3T, do not strike the E3T with a hammer.
Otherwise, the E3T will lose its watertight properties. Use M2
screws
and washers to mount the E3T
.
Indicators
The following graphs indicate the status of each operation level.
Be sure to use the E3T within the stable operating range.
Stable
operation
range
Unstable
operation
range
Stable
operation
range
Operation
level
x 1.2
Operation
level
Operation
level x 0.8
Stability
indicator
(green)
Operation indicator (orange)
E3T-jjj1
E3T-jjj3E3T-jjj2
E3T-jjj4
ON
OFF
ON
ON
OFF
OFF
ON
Light
Note: If the E3T’s operation level is set to the stable operation
range,
the E3T will be in
most reliable operation without be
-
ing
influenced by temperature change, voltage
fluctuation,
dust,
or setting change. If the operation level cannot be set
to
the stable operation range, pay attention to environmen
-
tal
changes while operating the E3T
.
Use of E39-E10 Sensitivity Adjustment Unit
(Dark ON: E3T-ST12/ST14)
(At Min.)
(At Center)
(At Max.) Indicator
Adjuster
1.
Mount the Unit on the Receiver
.
2. Set the adjuster of the Sensitivity Adjustment Unit to Max.
(Before
shipping: Max.)
3. After mounting on the Sensor, adjust the optical axis and
secure
the Sensor
.
4. Place a workpiece between the Emitter and Receiver and
gradually
turn the adjuster counterclockwise toward the Min.
side. Stop turning the adjuster when the operation indicator
and
stability indicator (green) turn ON.
5. Remove the workpiece and confirm that the operation
indicator
is OFF and the stability indicator (green) is ON.
This
completes
the adjustment.
Note: If the light attenuation rate due to a workpiece is 40% or
less, the stability indicator will not turn ON whether or not
light
is received. When the variation of
light is small such as
when
sensing semi-transparent workpieces, carefully
per
-
form
preliminary testing.
Turning ON Power Supply
The E3T will become ready for sensing 100 ms after the power is
turned ON.
If the E3T is connected to a power source different from one for
loads,
be sure to turn ON the power supply to the E3T first.
!
E3T E3T
15
E3T E3T
16
OMRON Corporation
Industrial Sensors Division
Sensing Devices and Components Division H.Q.
28th Fl., Crystal T
ower Bldg.
1-2-27, Shiromi, Chuo-ku,
Osaka 540-6028 Japan
Phone: (81)6-949-6012 Fax: (81)6-949-6021
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To
convert millimeters into inches, multiply by 0.03937. T
o convert grams into ounces, multiply by 0.03527.
Cat. No. E262-E1-3 In the interest of product improvement, specifications are subject to change without notice.
Printed
in Japan
0398-2M (0497)
a
