Cut Sheet

Volume 8—Sensing Solutions CA08100010E—July 2015 www.eaton.com V8-T5-55
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5.5
Photoelectric Sensors
Comet Series Sensors
Product Overview
Product Comparison
Eaton’s cost-effective Prism
Series, OEM Prism and
premium Comet Series all
share the same 18 mm flat-
sided housing. This results in
the largest interchangeable
sensor family available,
allowing you to select from
well over 250 different
models to solve the widest
variety of sensing
applications.
Comparison
Compared to similar-looking
Prism and OEM Prism, the
Comet Series includes the
following advantages:
●
AC/DC two-wire versions
available
●
Light/dark output
configuration
●
Perfect Prox background
rejection technology
Sensing Modes
Thru-Beam
This sensing mode is
available with ranges of
20 and 80 ft (6 and 24m).
The 20 ft (6m) range is
available in forward and
Right Angle viewing, and
can be intermixed in any
combination for the best fit in
your application. Long range
models feature a visible
sensing beam to help simplify
installation and alignment.
Reflex and Polarized Reflex
In reflex sensing, the sensing
beam is reflected from a
retroreflector back to the
sensor. The Comet Series
includes standard and
polarized models with two-
wire, three-wire and four-wire
circuits. Right Angle models
are also available. Polarized
models feature a polarizing
filter built into the sensor to
ensure that only light
reflected from a corner-cube
retroreflector is recognized by
the sensor. This allows
reliable detection of shiny
targets that could reflect light
and be missed by a non-
polarized sensor. Most
models include a visible
sensing beam for easy
installation and alignment.
Diffuse Reflective,
Focused Diffuse and
Wide Angle Diffuse
A wide variety of diffuse
reflective models are
available with ranges of 8 in
(200 mm) and 24 in (610
mm). Forward and Right
Angle viewing configurations
offer identical optical
performance in this series.
Focused diffuse reflective
models feature a light beam
that is focused at a point 1.6
in (40 mm) in front of the
sensor lens for applications
where you need to avoid
sensing objects in front of or
behind the target. Wide angle
diffuse models provide a
large spot and wide detection
area.
Perfect Prox
This is a unique type of
diffuse reflective sensor that
combines extremely high
sensing power (called “excess
gain”) with a sharp optical
cutoff to ignore backgrounds.
This allows the sensor to
reliably detect targets
regardless of variations in
color, reflectance, contrast or
surface shape, while ignoring
objects that are just slightly
outside the target range.
This
gives the Perfect Prox
an
outstanding ability to solve
sensing applications that
would be difficult or
impossible to manage with
other types of sensors. It also
makes Perfect Prox
one of
the easiest photoelectric
sensors to set up and use.
Eaton’s Comet Series includes
more background rejection
models than any other family
on the market. Choose from
forward or Right Angle
viewing, two-, three- or four-
wire circuits, cable, micro or
mini-connector terminations
and a variety of sensing ranges.
A visible sensing beam on
most models lets you quickly
confirm that the sensor is
aligned correctly with the
target. Fine spot models
provide an extremely small
0.05 in (1.3 mm) light spot for
accurately detecting tiny
targets such as fine strands of
wire or targets that are in or
behind small diameter holes.
Fiber Optic
The Comet Series also
includes sensors that utilize
fiber optic cables to sense
objects where space is
restricted, temperatures are
high, or tight viewing angles
are required. Choose from
models that accept low cost
plastic fiber optic cables, or
use our glass fiber optic
adapter that inexpensively
converts our standard diffuse
reflective sensors for use
with durable glass fiber optic
cables.
Mounting
Comet Series sensors feature
a threaded housing and
include two jam nuts and
washers for mounting into any
0.75 in (19 mm) hole or a
selection of accessory
mounting brackets available
from Eaton. The flat sides of
the sensor feature two
mounting holes for easily
attaching the sensor to any
flat surface with #4 hardware.
Mounting Sensor using
#4 Hardware
Mounting Sensor using
a Jam Nut
Note: See Pages V8-T5-62 and
V8-T5-63, and Tab 8 , section 8.2
for a full list of mounting brackets
compatible with the Comet
Series.