A-158
Standard Photoelectric Sensors
Application
Features
We significantly increased the S/N ratio to enable a stable detection of PET bottles and vari-
ous other transparent containers
Narrow pin interval detection
Stable detection of 5 mm gaps that are not
detectable by previous regression reflection
models.
Wide detection range. Stable detection
even at long distances.
Use of hyper-point LED as light source
(1/2 light emission diameter of previous models)
enables stable long-distance detection.
1m
Stable detection of ampules and
other small containers.
Visible spotlight for easy adjustment.
NG
NG
Chattering
A state without a transparent bottle
Reflector
Corner cube
Emission beam width
All the reflected light is received.
Emission element
Polarized filter
Pin hole
Sensor
Received
element
Received
element
Reflection beam width
Light is certainly intercepted by the transparent bottle.
Reflector
Transparent Glass Bottles
Refraction of the lens effect of a bottle
Polarized filter
Pin hole
Sensor
Emission element
Adoption of the coaxial retroreflective model
Stable detection can be carried out also to the transparent bottle of various form and surface states.
Using E39-R6 (The characteristic in a short distance)
(Example)
Clear glass sensor E3S-CR62/67
Problem 1
Using E39-R1 (The characteristic in a long distance)
100
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.8
S
/
N
1.6
S
/
N
150
200
250
Distance
(mm)
E3S-CR62/67
Conventional model
200
400
600
800
1000
Distance (mm)
Conventional model
E3S-CR62/67
A part of emitted light is received.
The increase light by
a transparent bottle
Reflector
Transparent
Glass Bottles
The increase light by refraction of
the lens effect of a bottle
Sensor
Incorrect
operation
A state without
a transparent bottle
Reflector
Emission beam width
Received light
Received element
Sensor
Emission
element
Received element
Emission
element
Reflection beam width
The Chattering by
the angle of a bottle
Problem 2
F502-EN2-04.book Seite 158 Dienstag, 26. Juli 2005 5:48 17
