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Motor Technology - GEL247
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MiniCoders are designed for installation in drives as an alternative to the conventional encoders.


They are contact-less and are equipped with a magnetic scanning system which, in conjunction with a toothed wheel as measuring scale, permit the measurement of rotary motion. This solution is exceptionally space-saving.


For the measurement of linear motion, a pitch structure in a piston rod can be detected by the MiniCoders.


The sensor elements, the magnet and the integrated electronic system are incorporated in state-of-the-art microsystem technology and are fully encapsulated.


The design together with subsequent circuitry ensures an electrically and mechanically robust product.





MiniCoders are dew-point proof, do not wear and are insensitive to dirt, shock and vibration. The measuring scales can be so designed that every machine geometry be accommodated (interior and exterior diameter, impulse number). MiniCoders require no maintenance and thus have a low cost of ownership. This extremely flexible system offers you not only long term reliability but also solutions to gain a competitive edge.

he incremental encoders are used to convert rotary motion into electrical impulses.



technical data


  GEL 247 GEL 2471 GEL 2472

Description / technical features

Flange mounting requires no adjustment. Particularly suitable for outdoor application. Customised cables and connectors. Stainless steel housing. Pressure-resistant up to 250 bar (GEL 247).

Flange mounting requires no adjustment. 


GEL 2471 scans targets made of electrically conducting material e.g. Aluminium.

Flange mounting requires no adjustment.


GEL 2472 two electrically isolated measuring system in one housing.

Motion detection

rotary, linear (with two sensors)

rotary rotary
Max. air gap 1.5 mm 1.5 mm 1.5 mm

Module M / pitch P

M = 1 up to 3.5 / P = 4

M = 2.0 bis 3.0 M = 2.0 bis 3.0
Frequency range 0 ... 25 kHz 0 ... 20 kHz 0 ... 20 kHz

Measuring scale

measuring toothed-wheel, measuring rod, piston rod

measuring toothed-wheel, 

wheel with involute teeth

measuring toothed-wheel, 

wheel with involute teeth

Temperature range

-40 ... + 120 C

-40 ... + 120 C -40 ... + 120 C

Protection class

IP 68

IP 68 IP 68

Supply voltage

10 ... 30 V DC

10 ... 20 V DC 10 ... 20 V DC

Fields of application

Mounting in motors, gears, railway motors and bogies, piston rods with great diameter, off-shore.

Mounting in motors, gears, railway motors and bogies Mounting in motors, gears, railway motors and bogies

Output signals

Square wave 10 ... 30 V

Square wave 10 ... 20 V Square wave 10 ... 20 V
Further information Technical information GEL 247 Technical information GEL 2471

Technical information GEL 2472