SICK encoder Germany SICK-Sensor Intelligence (Schke - Intelligent Sensor expert)-- SICK focuses on providing increasingly intelligent sensor parts and overall solutions for logistics automation, factory automation and process automation. Founded in 1946, Schke has grown into an active group with nearly 5,000 employees and 2008 sales of Euro737 million. Continuous innovation, technology and strict cost control ensure Schke's leading position in the market in a wide range of applications. SICK Germany has incremental encoders and pair encoders. Incremental encoder is only output pulse rotary encoder, pair rotary encoder for each position of the shaft to provide a unique encoder value, relative to the incremental need to work with the counter and other computing control unit use, in the positioning control, because the output is to the position, so in power failure, position information will not be lost, no need to return to the reference point to reposition.