5-28 Photoelectric Sensors
5PHOTOELECTRIC
SENSORS
Comet Series
Sensing Modes
Thru-Beam
This sensing mode is available with
ranges of 20 and 80 feet (6 and 24m).
The 20 foot (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 fea-
ture 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 2-wire, 3-wire and
4-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 retrore-
flector 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 visi-
ble sensing beam for easy installa-
tion and alignment.
Diffuse Reflective, Focused Diffuse
and Wide Angle Diffuse
A wide variety of diffuse reflective
models are available with ranges
of 8 inches (200 mm) and 24 inches
(610 mm). Forward and right-angle
viewing configurations offer identical
optical performance in this series.
Focused diffuse reflective models fea-
ture a light beam that is focused at a
point 1.6 inches (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 varia-
tions in color, reflectance, contrast
or surface shape, while ignoring
objects that are just slightly outside
the target range. This gives the Per-
fect 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, 2-, 3- or 4-wire circuits,
cable, micro or mini-connector ter-
minations and a variety of sensing
ranges. A visible sensing beam on
most models lets you quickly con-
firm that the sensor is aligned cor-
rectly with the target. Fine spot
models provide an extremely small
0.05 inch (1.3 mm) light spot for
accurately detecting tiny targets
such as fine strands of wire or tar-
gets that are in or behind small
diameter holes.
Fiber Optic
The Comet Series also includes sen-
sors 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 patented glass fiber optic
adapter that inexpensively converts
our standard diffuse reflective sen-
sors 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 inch (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.
See Page 5-38 at the back of this
section, and Section 8 for a full list of
mounting brackets compatible with
the Comet Series.
Mounting
sensor
using
jam nuts.
Mounting
sensor using
#4 hardware.