cobas c 311 analyzer

cobas c 311 analyzer
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First class performance

  • Over 130 assays and applications available (including drugs of abuse testing, Therapeutic Drug Monitoring (TDM), specific proteins and whole blood HbA1c1
  • Predictable turnaround time

Intelligent sample workflow 

  • 108 sample positions with continuous random access and flexible STAT priority settings1
  • Automatic determination of sample integrity  
  • Automatic sample dilution and rerun capabilities

Unique reagent concept

  • Convenient and error-free handling of cobas c packs
  • No preparation or mixing required
  • Economic usage with high stabilities and convenient kit sizes

High system reliability

  • Highly reliable system based on more than 35 years of experience
  • Comprehensive training and support from Roche organizations worldwide
  • Automated maintenance functions 
  • Low system maintenance time


cobas c 311

cobas® 4000 analyzer series

Freedom to realize your lab’s potential

The cobas® 4000 analyzer series consists of the cobas c 311 analyzer for clinical chemistry and the cobas e 411 analyzer for immunochemistry testing.



  1. cobas c 311 analyzer. Operator's manual. Roche Diagnostics International Ltd.

cobas c 311 analyzer

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cobas c 311 analyzer

Test throughput
  • Up to 300 photometric tests/hour
  • 450 ISE tests/hour
Number of channels 42 channels and 3 ISEs
Programmable parameters 86 photometric applications, 3 ISE applications, 3 serum indices, 8 calculated results
Sample material Serum/plasma, urine, CSF, WB (HbA1c only)
Sample input/output Disk with 108 positions for samples, calibrators and controls, plus W1 position for ISE cleaning solution, W2 position for ISE activator; user-definable STAT positions
Sample barcode types NW7 (Codabar); Code 39; ITF; Code 128
System interface RS-232C serial interface
Sample database 10,000 results (routine, STAT and QC)
Calibration methods Start-up, re-calibration for photometric assays: Linear, non-linear multi points, 2 point calibration, K-factor. Up to 100 calibrators pre-programmable, storage of up to 180 curves. Preventative calibration of standby cassettes. Two K-factors can be defined for different sample types.
QC methods Individual QC and cumulative QC. Up to 100 controls pre-programmable/Preventative QC after calibration of standby cobas c packs/Auto QC (without operator intervention).
Electrical requirements 115 Volts AC; Frequency 60 Hz +/- 0.5%
Water requirements Water Type: bacteria-free, deionized water
Water consumption ~ 12 L/hr during operation
Operating conditions Ambient room temperature of 15 to 32°C; relative humidity 30 to 85% non-condensing
Physical dimensions
  • Depth: 34 in (86.4 cm)
  • Height closed: 50 in (127 cm)
  • Height open: 67 in (170.2 cm)
  • Width: 52 in (132.1 cm)
Weight 550 lbs (250 kg)