Plant photosynthesis can be measured as CO2 and O2 gas exchange with our Q-Box packages or customized gas exchange measuring systems in single or multiple samples when gas switching system is included. Measurements of algal photosynthesis as gas exchange in head space or changes in dissolved CO2 and O2 in liquid can be made with our CO2 gas analyzers or dissolved CO2 and O2 systems. Study photosynthesis in both plants and algae through changes in chlorophyll fluorescence. Small hand-held and high throughput large phenotyping systems are available.