Specifications

Distinguishing Specifications

For brevity, here are some specifications that distinguish the LI-6800.

CO2 Analyzers

  • CO2 Analyzer Precision: Within 0.1 µmol mol-1 RMS with 4-second averaging at 400 µmol mol-1

H2O Analyzers

  • H2O Analyzer Precision: Within 0.01 mmol mol-1 RMS with 4-second averaging at 10 mmol mol-1

System

  • Bulk Flow Rate Range: 680 – 1700 µmol s-1 at SATP1
  • Light Source Uniformity: <±10% variation over 90% of aperture
  • Chamber Temperature Control Range: 10 °C above or below ambient

Distinguishing Fluorometer Specifications

  • Modulation Frequency: 1 Hz – 250 kHz
  • Measuring Light Peak Wavelength: 625 nm
  • Red Actinic and Saturating Flash Peak Wavelength: 625 nm
  • Blue Actinic Peak wavelength: 475 nm
  • Far-red Peak Wavelength: 735 nm
  • Actinic Light Output:
    • 0 – 3000 µmol m-2 s-1 total at 25 °C
    • 0 – 1000 µmol m-2 s-1 blue at 25 °C
    • 0 – 2000 µmol m-2 s-1 red at 25 °C
  • Saturation Light: 0 – 16,000 µmol m-2 s-1 at 25 °C
  • Far-red Light: 0 – 20 µmol m-2 s-1 at 25 °C

Full Specifications

CO2 Gas Analyzer

  • Type: Absolute non-dispersive infrared gas analyzer
  • Measurement Range: 0 – 3100 µmol mol-1
  • Precision (signal noise) RMS 4-second signal averaging at 400 µmol mol-1: ≤0.1 µmol mol-1
  • Accuracy: Within 1% of reading at 200 µmol mol-1 or above, ±2 µmol mol-1 at < 200 µmol mol-1
  • Orientation Sensitivity: ≤±1 µmol mol-1 variation at 400 µmol mol-1 from any orientation

H2O Gas Analyzer

  • Type: Absolute non-dispersive infrared gas analyzer
  • Measurement Range: 0 – 75 mmol mol-1
  • Precision (signal noise) RMS 4-second signal averaging at 400 µmol mol-1: ≤0.01 mmol mol-1
  • Accuracy: Within 1.5% of reading at >5 mmol mol-1; ±0.08 mmol mol-1 at < 5 mmol mol-1

Temperatures

  • Operating Temperature Range: 0 – 50 °C
  • Storage Temperature Range: -20 – 60 °C
  • Temperature Control Range:
    • Leaf Temperature: ±10 °C from ambient
    • Setpoint Resolution: 0.1 °C
  • Chamber exhaust air temperature and temperature control block:
    • Type: Thermistor
    • Range: -10 – 60 °C
    • Accuracy: ±0.15 °C
  • Leaf temperature sensor:
    • Type: Type E fine-wire thermocouple
    • Sensitivity Range: -10 – 60 °C
    • Accuracy: <±0.5 °C total; ±0.2 °C cold junction reference; ±0.3 °C thermocouple when within ±10 °C of cold junction temperature

Communication

  • RJ-45 Ethernet; IP/TCP for networks and computers: 1
  • Head Donnections: 2
  • Accessory Connections: 2

Air Flow Rates

  • Bulk Flow Rate: 680 – 1700 µmol s-1 at SATP1
  • Leaf Chamber Flow Rate: 0 – 1400 µmol s-1 at SATP

Pressure

  • Console Pressure Sensor:
    • Operating Range: 50 – 110 kPa
    • Accuracy: ±0.4 kPa
    • Resolution: 1.5 Pa typical
    • Signal Noise: ≤0.004 kPa peak-to-peak with 4-second signal averaging
  • Chamber Pressure Sensor:
    • Range: -2 – 2 kPa
    • Resolution: <1 Pa typical
    • Signal Noise: 1 Pa peak-to-peak with 4-second signal averaging
    • Setpoint Resolution: 1.0 Pa
    • Control Range: 0 – 0.1 kPa (dependent on flow rate through the chamber)

Batteries

  • Weight: 0.435 kg
  • Capacity: 6800 mAh
  • Type: Lithium Ion
  • Storage: -20 – 60 °C; ≤80% RH

CO2 Control

  • CO2 Control Range: 0 – >2000 µmol mol-1 (with pump set to low; dependent on bulk flow rate)
  • CO2 Cartridge Type: 8 gram
  • Cartridge Lifetime: >8 hours after puncture (dependent on setpoint)
  • CO2 Scrubber: Soda lime

