PHOTO ELECTRIC SWITCHES
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Photoelectric Switches
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| These
are based on Modulated infrared beam principle used in non-contact
switching. It can detect non-metallic, plastic, paper, transparent
as well as opaque objects. |
Common
Specifications |
Supply
- 10 to 30 VDC in case of sensors.
Output -
NPN or PNP type in case of sensors.
For 230
VAC operations power pack relay unit is required and output is
available through potential free relay contacts. |
Thru
Beam Sensors / Switches |
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These
are widly known as Through Beam Sensors consisting of Transmitter
and Receiver. They are mainly used to monitor position of the
object.
Sensors
have built-in
amplifier working on 5-30V DC supply. Unit consists of seperate transmitter and receiver in separate housing and placed across
where object is to be sensed. The advantage in case of
switches is amplifier is in separate box and sensor can be
miniatursed as per the requirement. built-in
amplifier working on DC supply. The advantage in case of
switches is amplifier is in separate box and sensor can be
miniatursed as per the requirement.
Sensing
Range available - 200 mm to 100 meters. |
Retroreflective
Sensors/Switches |
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|
These
are infrared switches used to detect edge or edge guiding limit
switching etc applications.
Unit
consists of transmitter and receiver in same housing and beam is
reflected via reflector from transmitter to receiver. Any object
passing through this arrangement can be detected. Sensors have
built-in amplifier working on DC supply.
Sensing
Range available - 200 mm to 10 meters. |
Diffused
Scan Switches |
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|
Unit
consists of transmitter and receiver in same housing and when
object comes in to proximity, beam is diverted from
transmitter to receiver.
Basic
advantage of this sensing method is one side wiring.
Sensing
range available - 100mm to 1.5 meters. Optionally can be supplied
with 4 pin connector. |
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APPLICATIONS |
• Cap/Label
Sensing on bottles during process.
• OD/ID sensing at
unwinder/rewinder.
• Paper/Film
break sensor Transparent/Opaque.
•
Label sensing Online Double Sheet detection.
• Online detection of sizes on conveyor systems.
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Hopper level control for free flowing material.
• Positioning of objects on conveyor.
•
Anti crane collision for overhead cranes.
• Electronic safety guard for human safety.
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Automatic door opening closing.
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Empty running or jamming of material on conveyor.
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Registration mark sensing for packing machines.
• Transparent Glass Bottles/ Ampules/ Object
counting.
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Loop control system web edge guide control. |
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