Headquarters: SIKO GmbH Weihermattenweg 2 79256 Buchenbach Germany Phone+49 7661 394-0

Wire-actuated encoder SG21

small design for rotary encoder mounting with 2000 mm measuring length

Compact wire-actuated encoder for rotary encoders with max. 36 mm diam. flange

Profile SG21:

  • Wire-actuated encoder for rotary encoder with max. Ø40 mm flange
  • Measurement lengths up to 2000 mm
  • Sturdy zinc die-cast housing, robust design, stable measuring rope (stainless steel)
  • Very compact design

Inquire about product/Add to leaflet
Mechanical data
FeatureTechnical dataAdditional information
Housingzinc die-cast
Wire designø0.45 mm

steel wire (stainless), plastic coated

Extension force≥2 N

T1 operating temperature

≥11 N

T2 operating temperature

Measured distance/ rope drum revolution100 mm
Weight~0.2 kg
Electrical data
Rotary encoders suitable for the SG21 are featured in RotoLine catalogue 2. Depending on the output signals the following are suitable for…
  • Incremental outputs: IV2800
  • Absolute outputs: WV36M/SSI, WV36M/CAN

The technical specifications for these devices are given in the respective data sheet.  A number of transmitter versions of various manufacturers can also be used. 
System data
FeatureTechnical dataAdditional information
Repeat accuracy ±0.15 mm

per direction of approach

Travel speed≤1 m/s
Ambient conditions
FeatureTechnical dataAdditional information
Ambient temperature-10 … 80 °C T1
-40 … 80 °C T2
Wire-actuated encoder SG21
Hint for mounting

When securing the wire it must be ensured that the wire is straight and vertical in relation to the wire outlet.  Recommendation: Only select the starting position after an unwound length of approx. 5 mm. This prevents the wire hitting the end stop when it is rewound. 

SG21 Hint for mounting
symbolic depiction

Scope of delivery
  • SG21
  • Mounting instructions
Ordering table
Feature Order data Specifications Additional information
Rope fixture
wire suspension with thread
wire suspension with hook
Encoder type
without encoder
a wide range of encoders can be usedsee accessories
Operating temperature
-10 … +80 °C
-40 … +80 °C
Ordering key

share me


Mathias Roth

Mathias Roth
Scan the code with a suitable APP to include the contact into your phone.

Download vCard


David Fechtig

David Fechtig
Scan the code with a suitable APP to include the contact into your phone.

Download vCard