Kbler sendix 50005020 incremental optical encoders shafthollow shaft kubler 8502028423600 an incremental encoder using digital optical technology the encoder has a hollow shaft and has a 3600ppr rate the output circuit is of the rs422 type with an inverted signal the device has been constructed with a safety lock design that gives high resistance against vibration and installation errors the rugged housing and wide operating temperature range makes this encoder suitable for use in a