User Manual Manual

871TM Extended Range

Inductive Proximity Sensors

User Manual

SUMMARY The Extended Range 871TM all stainless steel family of inductive proximity sensors offers sensing

ranges 2x--3x those of standard inductive models. In addition to providing equal sensing distance for

mild steel and aluminum, the 871TM Extended Range also senses other metals at ranges greater

than standard technologies. Although extended sensing range technology allows for improved

performance, certain additional installation/application considerations must be taken into account.

TARGET

CONSIDERATIONS Material:

Unlike standard proximity sensors which offer considerably less sensing distance for nonferrous

metals, Extended Range 871TM proximity sensors detect such materials at distances almost equal

to that of steel. See the correction factor char t below for the most common target materials:

Correction Factors:

Note: Correction factor data based on standard target sizes (IEC 60947--5--2 / 8.3.2.1.1)

Barrel Diameter Steel FE 360 Copper Aluminum Brass

Stainless Steel

1mm Thick

Stainless Steel

2mm Thick

Shielded M12 1.0 0.85 1.0 1.3 0.45 0.9

Unshielded M12 1.0 0.8 1.0 1.3 0.5 0.9

Shielded M18 1.0 0.85 1.0 1.3 0.4 0.8

Unshielded M18 1.0 0.85 1.0 1.3 0.1 0.8

Shielded M30 1.0 0.9 1.0 1.2 0.5 0.9

Unshielded M30 1.0 0.85 1.0 1.2 no detection 0.5

Note:Stainless Steel targets are the exception; sensing distances for stainless steel are dependent on target

size, thickness and grade.

Target Thickness:

The sensing behavior of conventional inductive proximity sensors is only slightly influenced by the

thickness of the target, foils being the one exception. Generally aluminum foil will produce a higher

sensing range than thicker metals. 871TM Extended Range units however, behave differently. The

sensing distance for metals over approximately 1mm thick remains constant for most materials

(stainless steel excluded) used in machine construction. However, for targets less than 1mm thick

the sensing range decreases and foils, in general, c annot be detected.

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871TM Extended Range Inductive Proximity Sensors User Manual SUMMARY The Extended Range 871TM all stainless steel family of inductive proximity sensors offers sensing ranges 2x--3x those of standard inductive models. In addition to providing equal sensing distance for mild steel and aluminum, the 871TM Extended Range also senses other metals at ranges greater than standard technologies.
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871TM Extended Range User Manual MOUNTING CONSIDERATIONS Mounting considerations for shielded 871TM Extended Range units are essentially identical to those of any inductive proximity sensor. The unshielded models, however, require special mounting considerations as a result of their response to nonferrous metals. Due to the unusually long sensing ranges of the 871TM Extended Range, the sensing field extends farther back on the barrel and has a wider diameter than typical devices.