H2O Control

  • H2O Control Range: 0 – 90% RH (noncondensing)
  • Humidifier Substrate: Pall Stuttgarter Masse ceramic substrate (Pall Corporation)
  • Desiccant: Silica Gel (BASF Sorbead® Orange CHAMELEON®)

Light Measurement

  • Chamber and light source PAR sensors:
    • Sensitivity Range: 0 – 3000 µmol m-2 s-1
    • Resolution: <1 µmol m-2 s-1
    • Calibration Accuracy: ±5% of reading; Traceable to the U.S. National Institute of Technology (NIST)
  • External LI-190R PAR Sensor:
    • Detector: Silicon photodiode
    • Sensitivity: 5 – 10 µA per 1000 µmol s-1 m-2
    • Calibration Accuracy: ±5% of reading; Traceable to NIST

Console

  • Processor: 800 MHz ARM® Cortex™ A8
  • Memory: 512 MB RAM; 8 GB Flash memory
  • Display: Sunlight-readable TFT LCD with capacitive touch screen
  • Resolution: 1024 x 600 pixels
  • Dimensions: 26 cm diagonally
  • Size: 18.5 x 27.5 x 21 cm; (D x W x H)
  • Weight: 6.1 kg
  • Power Requirements: 12 – 18 VDC or 24 VDC

Head

  • Size with 3x3 cm Clear Leaf Chamber: 37 x 11.5 x 21.6 cm (L x W x H)
  • Weight: 2.15 kg without chamber
  • Display Resolution: 128 x 128 pixels
  • Display Dimensions: 3.15 cm corner-to-corner
  • Head Inputs
    • Leaf Temperature Thermocouple: 2
    • LI-190R Light Sensor: 1
  • Head Light Source connections: 1

Aquatic Chamber

    Sample Cuvette:

    • Wetted Materials: 316 stainless, float glass, Viton, PTFE, silicone, acetal
    • Cuvette Working Volume: 0 – 20 mL, 15 mL recommended sample volume

    CO2 Gas Analyzer:

    • Operating Principle: Non-dispersive Infrared (NDIR)
    • Measurement Range: 0 – 3100 µmol mol-1
    • Precision (1-sigma) @ 4 Second Averaging @ 400 µmol mol-1: < 0.1 µmol mol-1
    • Accuracy: 1% of reading at > 200 µmol mol-1, +/- 2 µmol mol-1 at < 200 µmol mol-1

    CO2 Control:

    • Range: 0-2,000 µmol mol-1
    • Support for custom gas blends through external fittings on the air supply

    Fluorometer (6800-01A):

    • Red/Blue Actinic Light Output: 0 – 3000 µmol m-2 s-1
    • Far-red Light Output: 0 – 20 µmol m-2 s-1
    • Saturation Flash Intensity: 0 – 16,000 µmol m-2 s-1
    • Red Actinic Peak Wavelength: 625 nm
    • Blue Actinic Peak Wavelength: 475 nm
    • Far-red Peak Wavelength: 735 nm

    Temperature:

    • Operating Temperature: 0 to 50 °C with no solar load (non-freezing)
    • Storage Temperature: -20 to 60 °C with chamber clean and dry
    • Temperature Control: User provided water bath. #10-32 threaded connections to chamber.

    Operating Fluid Environment:

    • Temperature: non-freezing to 50 °C
    • Salinity: 0 – 35 %

    Auxiliary Ports:

    • pH (probe not included): 12 mm diameter O-ring sealed port and integrated amplifier. Passive glass-electrode based pH probe, with BNC connector (nominal -59 mV/pH slope, user calibrated).
    • Septa: Silicone-PTFE septa

Clear-top Chamber

  • Maximum Leaf Area: 9 cm2
  • Size: 15.4 x 11.5 x 5.9 cm (L x W x H)
  • Weight: 0.3 kg

Small Light Source

  • Total Output Range: 0 – >2000 µmol m-2 s-1 at 25 °C
  • Blue Output Range: 0 – >400 µmol m-2 s-1 at 25 °C
  • Red Output Range: 0 – >1600 µmol m-2 s-1 at 25 °C
  • Red Peak Wavelength: 660 nm
  • Blue Peak Wavelength: 453 nm
  • Uniformity:
    • ±10% Over 90% of the aperture with white top gasket, typically
    • ±10% Over 77% of the aperture with black gasket, typically
  • Power Consumption: 2000 µmol m-2 s-1 <5 watts
  • Operating Temperature Range: 0 – 50 °C
  • Size: 6.6 x 5.9 x 5.8 cm (L x W x H)
  • Weight: 0.21 kg

