Brand:NANBEI Model:NB-3051C Plant Photosynthesis Tester Application:The NB-3051C Plant Photosynthesis Tester can measure the gas CO2 concentration, air temperature and humidity, plant leaf temperature, light intensity, gas flow and other factors, and calculate the plant photosynthesis (respiration) rate, transpiration rate, intercellular CO2 concentration and stomatal conductance.