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AL... 40 Singleturn Looper

ALS 40, ALPA 40, ALV 40, ALA 40, FGL 40

Singleturn looper encoder

Loop lifter or looper encoders are subjected to demands that shorten their service life considerably. The looper encoder from Johannes Huebner Giessen AL... 40 is especially designed and built for this field of application, a fact that enables it to provide service lives many times greater than is usually the case. Filled with a special grease, the bearings have a 40 percent higher dynamic load rating and are suitable for shock loads up to 450 g. A special radial shaft seal and additional sealing lip provides the required level of protection in harsh environments. It is possible to configure the looper encoder AL... 40 via an SSI or parallel interface.


Number of interfaces


Diameter solid shaft

14 mm

Supply voltage

12 - 30 VDC


max. 13 bit (8192 steps per revolution)

Degree of protection

IP66 / IP67

Approved mechanical speed

up to 4000 rpm

Vibration resistance

20 g (=200 m/s²)

Shock resistance

450 g (=4500 m/s²)

Device temperature range

-25 °C to +100 °C


approx. 3.5 kg

Special features

Ball bearings with 40 % higher load rating, strengthened shaft

Operating and Assembly Instructions (PDF, 1.62 MB) Download
Catalog - Looper encoders (PDF, 1003 KB) Download
Catalog - Absolute encoders (PDF, 1.8 MB) Download
Inquiry form - Absolute encoders (PDF, 179 KB) Download
Case Study - Looper, rolling mill (PDF, 175 KB) Download


Standard dimension drawings and connection diagrams are provided in the Operating and Installation Instructions. We would be pleased to send you individual variations as well as DXF/STEP files on request.

Interface Product
ParallelALPA 40
0 - 10 VALV 40
4 - 20 mAALA 40
IncrementalFGL 40