The LI-6800 new generation photosynthesis fluorescence automatic measurement system can be configured with multiple optionsLeaf ChamberCan meet the measurement needs of various shapes and sizes of blades; If the measurement sample is special, a convenient homemade blade chamber adapter can directly connect your customized blade chamber to the LI-6800 analyzer; The insect breathing chamber can measure the respiration of insects and small animals.
LI-6800 photosynthesis analyzer light source and leaf chamber:
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| Fluorescent leaf chamber(6800-01A) | |
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Fluorescent Leaf Chamber 6800-01AComposed of a light source and a leaf chamber, it is a leaf chamber that combines pulse modulation and continuous excitation fluorescence measurement, capable of synchronously measuring chlorophyll fluorescence and gas exchange at the same leaf position. Can measure 6cm2Measure 2cm with the blade or small leaf adapter2The leaves. The light source includes a pulse modulated PAM fluorometer, which provides a highly homogeneous light field on the blade surface with a saturation flash intensity of up to 16000 μ mol/m-2s-1The saturation flash intensity provided by LI-6800 is unparalleled by any other fluorescence analyzer on the market, and it can achieve accurate measurement of Fm 'to the greatest extent possible. And Fm 'is the basis for calculating a series of fluorescence parameters such as Φ PSII, NPQ, etc. It can measure the parameters Fo, Fm under dark adaptation and Fs, Fm ', Fo' under light adaptation, and automatically calculate multiple fluorescence parameters such as potential maximum photochemical quantum efficiency Fv/Fm and electron transfer rate ETR. Furthermore, the 6800-01A fluorescent leaf chamber can measure the fluorescence induced kinetic curve OJIP. |
| Modulated light | software control |
| modulation frequency | 1 Hz~250 kHz |
| Measure the peak wavelength of light waves | 625 nm |
| Red action light and saturation flash peak wavelength | 625 nm |
| Blue action light peak wavelength | 475 nm |
| Far red light peak wavelength | 735 nm |
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Operating light output range |
Total light intensity: 0-3000 μ mol m-2s-1@ 25℃ Blue light: 0-1000 μ mol m-2s-1@ 25℃ Red light: 0-2000 μ mol m-2s-1@ 25℃ Saturated flash output range: 0-16000 μ mol m-2s-1@ 25℃ Far red light output range: 0-20 μ mol m-2s-1@ 25℃ |
| Fluorescence signal temperature dependence | Drift of -0.25% per ℃ |
| power consumption | <18 W @ 25℃ 3000 μmol m-2s-1作用光下 <60 W @ 25℃ 16,000 μmol m-2s-1Under saturated flash |
| measure area | 6 cm2,2 cm2rotundity |
| size | 16.6×11.5×13.6 cm(L×W×H) |
| weight | 0.86 kg |

Typical Spectral Output of Red, Blue, and Far Red LEDs in Fluorescent Leaf Chambers
| Red, green, blue, and white 4-color large light source (6800-03) | |
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Red, green, blue, and white 4-color light source 6800-03Can provide red, green, blue, and white light (with maximum intensities up to 2400, 1000, 2000, and 1500, respectively)Mmolm-2s-1)Mixing lighting in any proportion. The light field of the light source has high homogeneity. The built-in photon sensor measures the PAR value above the blade, enabling real-time measurement of the light intensity inside the blade chamber.The large light source can be used in conjunction with the 6800-13 large leaf chamber, 6800-17 small plant leaf chamber, and 6800-24 moss leaf chamber. |
| Total output range | 0~>2500Mmol m-2s-1@ 25℃ |
| Blue light output range | >2000Mmol m-2s-1@ 25℃ |
| Green light output range | >1000Mmol m-2s-1@ 25℃ |
| Red light output range | >2400Mmol m-2s-1@ 25℃ |
| White light output range | >1500Mmol m-2s-1@ 25℃ |
| Blue light peak wavelength | 453 nm |
| Green light peak wavelength | 523 nm |
| Red light peak wavelength | 660 nm |
| White light color temperature | 4000K |
