Evolution CO2 AnalyserEVOLUTION CO2 ANALYSER The Evolution CO2 Analyser is an add on unit for the Evolution Carbon Dioxide Controller. It constantly monitors CO2 levels inside grow rooms for more accurate environmental control. Non dispersive Infra Red sensing technology helps to provide high accuracy and fast response CO2 monitoring. For use alongside the Evolution Carbon Dioxide Controller only. Do not use with other CO2 controllers.