1
E4C Ultrasonic Proximity Sensor
Compact, Cylindrical Ultrasonic
Proximity Sensor with Separate
Amplifier Unit
■Stable operation for a variety of objects regardless
of color, transparency, or material (metallic or non-
metallic).
■Compact M18-sized cylindrical head.
■Prevent mutual interference using a synchroniza-
tion selector.
■With reflective models, setting sensing zones
ensures detection without influence by the back-
ground.
Ordering Information
Sensors (Refer to Dimensions on page 7.)
Amplifier Units
(Refer to Dimensions on page 7.
)
Application Examples
Detection of transparent bottles and containers Detection of milk packages
Model Model
12 to 24 VDC
12 to 24 VDC
E4C-WH4T
E4C-WH4L
E4C-TS50
E4C-LS35
50 cm
10 to 35 cm
Sensing method Sensing distance
Through-beam
Reflective
(convergent reflective)
Supply voltage
2
E4CE4C
Specifications
■Ratings/Characteristics
Sensors
Note: 1. This is the half-value angle obtainable with a signal of -6 dB.
2. The enclosure rating indicates the degree of protection of the case, which will depend on the operating condition.
Amplifier Units
Note: The response frequencies are values obtained with the E4C used for detecting the rotating propeller-shaped disc as shown on the
right.
Model E4C-TS50 E4C-LS35
Item Sensing method Through-beam Reflective
Sensing distance 50 cm 10 to 35 cm (possible to limit the sensing zone
within a range between 2 and 25 cm)
Standard sensing object 10 x 10 cm flat plate 4 x 4 cm flat plate
Ultrasonic oscillation frequency Approx. 270 kHz
Response frequency 50 Hz 20 Hz
Directional angle (see note 1) ±8° max.
Indicator SENSING indicator (red LED)
Ambient temperature Operating: –10°C to 55°C (with no icing)
Ambient humidity Operating: 35 to 95%
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 2) IEC IP66
Cord length 2 m
Weight Approx. 300 g (with Emitter and Receiver) Approx. 150 g
Material Case Heat-resistant ABS resin
Oscillator Ceramic
Nut Polyacetal resin
Model E4C-WH4T E4C-WH4L
Item Sensing method Through-beam Reflective
Sensing distance 50 cm 10 to 35 cm
Supply voltage
(operating voltage range)
12 to 24 VDC ±10% with a max. ripple ±10% (p-p)
Current consumption 100 mA max. at 12 VDC
Differential travel --- 20% max. of rated sensing distance
Response frequency (see note) 50 Hz 20 Hz
Control output
(residual voltage)
Terminal output: 100 mA max. (NPN or PNP open collector output at 40 VDC with a residual voltage
of 2 V)
Connector output: 50 mA max. (photocoupler output)
Operation mode Normally open or normally closed (selectable with a slide switch)
Ultrasonic compensation Yes
Indicator SENSING indicator (red LED) and STABILITY indicator (green LED)
Ambient temperature Operating: –10°C to 55°C (with no icing)
Ambient humidity Operating: 35 to 95%
Temperature influence ±30% max. of sensing distance at 20°C in the
temperature range of –10°C and 55°C
±10% max. of sensing distance at 20°C in the
temperature range of –10°C and 55°C
Voltage influence
±
10% max. of sensing distance at a voltage between 90% and 110% of the rated power supply voltage
Insulation resistance 20 MΩ min. (at 500 VDC) between current carry parts and case
Dielectric strength 1,000 VAC (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 IEC IP40
Weight Approx. 110 g
Materials Case: ABS
3
E4CE4C
Engineering Data
Space:blade = 1:1
Sensing Range (Typical)
E4C-LS35
Sensing distance X (cm)
Parallel Movement
Characteristics (Typical)
E4C-TS50
Operating distance Y (cm)
Power supply voltage: 12 VDC
Sensitivity Adjuster: Max.
Setting distance X (cm)
Operating Distance vs.
Sensing Object Size (Typical)
E4C-LS35
Sensing adjuster: 10
Zone adjuster: 25
Setting distance X (cm)
Standard sensing object (4 x 4 cm flat plate)
Operating range
Operating range
E4C-TS50
Receiver Sensing object (dia. d mm)
Emitter
Object passin
g
position X (cm)
Operating Distance vs.
Sensing Object Angle (Typical)
E4C-LS35
Angle (°)
Operating distance X (cm)
Distance adjuster: 10
Zone adjuster: 25
E4C-TS50+ E4C-WH4T
Ambient temperature (°C)
Operating range
Operating range
Operating range
θ°
Sensing range Y (cm)
Sensing object dia. d (cm)
Variation rate of sensing distance (%)
Sensing object dia. d (cm)
Obtain the point that turns Y1 and Y2 ON
while changing the sensing distance (X).
Sensing object: Column
Dia.: d (cm)
Ambient Temperature vs.
Variation Rate of Sensing
Distance (Typical)
Sensor and Amplifier: Same temperature
variation
Sensitivity adjuster: Max.
Sensitivity adjuster: Max.
E4C-TS50+E4C-WH4T
Sensor: Temperature varied
Amplifier: Constant room temperature
Sensitivity adjuster: Max.
