Balluff BTL7-A5 Series, User Manual

www.balluff.com

11

english

Ignition protection

“nA” and “tb”

4.3 

Installing the transducer

NOTICE

Interference in function

Improper installation can compromise the function of the 
transducer and result in increased wear.

►

The mounting surface of the transducer must make 
full contact with the supporting surface.

►

The bore must be perfectly sealed (O-ring/flat seal).

►

For secure fastening, tighten the transducer with 

cylinder screws (ISO 4762, M6 × 16 - A2-70) at all 

6 mounting holes.

►

All screws must be tightened with 3.5 Nm.

►

Install the magnet (accessories).

►

From 500 mm nominal length: support the rod and 

tighten it at the end if necessary (only possible with a 

diameter of 10.2 mm).

4.3.1  Installation recommendation for hydraulic 

cylinders

If you seal the hole with a flat seal, the max. operating 

pressure will be reduced in accordance with the larger 

pressurized surface.

If installing horizontally in a hydraulic cylinder (nominal 

lengths > 500 mm), we recommend affixing a slide element 

to protect the rod end from wear. 

Dimensioning of the detailed solutions is the 

responsibility of the cylinder manufacturer.

The slide element material must be suitable for the 

appropriate load case, medium used, and application 

temperatures. E.g. Torlon, Teflon or bronze are all possible 

materials.

Fig. 4-4: 

Slide element

Magnet

Example 1, transducer installed with slide element

The slide element can be screwed on or bonded. 

►

Secure the screws so they cannot be loosened or lost.

►

Select a suitable adhesive.

Slide element

rod

Piston rod

Slide surface

Flow gap

Fig. 4-5:  Detailed view and top view of slide element

There must be a gap between the slide element and piston 

bore that is sufficiently large for the hydraulic oil to flow 

through.

Options for fixing the magnet:

– Screws

– Threaded ring

– Press fitting

– Notches (center punching)

If installed in a hydraulic cylinder, the magnet 

should not make contact with the rod.

The hole in the spacer ring must ensure optimum guidance 

of the rod by the slide element.

Fig. 4-6: 

Spacer ring

Magnet

Fixing of magnet

Fixing of magnet

An example of how to install the transducer with a 

supporting rod is shown in Fig. 4-7 on page 12.

4

Installation and connection (continued)

BTL7-A/C/E/G5 _ _ -M _ _ _ _ -K(8)-NEX-SR32/K_ _ _

Micropulse Transducer - Rod Style