cobas 6000 Series system || c6000, Chemistry (Photometric, Discrete), for clinical Use. Modular e601: Immunoassay Analyzer || Product Usage: || The cobas p501/p701 instrument stores primary and secondary sample tubes. The tubes are stored in a controlled, refrigerated sample store. Automatic retrieval for add-on testing is possible at any time. Expired samples are disposed of automatically when their storage time has elapsed. The instrument is intended as accessory for diagnostic use.