Ambient temperature (°C) Ambient temperature (°C)
E4C-TS50+E4C-WH4T
Sensor: Constant room temperature
Amplifier: Temperature varied
Sensitivity adjuster: Max.
Ambient temperature (°C)
E4C-LS35+E4C-WH4L
Distance adjuster: 10
Zone adjuster: 25
Variation rate of sensing distance (%)
Variation rate of sensing distance (%)
Variation rate of sensing distance (%)
Sensor and Amplifier: Same temperature
variation
4
E4CE4C
■Amplifier Units
Indicators
• STABILITY Indicator (Green)
When this indicator is lit, the ultrasonic input into the Receiver is
sufficient, or its interruption small enough, to ensure the smooth
operation of the E4C. Do not operate the E4C when this indicator
is not lit.
• SENSING Indicator (Red)
When this indicator is lit, the Receiver has ultrasonic input.
Operation Selector (H1/H2)
Incident-ON (H1)
Incident-OFF (H2)
Note: The load in operation is connected to the output circuit of
the E4C.
Asynchronous/Synchronous (MON/SYN) Switch
• If more than one Sensor is used in one place, the Sensors need
to be in synchronous operation for the prevention of mutual inter-
ference. A maximum of four Sensors can be in synchronous op-
eration.
• Connect the DC power supply and Sensor to each Amplifier as
usual.
• Use the E99-C (order separately) connector to connect the Sen-
sor to the Amplifier.
• If the case of the connections shown in the following illustration,
set the selector of only one Amplifier (No. 1 in the following case)
to MON. Set the selector of any other Amplifier to SYN.
Note: The E99-C Connector will be most effective if the E4C is
a reflective model although the E99-C Connector is re-
quired by both the reflective and through-beam models.
When using through-beam models, however, be sure to
maintain enough between adjacent Sensors to suppress
mutual interference. Refer to Sensitivity Adjuster Position
vs. Parallel Movement Characteristics in Engineering Da-
ta.
Ambient temperature (°C)
Ambient temperature (°C)
E4C-LS35+E4C-WH4L E4C-LS35+E4C-WH4L E4C-TS50+E4C-WH-4T
Operating distance Y (cm)
Setting distance X (cm)
Sensitivity adjuster: Center
Sensitivity adjuster: Max.
Sensor: Temperature varied
Amplifier: Constant room temperature
Distance adjuster: 10
Zone adjuster: 25
Sensor: Constant room temperature
Amplifier: Temperature varied
Distance adjuster: 10
Zone adjuster: 25
Variation rate of sensing distance (%)
Variation rate of sensing distance (%)
Sensitivity Adjuster Position
vs. Parallel Movement
Characteristics
Obtain the point that turns Y1 and Y2 ON
while changing the sensing distance (X).
Light incident
Light interrupted
SENSING indicator (red) ON
OFF
Output transistor
(Both PNP and NPN outputs) ON
OFF
Load (e.g., relay) Operate
Release
Light incident
Light interrupted
SENSING indicator (red) ON
OFF
Output transistor
(Both PNP and NPN outputs) ON
OFF
Load (e.g., relay) Operate
Release
E99-C Connector
(order separately)
(see note)
Am
p
lifiers Sensors
(see note) (see note)
5
E4CE4C
■Sensitivity/Zone Adjustments
E4C-TS50 and E4C-WH4T 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 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.
E4C-LS35 and E4C-WH4L Convergent Reflective 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: 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. The sensing distance is adjustable within a range of 10 to 35 cm with the distance adjuster.
3. Adjust the sensing zone within the sensing distance adjustable range (i.e., 10 to 35 cm).
Range in which the STABILITY indicator (green) lit
Optimum line
Range in which the SENSING indicator (red) lit
Step 1 2 3 4
Sensing
Distance adjuster
Zone adjuster
--- ---
Adjustment
procedure
Place the sensing object at
the sensing position and
turn the distance adjuster
clockwise gradually until
both the SENSING and
STABILITY indicators are
lit. (See note 2)
Move the Emitter and Re-
ceiver vertically and hori-
zontally and secure the
Emitter and Receiver at the
midpoint of the range within
which the STABILITY indi-
cator is lit.
Remove the sensing object
and check that the SENS-
ING indicator is OFF and
the STABILITY indicator is
continuously lit.
The sensing zone can be
set within a range of 2 to 25
cm with the zone adjuster.
Background
Sensing object
Background
Sensing object
Background
Sensing object
Background
35 cm
Sensing object
6
E4CE4C
Sensing Zone Setting Example
Note: Make the settings as shown above to set a sensing zone
of 10 cm with a sensing distance adjustment of 15 cm.
Relationship between Incident-ON and Incident-
OFF
Example:
Sensing distance set to 15 cm and zone set to 10 cm
Note: Set the zone within a distance of 10 to 35 cm from the
Sensor. Therefore, if the distance adjuster is set to 30 cm
and zone adjuster is set to 20 cm, the sensing zone will be
5 cm from a point 30 cm away from the Sensor.
