1
E4B Ultrasonic Proximity Sensor
Rectangular Ultrasonic Proximity
Sensor with Built-in Amplifier
■Stable operation for a variety of objects regardless
of color, transparency, or material (metallic or non-
metallic).
■Ultrasonic beam expansion of approx. 8°.
Detect small objects of 20 x 20 mm min.
■With reflective models, setting sensing zones
ensures detection without influence by the back-
ground.
Ordering Information
Sensor (Refer to Dimensions on page 8.)
Output configuration Sensing method Sensing distance Model
DC switching
NPN (normally open or
closed selectable)
Through-beam E4B-TS50E4
E4B-T1E4
Reflective Convergent reflective
(Distance adjustable)
E4B-LS20E4
E4B-LS70E4
Convergent reflective
(Zone setting)
E4B-RS70E4
50 cm
100 cm
5 to 20 cm
20 to 70 cm
20 to 70 cm
Sensing zone
2
E4BE4B
■Sensing Method
Note: An object may be detected due to multiple reflection if the object is in the unstable range where the distance adjuster is ineffective,
in which case however, the detection of the object will not be stable. Therefore, do not attempt to use the E4B to detect an object
in the unstable range.
Application Examples
Detection of a variety of transparent bottles in
bottle manufacturing, drink processing, and
food processing lines
Detection of fluorescent lamps
Through-beam
Reflective Convergent reflective distance
Convergent
reflective
zone
Sensing object
passing zone
Convergent
reflective
E4B-T@S Emitter
Sensing object
E4B-T@R Receive
r
Detects the attenuation or interrupted condition
of the ultrasonic beam caused by the object
passing between the Emitter and Receiver.
Unstable range
Distance adjustment
Sensing object
E4B-LS@
Detects only the beam reflected from the
object existing within the sensing distance
range set with the distance adjuster.
Reflector
E4B-RS70
Detects the object with the interruption of the
normal beam reflected from the reflector.
Sensing distance
adjustable range
Sensing object
passing zone
Sensing
object
Unstable range
E4B-RS70
Detects only the beam reflected from the
object existing in the sensing range set with
the distance selector.
Sensing
object
Detects the absence or jamming of bottles
Detects fluorescent lamps with the
Sensor mounted aslant.
3
E4BE4B
Specifications
■Ratings/Characteristics
Note: 1. These are the available sensing distances at an ambient temperature range between 0°C and 45°C.
2. This is the half-value angle obtainable at a signal of –6 dB.
3. The enclosure rating indicates the degree of protection of the case, which will depend on the operating condition.
4. The response frequencies are values obtained with the E4B
used for detecting a rotating propeller-shaped disc as shown
on the right.
Model E4B-TS50E4 E4B-T1E4 E4B-LS20E4 E4B-LS70E4 E4B-RS70E4
Sensing method Through-beam Convergent reflective distance Convergent re-
flective zone
Item
Sensing
distance
50 cm 1 m 5 to 20 cm 20 to 60 cm
(20 to 70 cm)
(see note 1)
20 to 60 cm
(20 to 70 cm)
(see note 1) (in
10-cm divisions)
Supply voltage 12 to 24 VDC ± 10% (10.8 to 26.4 VDC) with a max. ripple ±10% (p-p)
Current con-
sumption
12 VDC Emitter: 155 mA
max.
Receiver: 30 mA
max.
Emitter: 70 mA
max.
Receiver: 30 mA
max.
100 mA max.
24 VDC Emitter: 80 mA
max.
Receiver: 30 mA
max.
Emitter: 50 mA
max.
Receiver: 30 mA
max.
50 mA max.
Standard sensing object 10 x 10 cm flat plate 4 x 4 cm flat plate
Differential travel --- 20% max. of sensing distance 3 cm max.
Directional angle (see note 2) ±8° max.
Ultrasonic oscillation frequency Approx. 200 kHz
Response frequency (see note 4) 50 Hz 10 Hz 50 Hz 20 Hz
Operating mode Incident or interrupted (selectable)
Control output NPN, 100 mA at 30 VDC (with a residual voltage of 1.5 V max.) and an output resistance of 4.7 kΩ
Indicators SENSING indicator (red LED) and STABILITY indicator (green LED)
Ultrasonic speed compensation No Yes
Ambient temperature Operating: –10°C to 55°C
Ambient humidity Operating: 35% to 95%
Temperature influence ±10% max. of sensing distance at 20°C in the temperature range of –10°C and 55°C
Voltage influence ±5% max. of sensing distance at a voltage between 90% and 110% of the rated power supply volt-
age
Residual voltage 1.5 V max. under a load current of 100 mA and a cord length of 2 m
Insulation resistance 20 MΩ min. (at 500 VDC) between current carry parts and case
Dielectric strength 1,000 V (50/60 Hz) for 1 min between current carry 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 (approx. 50G) 3 times each in X, Y, and Z directions.