| power consumption | Total light intensity 2000Mmol m-2s-1Under equal conditions of red, green, blue, and white light, the power consumption is 15W |
| Working temperature range | 0~50℃ |
| Range of relative humidity at work | 0~85% |
| size | 11.7×11×13 cm(L×W×H) |
| weight | 0.54 kg |

Typical Spectral Output of 6cm × 6cm Red Green Blue White Large Light Source LED
| 3 × 3cm red blue light source (6800-02) | |
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Red and Blue Light Source 6800-02It is a 3x3cm specification light source. Directly installed on the upper part of a 3x3 cm transparent leaf chamber, it can provide 0-2500Mmolm-2s-1Intensity of illumination, red light from the light source (0~2000)Mmolm-2s-1)And blue light (0~500Mmolm-2s-1)Can be individually regulated. Advanced reflector design and precise LED layout control ensure high uniformity of the light field on the blades of the light source. The built-in light quantum sensor measures the light intensity of the LED and provides real-time feedback for controlling the illumination of the leaf chamber. |
| Total output range | 0~>2000Mmol m-2s-1@ 25℃ |
| Blue light output range | 0~>400Mmol m-2s-1@ 25℃ |
| Red light output range | 0~>1600Mmol m-2s-1@ 25℃ |
| Red light peak wavelength | 660 nm |
| Blue light peak wavelength | 453 nm |
| power consumption | <5 W @ 2000Mmol m-2s-1 |
| Working temperature range | 0~50℃ |
| size | 6.6×5.9×5.8 cm(L×W×H) |
| weight | 0.21 kg |

Typical Spectral Output of 3cm × 3cm Light Source LED
| 3 × 3cm transparent leaf chamber(6800-12A) | |
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Standard 3 × 3 cm transparent leaf chamber (6800-12A)Featuring a durable and transparent top, it is used to measure the net photosynthetic rate and transpiration rate of plants under ambient lighting, and can be directly connected to a 3 × 3cm light source (6800-02) for use. Paired with 3×3 cm, 2×3 cm and 1×A 3 cm adapter can directly measure blades of different widths without modifying the leaf area value. |
| Measure hole area | 9 cm2(3cm×3cm),6 cm2(2cm×3cm),3 cm2(1cm×3cm) |
| size | 15.4×;11.5×;5.9 cm(L×W×H) |
| weight | 0.3 kg |
| Large Leaf Chamber(6800-13) | |
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Large Leaf Chamber 6800-13Having a diameter of 36 cm2The measurement area is suitable for measuring large leaves and needles that can cover most or all of the leaf chamber. This large leaf chamber is more flexible in measuring blades of different shapes and sizes, and has a higher signal-to-noise ratio, especially suitable for measuring samples with low flux gas exchange, such as low photosynthetic rate or dark respiration rate. The LI-6800 has a much larger flow rate than other photosynthetic instruments, making it possible to measure such a large leaf area. |
| Large Leaf Chamber 6800-13 | |
| Maximum leaf area | 36 cm2 |
| size | 16.8×11.5×5.9 cm(L×W×H) |
| weight | 0.35 kg |
6800-13Large leaf chamber with needle branch measuring block
| Maximum leaf area | 36 cm2 |
| Height inside the leaf chamber | 6.7cm |
| Outdoor dimensions of the leaf | 16.8×11.5×7.2cm(L×W×H) |
| volume | 420.8cm3 |
| Small Plant Leaf Chamber (6800-17) | |
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Small Plant Leaf Chamber (6800-17)Capable of measuring the entire Arabidopsis thaliana plant and other small plants, such as low grass growing in cones measuring 65mm (2.5 inches) or 38mm (1.5 inches). The top is transparent PropafilmTMThe material of the film can be measured under ambient light. The small plant leaf chamber 6800-17 is compatible with large light sources (6800-03) and can be measured in any combination of red, green, blue, and white light. |
| Leaf chamber volume | 193.2 cm3(Internal volume) |
| Indoor dimensions of the leaf chamber | Diameter 7 cm; Depth 4.46 cm |
| Outdoor dimensions of the leaf | 8.4 × 12.7 × 6.47 cm(W×L×H) |
| weight | 0.60 kg |
| Aquatic Measurement Room(6800-18) | |
| CO2gas analyzer | Working principle: Non dispersive infrared analyzer (NDIR) Accuracy: At 400 μ mol/mol, RMS≤0.1μmol/ mol@4s Average signal Measurement range: 0-3100 µ mol/mol |
