Specifications include, but are not limited to: Understanding stress in plants can be a complex task that is influenced by various environmental and biological factors. The LI-600 Porometer/Fluorometer is a reliable instrument that combines the functions of a porometer and a fluorometer to accurately measure stomatal conductance and chlorophyll fluorescence within seconds. The LI-600 is compact porometers with PulseAmplitude Modulation (PAM) fluorometers that simultaneously measure stomatal conductance and chlorophyll a fluorescence over the same leaf or needle area. It has built in Photosynthetically Active Radiation (PAR) sensor measures ambient light and Infrared leaf temperature with each measurement, internal bar code scanner, the instrument must contain internal Lithium/Ion batteries for 8 hours of nominal operation. A GPS receiver tracks location and an accelerometer/magnetometer records data needed to calculate a leaf's angle of incidence to the sun. Specifically designed for efficient plant stress evaluations, the LI-600 offers the speed and precision that plant physiologists require in their work. Please note: This is a Sole Source Notification.