Cut Sheet

V8-T5-4 Volume 8—Sensing Solutions CA08100010E—July 2015 www.eaton.com
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Photoelectric Sensors
Introduction
Technical Reference
Photoelectric Sensors
Introduction
Photoelectric sensors use light to detect the presence or absence of an object. The main
advantages of photoelectric sensors are noncontact sensing of objects and greatly extended
sensing ranges.
Choosing the Right Sensor
There are many factors to
consider when choosing a
photoelectric sensor. The
specific demands of your
application will dictate the
sensor required for the job.
Some of the questions you
should consider, and
suggested areas to find more
information:
●
What range is required
(how far is the sensor from
the object to be detected)?
(See “Modes of Detection”,
“Range” and “Excess
Gain”)
●
What is the nature of the
environment? (See
“Contamination”)
●
What access do you have
to both sides of the object
to be detected (is wiring
possible on one or both
sides of the object)? (See
“Modes of Detection”)
●
What size is the object
being detected? (See
“Modes of Detection”)
●
Is the object consistent in
size, shape, and
reflectivity? (See “Modes
of Detection, Perfect
Prox”)
●
What are the mechanical
and electrical
requirements? (Check the
electrical specifications of
the desired sensor)
●
What kind of output do you
need? (Check the electrical
specifications of the
desired sensor)
●
Are logic functions needed
at the sensing point? (If so,
look for sensors with logic
modules or built-in logic
functions)