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Volume 8—Sensing Solutions CA08100010E—July 2015 www.eaton.com V8-T5-85

5.8

Photoelectric Sensors

E58 Harsh Duty Series Sensors

Product Overview

E58 Harsh Duty Series Sensors

Physical Attributes

Rugged physical

construction

The E58 Harsh Duty Series

was designed from the

ground up to be the most

rugged sensor family

available. The strong metal

housing, mechanical seals

and surface mount

electronics withstand heavy

shock and vibration. The

tempered glass lens cover

provides protection in

abrasive environments, and

the sturdy cable is physically

clamped to the sensor body.

Exceptional environmental

protection and chemical

resistance

The E58 Harsh Duty Series

was designed to be used

in the automotive, food

processing and forest

products industries. It is also

well suited for applications in

related industries such as

pulp and paper, car wash and

steel. These industries are all

physically demanding on

equipment and that’s why we

designed and tested these

sensors to extreme levels of

shock and vibration.

Many sensor failures,

however, are actually due to

chemical attack so we had to

make them stand up to

constant chemical

exposure—day in and day

out. To ensure resistance to

the widest possible range of

chemicals, we conducted

extensive studies of the

chemical agents commonly

used in these industries.

We then selected only those

materials that could

withstand exposure to these

chemicals without failure in

the design of the E58 Harsh

Duty Series. In addition, we

eliminated adhesives in favor

of more reliable Viton

compression seals. Some of

the more common chemicals

against which this sensor has

been tested are listed in the

resistance chart.

This resistance chart reflects

testing of the 303 stainless

steel body used on the

standard E58 Harsh Duty

Series sensors. Additional

chemical resistance for food

industry applications is

available using sensors with

the optional 316 stainless

steel body and hard-coated

polycarbonate (or acrylic on

reflex models) lens cover.

The E58 Harsh Duty Series

was designed to resist the

chemicals shown in this table

under normal use and

conditions. Extremes of

environmental factors such

as temperature, pressure,

concentration, duration of

exposure, ultraviolet sunlight

and chemical interactions

combined with the presence

of these chemicals could

result in premature material

failure. For these cases,

testing the sensor in the

specific application is

recommended.

E58 Harsh Duty Series

Sensors Chemical

Resistance Chart

Sensing Modes

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 just slightly outside the

target range. With Perfect

Prox, the E58 Harsh Duty

Series can act just like an

inductive prox sensor—but

with up to 20 times the range

for mounting away from a

moving target so you can

avoid damage and downtime.

18 mm and 30 mm sizes, two-,

three- and four-wire circuits,

and cable, micro- and mini-

connector terminations mean

quick and easy replacement of

damaged proximity sensors. A

visible sensing beam lets you

quickly confirm the sensor is

aligned correctly in the

application.

The 18 mm Perfect Prox has

a sensing range of 2 or 4 in

(50 or 100 mm), and the

30 mm version has a range of

6 or 11 in (150 or 280 mm).

This simplified application

example shows the power

of the Perfect Prox.

Application Example

If the hole is present in the

gear, the sensor will shine

through the hole and ignore

the belt—no detection event

will occur.

If the hole in the gear is

missing, the sensor will

detect the surface of the gear

and reject the part.

Thru-Beam

This sensing mode is

available in the 30 mm

models. Rated sensing range

is 800 ft, among the longest

ranges available on the

market. This provides

extremely high excess gain

when the source and

detector are positioned at

closer, optimum ranges to

see through high levels of

contamination. A visible red

sensing beam and wide field-

of-view mean quick and easy

installation and alignment.

Polarized Reflex

Another sensing mode

available in the 30 mm

models is polarized reflex.

In this mode, the sensing

beam is reflected from a

retroreflector back to the

sensor. The maximum range

of 34 ft is also among the

longest available on the

sensor market. The polarizing

filter built into the sensor

ensures only light reflected

off a corner cube

retroreflector is recognized by

the sensor. This allows

reliable detection of shiny

targets that could reflect light

back to the sensor and be

missed by a non-polarized

version. As in all models, a

visible sensing beam is

featured for easy installation

and alignment.

Chemical