A MICRO-PAM system involves several light-weight chlorophyll fluorometers for field use. Being capable of multi-site monitoring of photosynthesis over weeks and months, the MICRO-PAM is tailored to study plant responses to environmental changes in nature and under controlled conditions. Due to its compact measuring heads, the MICRO-PAM is suited for smaller samples than those typically probed by the established MONITORING-PAM.
Originally, the MICRO-PAM has been developed to measure photosynthesis of lichens growing on rocks or in biological soil crusts. The actual field of application includes herbaceous plants, shrubs and trees. In addition to determining photosynthesis yield by the saturation pulse technique, the measuring heads record light intensity and temperature by external sensors, and humidity by an internal sensor.