Degree of protection (see note 3) IEC IP66 (JEM IP66 water resistive)
Weight (with 2-m-long cord and
Mounting Bracket)
Approx. 600 g (with Emitter and Re-
ceiver)
Approx. 300 g
Materials Case: ABS, Oscillator: Ceramic
Space:Blade = 1:1
4
E4BE4B
Engineering Data
Operating Distance vs. Sensing Object Size (Typical)
E4B-TS50E4, E4B-T1E4 E4B-LS20E4 E4B-LS70E4, E4B-RS70E4
Dia. (d) of sensing object or length (W) of one side in cm.
Dia. (d) of sensing object or length (W) of one side in cm.
Sensing position
Sensitivity adjuster: Adjust with stable incident.
Sensitivity adjuster: Adjust with stable incident.
Sensing position X (cm) (from Receiver)
Sensing distance (cm) Operating distance (cm)
Operating Range Diagram (Typical)
E4B-LS20E4 E4B-LS70E4, E4B-RS70E4 E4B-LS70E4, E4B-RS70E4
Sensing distance (cm)
Sensing distance (cm)
55-dia. rod
30-dia. rod
Sensing distance (cm)
Sensing distance (cm)
Sensing object
Distance X
Operating distance X (cm)
E4B-LS70E4, E4B-RS70E4 E4B-T1E4
Ambient temperature (°C)
Operating distance Y (cm)
VR: Max.
VR: Center
VR: Min.
Setting distance X (cm)
E4B-LS70
E4B-RS70
Standard sensing object (40 x 40 flat plate) Angle θ
Sensing object size (cm)
Variation rate of sensing distance (%)
Sample: Round pipe
that is 10 cm long min.
Sample: Round pipe
that is 10 cm long min.
E4B-T1E4:
Sensitivity adjuster
set to Max.
E4B-TS50E4:
Sensitivity adjuster set to Max.
Angle θ (°)
Standard sensing object
(40 x 40 flat plate)
Note: The curve with the sensitivity adjuster
set to maximum indicates the size of
the sensing object.
Note: The sensing method will change
when the sensing distance exceeds
10 cm. As a result, the detectable
diameters will change greatly.
Operating Distance vs. Sensing
Object Angle (Typical)
Stable operating range
Sensitivity Adjuster Position vs.
Parallel Movement Characteristics
Ambient Temperature vs. Variation
Rate of Sensing Distance (Typical)
Note: Obtain the point that
turns Y1 and Y2 ON
while changing the
sensin
g
distance
(
X
)
.
5
E4BE4B
■Adjustments
Indicators
1. STABILITY Indicator (Green)
When this indicator is lit, the ultrasonic input into the Receiver is sufficient, or its interruption is small enough, to ensure the smooth
operation of the E4B. Do not operate the E4B when this indicator is not lit.
2. SENSING Indicator (Red)
When this indicator is lit, the Receiver has ultrasonic input.
Indicator of Through-beam Emitter
1. Incident Indicator
Lit when there is ultrasonic input.
To use this indicator of the Emitter as an SENSING indicator like the indicator on the Receiver, connect the black lead wires of the
Emitter and Receiver together.
Note: Be sure not to make mistakes in polarity when connecting the above wires. In other words, both brown lead wires must connect to
+DCV or 0 V and both blue lead wires must connect to 0 V or +DCV. Otherwise, the indicator of the Emitter will be lit when the
ultrasonic beam is interrupted.
2. Power Indicator
Lit when the E4B is turned ON.
If the above connections are not possible (e.g., the
Receiver and Emitter use different power supplies), this
indicator will be used as a power indicator.
Connections of Black (White) Lead Wire of Emitter
Note: The indicator will not be lit if the above wires are not con-
nected correctly.
Emitter
100 mA max.
Receiver
Load
Black
Blue
Brown
Blue
Brown
Black
+12 to 24 V
0 V
+12 to 24 V
0 V
Power connection example Short-circuited
Brown: +DCV
Blue: 0 V
0 V blue
Brown: 0 V
Blue: DCV
+DCV blue
6
E4BE4B
Beam Axis, Sensitivity, and Distance Adjustments
1. E4B-T1 and E4B-TS50 Through-beam Models
Set the SENSITIVITY adjuster of the Receiver to maximum.