Large Light Source

  • Total Output Range: 0 - >2500 µmol m-2 s-1 at 25 °C
  • Blue Output Range: >2000 µmol m-2 s-1 at 25 °C
  • Green Output Range: >1000 µmol m-2 s-1 at 25 °C
  • Red Output Range: >2400 µmol m-2 s-1 at 25 °C
  • White Output Range: >1500 µmol m-2 s-1 at 25 °C
  • Blue Peak Wavelength: 453 nm
  • Green Peak Wavelength: 523 nm
  • Red Peak Wavelength: 660 nm
  • White Color Temperature: 4000 K
  • Uniformity: ±10% over 90% of the aperture
  • Power Consumption: 15 W at 2000 µmol m-2 s-1 equal parts red, green, blue, and white
  • Operating Temperature Range: 0 – 50 °C
  • Operating Relative Humidity Range: 0 – 85%
  • Size: 11.7 × 11 × 13 cm (L × W × H)
  • Weight: 0.54 kg

Small Plant Chamber

  • Chamber Volume: 193.2 cm3 (internal volume)
  • Internal Dimensions: 7 cm diameter; 4.46 cm deep
  • External Dimensions: 8.4 cm wide (chamber block) × 12.7 cm long (chamber manifold interface to tip of chamber) × 6.47 cm (bottom of chamber manifold to top of chamber)
  • Weight: 0.60 kg

Custom Chamber Adapter

  • Chamber Volume: 34.2 cm3 (internal volume)
  • External Dimensions: 1.25 × 7.67 × 5.85 cm (L × W × H)

Insect Respiration Chamber

  • Chamber Volume: 49.9 cm3 (not including tubing)
  • Exterior Dimensions: 11.25 cm length; 3 cm diameter
  • Weight: 0.07 kg

Multiphase Flash™ Fluorometer

  • Modulated Light: Software controlled and software selectable frequencies of 1 Hz – 250 kHz
  • Measuring Light Peak Wavelength: 625 nm
  • Red Actinic and Saturating Flash Peak Wavelength: 625 nm
  • Blue Actinic Peak Wavelength: 475 nm
  • Far-red Peak Wavelength: 735 nm
  • Actinic Light Output:
    • 0 – 3000 µmol m-2 s-1 total at 25 °C
    • 0 – 1000 µmol m-2 s-1 blue at 25 °C
    • 0 – 2000 µmol m-2 s-1 red at 25 °C
  • Saturation Light: Software controlled intensity; 0 – 16,000 µmol m-2 s-1 at 25 °C
  • Far-red Light: Software controlled intensity; 0 – 20 µmol m-2 s-1 at 25 °C
  • Fluorescence Signal Temperature Dependence: -0.25% per °C
  • Uniformity:
    • <±10% over 92% of the aperture with white top gasket
    • <±10% over 90% of the aperture with black top gasket
  • Power Consumption:
    • <18 W at 25 °C with 3000 µmol m-2 s-1 actinic light
    • <60 W at 25 °C with 16,000 µmol m-2 s-1 saturating flash
  • Leaf Area: 6 cm2 or 2 cm2; Round apertures
  • Size: 16.6 x 11.5 x 13.6 cm (L x W x H)
  • Weight: 0.86 kg

Large Leaf and Needle Chamber

  • Maximum Leaf Area: 36 cm2
  • External Dimensions: 11.5 cm wide (spring to spring) x 16.8 cm long (front of chamber to back of chamber link) x 5.9 cm tall (bottom of chamber manifold to top of chamber)
  • Weight: 0.35 kg

Large Leaf and Needle Chamber with Conifer Sprig Blocks

  • Maximum Planar Leaf Area: 36 cm2
  • Internal Chamber Height: 6.7 cm
  • External Dimensions: 11.5 cm wide (spring to spring) x 16.8 cm long (front of chamber to back of chamber link) x 7.2 cm tall (bottom to top of chamber)
  • Volume: 25.68 in3 or 420.8 cm3

Bryophyte Chamber

    • Chamber Volume: 193.2 cm3 (internal volume)
    • Internal Dimensions: 7 cm diameter; 4.45 cm deep
    • External Dimensions: 8.4 cm wide (chamber block) × 12.7 cm long (chamber manifold interface to tip of chamber) × 6.47 cm (bottom of chamber manifold to top of chamber)
    • Weight: 0.60 kg

    Soil CO2 Flux Chamber

    • Chamber Volume: 4244.1 cm3
    • IRGA Volume: 57 cm3
    • Soil Area: 317.8 cm2 (49.3 in2)
    • Air Temperature Thermistor:
      • Operating Range: -20 to 45 °C
      • Accuracy: ±0.5 °C over 0 °C to 70 °C
    • Weight: 4.06 kg
  1. SATP is defined as Standard Ambient Temperature (25 °C) and Pressure (100 kPa).

Specifications subject to change without notice.

Ordering

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