| CO2control | Range: 0-2000 µ mol/mol Other gases can be connected through the user's gas inlet. |
| Fluorescence analyzer (6800-01A) | Red blue interaction light output: 0-3000 µ mol m-2s-1 Far red light output: 0-20 µ mol m-2 s-1 Saturated flash intensity: 0-16000 µ mol m-2 s-1 Red action light peak wavelength: 625 nm Blue action light peak wavelength: 475 nm Far red light peak wavelength: 735 nm |
| temperature | Working temperature: 0~50 ℃ (no direct sunlight, no icing) Storage temperature: -20~60 ℃, keep the measuring room clean and dry Temperature control: Self provided water bath, # 10-32 threaded connection to the measuring room |
| Operating liquid environment | Temperature: from freezing point to 50 ℃ Salinity: 0-35% |
| Moss Leaf Chamber (6800-24) | |
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Moss Leaf Chamber (6800-24)Used to measure CO in mosses such as dinoflagellates, mosses, and lichens2And H2Gas exchange of O. When measuring, place these algae or mosses in a shallow dish in the moss leaf chamber, which has a transparent and clear PropafilmTMAt the top, measurements can be taken under ambient lighting conditions. Moss leaf chambers are compatible with large light sources and can be measured under any combination of red, green, blue, and white light intensities. |
| Moss Leaf Chamber 6800-24 | |
| Leaf chamber volume | 193.2 cm3(Internal volume) |
| Indoor dimensions of the leaf chamber | Diameter 7 cm; Depth 4.45cm |
| Outdoor dimensions of the leaf | 8.4 × 12.7 × 6.47 cm(W×L×H) |
| weight | 0.60 kg |
| Homemade Leaf Chamber Adapter (6800-19) | |
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Homemade Leaf Chamber Adapter (6800-19)You can connect your self-made blade chamber to the analyzer and host of LI-6800 to meet your customized experimental needs. The self-made blade chamber adapter kit includes hardware such as adapters and pipeline joints, as well as an adapter drawing used to determine the position and size of the self-made blade chamber opening. |
| Homemade Leaf Chamber Adapter 6800-19 | |
| Leaf chamber volume | 34.2 cm3(Internal volume) |
| size | 1.25 × 7.67× 5.85 cm (L × W × H) |
| Insect breathing chamber(6800-89) | |
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Insect respiratory chamber (6800-89)Used to measure the respiration of insects and other small animals or fruits. The airflow passes through the insect respiration chamber, and LI-6800 calculates the respiration rate of the sample based on the differential concentration between the reference chamber and the sample chamber. The respiratory rate here is calculated based on the mass of the sample being tested. The insect breathing chamber kit includes a 6800-19 homemade leaf chamber adapter. |
| Insect respiratory chamber 6800-89 | |
| Leaf chamber volume | 49.9 cm3(Excluding connecting pipes) |
| Outdoor dimensions of the leaf | Length 11.25 cm; diameter 3 cm |
| weight | 0.07 kg |
| Soil Carbon Water Flux Measurement Room(6800-09) | |
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Soil Carbon Water Flux Measurement Room (6800-09)Measurable surfaceCO2andH2ORelease speed. Measure indoor diameter20cm, usingAdvanced research and development by LI-CORTechnology is the global standard for measuring the release rate of surface gases.6800-09The measurement speed is fast and can be used to study the spatial variation of surface gas release rate. Data can be directly inputtedSoilFlux ProTMSoftware for subsequent analysis, including data viewing, mapping, editing, and recalculation.6800-09It also includes a sensor for measuring soil moisture content and temperature. |
| Soil Carbon Water Flux Measurement Room 6800-09 | |
| System volume | 4244.1 cm3 |
| IRGA volume | 57 cm3 |
| Sampling area | 317.8 cm2(49.3 in2) |
| Thermistor type temperature sensor | range,-20℃ to45℃;accuracy:±0.5℃@ 0~70℃ |
| weight | 4.06kg |
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