Move the Emitter and Receiver vertically and horizontally until the
SENSING indicator of the Receiver is lit and secure the Emitter
and Receiver at the midpoint of the range within which the STA-
BILITY indicator is lit.
Pass the sensing object through the sensing range and adjust the
sensitivity so that the SENSING indicator turns ON and OFF
according to the presence or absence of the sensing object while
the STABILITY indicator is lit continuously.
If the STABILITY indicator is not lit while the Sensor is in opera-
tion, this may indicate a possible operational error. Check or read-
just the sensitivity.
If the Emitter and Receiver are set at a distance shorter than the
rated sensing distance, reduce the sensitivity to within the range
in which the STABILITY indicator is lit. This will increase the
immunity of the Sensor against noise.
The parallel movement characteristics (i.e., the mutual interfer-
ence distance) and sensing object size vary with the sensitivity
adjustment. Refer to Engineering Data and make the optimum
adjustments.
2. E4B-LS20* and E4B-LS70 Convergent Reflective Distance Model
Locate the Sensor so that both the STABILITY and SENSING indicators will be lit when the sensing object is placed at the sensing posi-
tion, and the STABILITY indicator will be lit and the SENSING indicator will turn OFF when the sensing object is removed.
Note: If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust
the sensitivity.
Note: *E4B-LS20
The sensing distance is adjustable within a range of 10 to
20 cm with the distance adjuster.
Optimum line
Range in which the STABILITY indicator (green) is lit
Range in which the SENSING indicator (red) is lit
Step123
Sensing
Distance
adjuster
--- ---
Adjustment
procedure
Place the sensing object at the sens-
ing position and turn the distance ad-
juster clockwise gradually until both
the SENSING and STABILITY indica-
tors are lit.
Move the Emitter and Receiver verti-
cally and horizontally and secure the
Emitter and Receiver at the midpoint
of the range within which the STABIL-
ITY indicator is lit.
Remove the sensing object and
check that the SENSING indicator is
OFF and the STABILITY indicator is
continuously lit.
Background
Sensing object
Background
Sensing object
Background
Sensing object
Sensing
distance
Position of distance adjuster
5 to 10 cm Set to the position 5-20. The distance
range will be 5 to 23 cm in this case
due to the characteristics of the ultra-
sonic beam.
10 to 20 cm The adjuster can be set freely within
a range of 10 to 20 cm. The object
can be detected within a range of 5 to
10 cm in this case due to multiple ul-
trasonic reflection.
Setting sensing range (cm)
Unstable range
Separate them 30 cm min.
Background
E4B-LS20
Sensing object
7
E4BE4B
3. E4B-RS70 Convergent Reflective Zone
General Use
Locate the Sensor so that both the STABILITY and SENSING indicators will be lit when the sensing object is placed at the sensing position
and the STABILITY indicator will be lit and the SENSING indicator will be off when the sensing object is removed.
Note: 1. If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust
the sensitivity.
2. If the background object is within a distance of 1.5 m from the sensing head, the SENSING indicator may be lit and the STABIL-
ITY indicator may not be lit in spite of the absence of the sensing object. In such a case, give priority to the adjustment of the
indicators with the sensing object located at the sensing position.
Retroreflective Use
The retroreflective model assures the stable detection of objects
under irregular and unstable reflection conditions (e.g., if the
sensing objects are different in surface or size, if they are passed
through diagonally, or if they are warped or move in a wave-like
way).
The Reflector must be at least 4 x 4 cm in size and made of a
material that is efficiently reflective (such as a metal plate). The
E39-R1 for photomicrosensors is ideal.
Be sure that the reflector is not set within the sensing range.
Set the distance selector to the desired position, fix the reflector
around the midpoint of the set sensing range, and check that both
the SENSING and STABILITY indicators are lit.
Step123
Sensing
Distance selector --- ---
Adjustment
procedure
Place the sensing object at the sens-
ing position and turn the distance se-
lector clockwise gradually until both
the SENSING and STABILITY indica-
tors are lit.
Move the Emitter and Receiver verti-
cally and horizontally and secure the
Emitter and Receiver at the midpoint
of the range within which the STABIL-
ITY indicator is lit.
Remove the sensing object and
check that the SENSING indicator is
OFF and the STABILITY indicator is
continuously lit.
