Measures the oxygen and carbon dioxide in exit gas. Incorporates a flow meter and pump which ensures a constant flow of gas through the analyser independent of varying air sparge rates through the fermentation vessel. CO2 measurement (range 0 to 10%) is by I.R. absorption, O2 measurement (range 0 to 50%) by utilising an electrochemical sensor. Separate LED displays are provided and analogue outputs can be connected to existing fermentation equipment. Overall W x D x H 190 x 330 x 190mm. For 230V 50/60Hz single phase supplies.