FEATURES:

• Multipoint monitoring of Oxygen and Carbon Dioxide 
• The fast response time makes it possible to sample a large number of fermentors in a short time interval
• The stability of the  PAS/MA measuring principle enables long batch-runs without calibration.
• Low sample flow - easy to use with small bench scale fermentors
• Fast and precise response makes it possible to dertermine the respiratory quotient with high integrity
• Inexpensive compared to Mass Spectrometers

BENEFITS:

• Finding optimum age for transfer from seed tank
• Optimize air flow
• Controlling Nutrient addition at optimum rate
• Correlate present run-data to past run-data

The figure above to the right shows a typical fermentation gas monitoring system. The system includes the Fermentation Monitor - INNOVA 1313 and the Multipoint Sampler - INNOVA 1309. Up to three INNOVA 1309's can be used in one system. The bioreactors are operated at slightly over pressure relative to atmospheric. From the exhaust lines a gas sample is drawn from each fermentor and passed through a membrane separator to remove condensed water and possible foam. The sample is then pumped to the multipoint system, the final length of the sample line being NAFION® tubing in order to equalize the water vapour content with the ambient level. Each sample from the fermentors is then passed in turn to the monitor via NAFION® tubing, again at a flow rate of 130 ml/min.

Digram showing a 3-channel monitoring system