CSAS3F3RY2202 datasheet(6/102 Pages) EATON

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Volume 8—Sensing Solutions

CA08100010E—September 2017

www.eaton.com

V8-T3-5

3.0

Inductive Proximity Sensors

Introduction

Extended Range Sensors

Extended range proximity sensors by Eaton’s Electrical Sector offer sensing distances almost three

times greater than conventional devices. They are available in semi-shielded designs: mounted

similar to an embeddable sensor—and non-embeddable designs requiring more metal free zone

area than conventional unshielded sensors. All are available in a variety of circuits and terminations.

Target Material

When manufacturers of

inductive proximity sensors

state the sensing range of

their devices, they are usually

based upon a ferrous target

made of carbon-rolled steel

(IE FE 360) defined by

ISO630. For example, in

this product guide the

E57P-18SPN5-C2 has a

sensing range of 5 mm based

upon a target of mild steel.

Sensing ranges to targets

made of non-ferrous metals

have to have a correction

factor applied as listed in the

table below. To use this

table, multiply the sensing

distance of the device by

the factor given.

Example: The E57P-18SPN5-C2

has a sensing range of

5 mm. When used to sense

a brass target, the sensing

range becomes 2.25 mm

(5 mm x 0.45).

Table of Correction Factors

Multiply sensing range of device by factor given below.

Correction Factors

Target Size

Often overlooked when

applying sensors is the fact

that the manufacturer’s

stated sensing ranges are

also dependent upon target

size. The table below reflects

the standard target sizes

which were used to

determine sensing ranges.

If targets are the same size

or greater than standard, no

reduction in sensing distance

will occur. However, a

smaller target size will result

in a decrease in sensing

range.

A general rule of thumb is

that the target size shall be

three times the range or the

size of the sensor face,

whichever is larger.

Standard Target Size 1

Note

1 Targets are 1 mm thick.

Sensor Size

Target

4–8 mm

12 mm

18 mm

30 mm

Limit Switch

Stainless steel 400

0.90

1.0

Stainless steel 300

0.65

0.70

0.75

0.85

Brass

0.35

0.45

0.5

Aluminum

0.35

0.40

0.45

0.40

0.47

Copper

0.30

0.25

0.35

0.30

0.40

Standard Sensing Range

Extended Sensing Range

Target

Shielded Devices

Unshielded Devices

Semi-Shield Devices

Non-Embeddable Devices

4 mm

4 mm square

—

5 mm

5 mm square

—

6.5 mm

6.5 mm square

—

8 mm

8 mm square

—

12 mm

12 mm square

18 mm square

30 mm square

18 mm

18 mm square

24 mm square

36 mm square

60 mm square

30 mm

30 mm square

45 mm square

66 mm square

—

Limit switch

45 mm square

72 mm square

—

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