LI-600 is a compact instrument that simultaneously measures stomatal conductance and pulse modulated (PAM) chlorophyll fluorescence, capable of measuring the same area of the same leaf. The original intention of the LI-600 design is to quickly and accurately investigate the transpiration and photosynthesis changes of plants under environmental conditions, providing scientists with field investigations of changes in plant physiological parameters.

The instrument can automatically record measurement values when the parameters are stable, or manually measure through buttons.

main features

Quick investigation is convenient to use

● USB - Charging Data Download
● Clear and visible display screen under sunlight, showing the status of the instrument, real-time readings, and recent measurement results
The barcode scanner directly reads sample information, reducing manual errors
● Built in rechargeable battery, capable of continuous operation for over 8 hours
Ergonomic design and lightweight appearance for easy grip
Complete the measurement in just a few seconds

Continuous measurement data is reliable

Infrared temperature sensor can quickly and accurately measure blade temperature
● Built in photon sensor records photosynthetically active radiation in the environment near the blade
● Automatic or manual matching of relative humidity sensors to ensure accurate measurement of differences
Soft gasket material adheres to the blades to minimize diffusion and high flow leakage as much as possible
● Automatic leak detection to ensure accurate measurement of the inner blade surface of the aperture

Technical Parameter

Measurement of stomatal conductance

Measurement hole: 0.75cm diameter
Flow rate: low 75 μ mol/s, medium 100 μ mol/s, high 150 μ mol/s
Relative humidity sensor accuracy: ± 2%
Reference temperature: ± 0.2 ℃
Accuracy of blade temperature sensor: ± 0.5 ℃
Measurement of intake flow rate: ± 1% of reading @ 75~150 μ mol/s
Exhaust flow rate measurement: ± 5% of the full range, with an upper limit of 150 μ mol/s

Measurement parameters

Pore conductance g_sw（mol m^-2s^-1）； Boundary layer conductivity g_bw（mol m^-2s^-1）； Total conductivity g_tw（mol m^-2s^-1）； Transpiration rate E (mol/m)^-2s^-1）
Leaf chamber vapor pressure VP_cham（kPa）； Reference vapor pressure VP_ref（kPa）； Leaf water vapor pressure VP_leaf（kPa）； Saturated vapor pressure deficit VPD_leaf（kPa）
Reference chamber water vapor concentration H₂O_ref（mmol/mol）; Sample chamber water vapor concentration H₂O_samp（mmol/mol）; Leaf water vapor concentration H2O_leaf（mmol/mol）

Technical parameters of fluorescence meter

Saturation flash type:
Rectangular saturation flash and multi-phase saturation flash (MPF)
Measurement of peak wavelength of light: 625nm
Peak light intensity: 0-10000 μ mol m^-2s^-1
Saturated flash intensity: 0-7500 μ mol m^-2s^-1

LED Risk Group: Exemption Group in accordance with IEC 62471:2006. LED does not cause any photobiohazard

Obtainable parameters

Minimum fluorescence signal value under Fo dark adaptation
Maximum fluorescence signal value under Fm dark adaptation
Potential maximum photoelectrochemical quantum efficiency of Fv/Fm
Real time fluorescence signal value of F
Steady state fluorescence signal value under Fs light
Minimum fluorescence signal value under Fo 'light
Maximum fluorescence signal value under Fm 'light
Actual photochemical quantum efficiency of PSII
ETR electron transfer rate
Maximum photoelectrochemical quantum efficiency of photosystem II under a given light intensity of Fv '/Fm'
Fq '/FV', also known as qP, is the photochemical quenching coefficient
NPQ non photochemical quenching
QN non photochemical quenching coefficient
QE non photochemical quenching of fast phase components
Light suppressed quenching components in qI non photochemical quenching
QL light system ll reaction center opening ratio (lake model)

Optional configuration

PF type pore fluorescence analyzer P-type pore analyzer (can be upgraded with 600-01F fluorescence analyzer kit in the future to become PF type)

Origin and Manufacturer: LI-COR Corporation, USA