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LI-600N – Poromètre / fluoromètre

Le seul poromètre / fluoromètre optimisé pour la mesure de conductance stomatique et la fluorescence de la chlorophylle d'une aiguille, d'une feuille étroite ou d'un brin d'herbe.

  • SKU : E473-LI-600N
  • Fabricant : Li-Cor
How it’s different

The LI-600N is designed to quickly survey needles, narrow leaves, and grasses under ambient conditions.

  • REACHES STABILITY IN 5-15 SECONDS ACROSS A RANGE OF GSW RATES.
  • LOG A MEASUREMENT WITH THE PRESS OF A BUTTON.
How it works

The LI-600N brings together numerous innovative technologies to deliver fast, accurate, and dependable measurements in a compact, handheld device.

Stomatal conductance

The LI-600N uses an open flow-through differential measurement for quantifying transpiration (E) and stomatal conductance around the needle or narrow leaf. First, E is quantified by measuring the flow rate and water vapor mole fraction of air that enters and leaves the chamber. Meanwhile, total conductance to water vapor (gtw) is computed as a function of E and vapor pressure in the leaf and cuvette. Finally, stomatal conductance to water (gsw) is computed as a function of gtw and the boundary layer conductance to water vapor (gbw).

The advantages of the LI-600N measurement flow path include the following:

  • FLOW RATES QUICKLY FLUSH THROUGH THE SMALL CHAMBER VOLUME AND RESULT IN RAPID STABILIZATION FOR QUICK MEASUREMENTS
  • MINIMALLY DISTURBED LIGHT, CO2AND H2DURING THE MEASUREMENT ELIMINATE THE NEED FOR DESICCANT CHAMBERS OR CORRECTIONS FOR LARGE DIFFUSION GRADIENTS
  • AUTOMATIC MATCHING ACCOUNTS FOR DRIFT BETWEEN THE REFERENCE AND SAMPLE SENSORS
High accuracy at low conductance

Get high-quality, accurate measurements from single needles and blades of grass, even at extremely low conductance.

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