Nomenclature
Operation
■Output Circuit
Sensing zone
Sensing distance
adjustment Sensing zone
adjustment
Step 1 2
Distance
adjuster and
zone adjuster
Adjustment
procedure
Set the distance ad-
juster to 15 cm
Set the zone adjuster
to 10 cm.
Incident-ON
Incident-OFF
Stable sensing zone
(adjustable)
(
Outside the ratin
g
s
)
(Outside the ratings)
Sensing distance
adjustment
Sensing zone
adjustment
Unstable
sensing zone Non-sensing
zone
Background object
E4C-WH4T E4C-WH4L
Operation (H1/H2) selector
SENSING indicator
STABILITY indicator Sensitivity adjuster
Operation (H1/H2) selector
SENSING indicator
STABILITY indicator
Zone adjuster
Asynchronous/Syn-
chronous (MON/SYN)
operation selector
Asynchronous/Syn-
chronous (MON/SYN)
operation selector
Distance (sensing
distance) adjuster
100 mA max.
Load
Load
100 mA max.
PNP output
NPN output
12 to 24
V
0 V
E4C
main
circuit
7
E4CE4C
Dimensions
Note: All units are in millimeters unless otherwise indicated.
Sensors
Amplifier Units
E4C-TS50
E4C-LS35
SENSITIVITY indicator
18.5 dia.
8 dia. 9 dia.
11 dia.
(See note)
Mounting Holes
Note: E4C-TS50R or E4C-LS35: 3-conductor, shielded cord (6 dia., UL2791) with 7/0.25 dia. (standard length: 2 m)
E4C-TS50S: 2-conductor, shielded cord (6 dia., UL20276) with 7/0.25 dia. (standard length: 2 m)
E4C-WH4T
Two, M4 screw mounting holesEight, M3.5 terminal screws
Note: DIN track mounting side
(See note)
Two, 4.5 dia.
Mounting Holes
E4C-WH4L
Two, M4 screw mounting holes
Note: DIN track mounting side
(See note)
Two, 4.5 dia.
Mounting Holes
Eight, M3.5 terminal screws
8
E4CE4C
Installation
■Connections
Precautions
■Correct Use
Sensor Mounting Angle
If the E4C 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 E4C 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 E4C by using the nuts provided with the E4C
or the mounting holes of the E4C. Refer to Dimensions for details.
Do not strike the Sensor with any hammer or other object, other-
wise the E4C will no longer be water-resistant.
If the E4C is not mounted securely, the E4C 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 E4C at a temperature exceeding the rated range
or outdoors, otherwise the reliability and life of the E4C will
decrease.
The Ultrasonic Reflective Sensor utilizes the air as a beam trans-
mission media. Do not use the E4C 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 E4C may malfunction.
The jetting sound of air nozzles includes noise of a wide fre-
quency range, which will affect the operation of the E4C. Do not
use an air nozzle near the E4C.
The sensing distance of the E4C will decrease if there is any
water drops on the surface of the emitter or receiver.
The reflective model may not detect any objects if there is any
object absorbing sound, such as powder and cotton, on the sur-
face of the emitter or receiver.
E4C-WH4T E4C-WH4L
12 to 24 VDC
Output 2 (PNP)
100 mA max.,
40 VDC max.
Output 1 (NPN)
100 mA max.,
40 VDC max.
Black
White
Red
Shield
12 to 24 VDC
Output 2 (PNP)
100 mA max.,
40 VDC max.
Output 1 (NPN)
100 mA max.,
40 VDC max.
Black
White
Red
Shield
E4C-LS35
E4C-TS50
Turbulence Air curtain
Emitter
Receiver
9
E4CE4C
Mutual Interference
If more than one Unit is closely mounted together or used in a
narrow space, the mutual interference of the Sensors will result.
To prevent this, set the MON/SYN selector to SYN and check that
no mutual interference results.
Connections
The cord length between the Sensor and Amplifier can be a max-
imum of 20 m provided that the cord is a three-conductor,
shielded cord (6 dia., UL2791) with 7/0.25 dia. If the Emitter is the
E4C-TS50S, however, use a two-conductor, non-shielded cord
(6 dia. UL20276) with 7/0.25 dia.
Do not wire the lines of the E4C along with high-tension or power
lines in the same conduit or close together, otherwise the E4C
may malfunction due to inductive noise.
The power supply lines of the Amplifier can be extended up to
100 m provided that the size of the cord is 0.3 dia. or more.
Others
Be sure not to turn the sensitivity adjuster excessively. If the sen-
sitivity adjuster is turned exceeding the permissible range, no
sensitivity adjustment will be possible again.
Take the measures shown in the following illustrations if multiple
reflection results.
The sensing distance will be, however, reduced to half (i.e., 10 to
17 cm) if the slit is used.
If the sensing zone is set to a small value (i.e., a few centimeters)
on the E4C reflective model, the E4C may require a warming-up
time of 3 minutes or more after the E4C is turned ON.
Urethane rubber or sponge
Wall
5-dia. slit
Wall
10
E4CE4C
11
E4CE4C
E4CE4C
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_3_1_1010
D072-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.
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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.
2010.10
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.
