Sample identification in chemistry analyzers.

摘要

An automatic clinical chemistry analyzer includes a sample wheel or carousel (12) with spaced reaction cups (11). Discrete occlusions (47) and apertures (46) located around and part of the wall of the sample wheel are indexed to specific sample cups. A sensor (48) located around the periphery reacts to an optical reflectance and non-reflectance signal such that specific sample cups can be identified by the sensor.