Background
Sensing object
Background
Sensing object
Background
Sensing object
Reflecto
r
Sensing range (20 to 55 cm)
l: Near the midpoint of the sensing range (e.g., 45, 55, or 65 cm)
E4B-RS70
Step123
Sensing
Distance selector --- ---
Adjustment
procedure
Set the distance selector to the de-
sired zone position, mount the Reflec-
tor at or near the midpoint of the set
zone, and confirm that both the STA-
BILITY and SENSING indicators are
lit.
Move the Emitter and Receiver verti-
cally and horizontally and secure the
Emitter and Receiver at the midpoint
of the range within which the STABIL-
ITY indicator is lit.
Remove the sensing object and
check that the SENSING indicator is
OFF and the STABILITY indicator is
continuously lit.
Reflector
Set zone
Reflecto
r
Reflector
Sensing object
8
E4BE4B
Note: 1. If the STABILITY indicator is not lit while the Sensor is in operation, this indicates a possible operational error. Check or readjust
the sensitivity.
2. If the sensing object is in position A parallel to the Reflector as shown above, the SENSING indicator may be lit and the STA-
BILITY indicator may not be lit depending on the position of the sensing object. In such a case, give priority to the adjustment of
the STABILITY indicator when the beam is incident by means of the reflector.
Operation
■Output Circuits
NPN Models Switching DC
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Note: 1. 100 mA max. (load current)
2. Required when the transistor circuit is connected.
Load (relay)
Brown
Black
Blue
Light incident
Light interrupted
ON
OFF
Operate
Release (Brown ↔ Black)
(Blue ↔ Black)
Load (relay)
Light incident
Light interrupted
ON
OFF
Operate
Release
(Brown ↔ Black)
(Blue ↔ Black)
Load
0 V
+ V
Proximity
Sensor
main cir-
cuit
Incident
(Power supply polarity:
Brown: +; Blue: 0 V)
Interrupted
(Power supply polarity:
Brown: 0 V: Blue: +)
STABILITY
indicator (red)
Output
transistor
Output voltage
(logic)
Output voltage
(logic)
STABILITY
indicator (red)
Output
transistor
E4B-TS50
E4B-T1
E4B-LS20
E4B-LS70
E4B-RS70
Two, M4 x 45
4.5 dia.
(See note)
Note: Vinyl-insulated round cord with
three conductors, 6 dia.; standard
length: 2 m
9
E4BE4B
Precautions
■Correct Use
Sensor Mounting Angle
If the E4B is in level control or distance control of sensing objects,
the stability of signal detection will depend on the sensing surface
condition of the objects. Considering the repose angle of the
objects, mount the E4B so that the ultrasonic beam and the sens-
ing surface of each object meet at right angles to each other.
Surrounding Objects
Make sure that the Sensor is free from surrounding objects that
reflect the ultrasonic beam diffusion, otherwise the Sensor may
malfunction. In particular, pay the utmost attention so that no side
lobe of the ultrasonic beam will be reflected by such objects.
Mounting
Securely mount the E4B by using the nuts provided with the E4B
or the mounting holes of the E4B. Refer to Dimensions for details.
Do not strike the Sensor with any hammer or other object, other-
wise the E4B will no longer be water-resistant.
If the E4B is not mounted securely, the E4B may be damaged by
vibration or may not detect sensing objects accurately due to a
possible change in the mounting position.
Environmental Conditions
Do not use the E4B at a temperature exceeding the rated range
or outdoors, otherwise the reliability and life of the E4B will
decrease.
The Ultrasonic Reflective Sensor utilizes the air as a beam trans-
mission media. Do not use the E4B in places with radical convec-
tion or extreme local temperature changes. For example, if there
is a hot air curtain that causes turbulence within the sensing area,
the E4B may malfunction.
The jetting sound of air nozzles includes noise of a wide fre-
quency range, which will affect the operation of the E4B. Do not
use an air nozzle near the E4B.
The sensing distance of the E4B will decrease if there is any
water drops on the surface of the emitter or receiver.
The through-beam model may not detect any objects if there is
any object absorbing sound, such as powder and cotton, on the
surface of the emitter or receiver.
Turbulence Air curtain
Emitter
Receiver
10
E4BE4B
11
E4BE4B
E4BE4B
In the interest of product improvement, specifications are subject to change without notice.
ALL DIMENSIONS SHOWN ARE IN MILLIMETERS.
To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527.
CSM_2_1_0310
D065-E1
OMRON Corporation
Industrial Automation Company
Sensing Devices Division H.Q.
Application Sensors Division
Shiokoji Horikawa, Shimogyo-ku,
Kyoto, 600-8530 Japan
Tel: (81)75-344-7068/Fax: (81)75-344-7107
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.
2010.8
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 2010 All Right Reserved.
