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Portable Photosynthesis System

Available on backorder

Features:

When you change the leaf chamber environment—light, temperature, CO2, or H2O—the instrument adjusts to the new setpoint right away thanks to Rapid Sensing™ Technology. The fast adjustment saves time and enables you to measure a plant’s response to rapidly changing conditions.

Capable of achieving 10°C below and above ambient temperature, the LI-6800 provides fast and precise temperature control. It can control temperature at a setpoint, track the ambient temperature, or ramp the temperature up or down according to your experimental requirements.

The precise control of CO2 allows for faster measurements, so you can perform rapid A-Ci response curves with the Rapid A-Ci Response (RACiR™) Method (Pat. Pend.).

A unique, durable fine-wire thermocouple maintains direct contact with the leaf—to get the actual leaf temperature with every measurement.

Providing full control over water vapor, the LI-6800 can maintain humidity at any level below condensing conditions in the leaf chamber and gas analyzers.

User-adjustable flow rates—from 0 to 2.5 liters per minute—minimize response times and expand the system versatility.

A gas input port enables you to subject the leaf to custom gas blends.

To fill the chamber area—and easily calculate leaf area—swap in one of several interchangeable inserts for different leaf area apertures on the Clear-top chamber and on the Multiphase Flash fluorometer.

 

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 3×3 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

Catalogue: PDF

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Portable Photosynthesis System

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