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PlantPen PRI 200 & NDVI 300

PlantPen is a reflectance-based device that provides a convenient, low-cost method of measuring the relative chlorophyll content of a leaf sample. PlantPens measure and calculate particular reflectance indices to assess chlorophyll content, protoprotecting carotenoids, and other important features in live foliage. Two standard Plant Pen versions measure the most common indexes: PRI and NDVI.

• The PlantPen model PRI 200 measures Photochemical Reflectance Index in two narrow wavelength bands centered close to 531 nm and 570 nm. PRI is sensitive to changes in carotenoid pigments that are indicative of photosynthetic light use efficiency, the rate of carbon dioxide uptake, or as a reliable water-stress index. As such, it is used in studies of vegetation productivity and stress.
• The PlantPen model NDVI 300 measures Normalized Difference Vegetation Index, which is an important indicator of chlorophyll content in plants. The device compares reflected light at two distinct wavelengths, 660 and 740 nm.

Rugged and compact PlantPens can be favorably used in the field, in the plant biology lab or for education. A handy leaf clip, simple two-button operation, and a bright display make the PlantPen an easy-to-use instrument that does not disturb investigated plants (no leaf detaching or damaging). It takes four AAA alkaline batteries and is supplied in a robust case.

More sophisticated PlantPen models (PRI 200-B, PRI 200-S, PRI 200-U, NDVI 300-B, NDVI 300-S, NDVI 300-U) incorporate one of the three offered communication modules: Bluetooth, USB dongle, or serial cable. FluorPen 1.0 software provides visualization and data transfer routines to a computer.

Software:

• FluorPen 1.0 software (Windows 2000, XP, or higher compatible)*
• Bluetooth, USB or serial communication
• Visualization and data transfer routines to Microsoft Excel
• GPS mapping plug-in

Applications:

• Photosynthesis research and education
• Plant biology
• Plant screening & field studies
• Stress physiology
• Agronomy & forestry

Custom-Made Versions:

Besides the two standard models, we offer custom-made PlantPens that can measure other structural or chlorophyll indices. For more information inquire at: info@psi.cz.

Transport Case

Structural Indices:

• Normalized Difference Vegetation Index (NDVI)
  Reference: Rouse et al. (1974)
  Equation: NDVI = (R_NIR - R_RED ) / (R_NIR + R_RED )
  
• Simple Ratio Index (SR)
  Reference: Jordan (1969); Rouse et al. (1974)
  Equation: SR = R_NIR / R_RED
  
• Modified Chlorophyll Absorption in Reflectance Index (MCARI1)
  Reference: Haboudane et al. (2004)
  Equation: MCARI1 = 1.2 * [2.5 * (R₈₀₀- R₆₇₀) - 1.3 * (R₈₀₀- R₅₅₀)]
  
• Optimized Soil-Adjusted Vegetation Index (OSAVI)
  Reference: Rondeaux et al. (1996) )
  Equation: OSAVI = (1 + 0.16) * (R₈₀₀- R₆₇₀) / (R₈₀₀- R₆₇₀ + 0.16)
  

• Greenness Index (G)
  Equation: G = R₅₅₄ / R₆₇₇
  
• Modified Chlorophyll Absorption in Reflectance Index (MCARI)
  Reference: Daughtry et al. (2000)
  Equation: MCARI = [(R₇₀₀- R₆₇₀) - 0.2 * (R₇₀₀- R₅₅₀)] * (R₇₀₀/ R₆₇₀)
  
• Transformed CAR Index (TCARI)
  Reference: Haboudane et al. (2002)
  Equation: TSARI = 3 * [(R₇₀₀- R₆₇₀) - 0.2 * (R₇₀₀- R₅₅₀) * (R₇₀₀/ R₆₇₀)]
  
• Triangular Vegetation Index (TVI)
  Reference:Broge and Leblanc (2000)
  Equation: TVI = 0.5 * [120 * (R₇₅₀- R₅₅₀) - 200 * (R₆₇₀- R₅₅₀)]
  
• Zarco-Tejada & Miller Index (ZMI)
  Reference: Zarco-Tejada et al. (2001)
  Equation: ZMI = R₇₅₀ / R₇₁₀
  
• Simple Ratio Pigment Index (SRPI)
  Reference: Peñuelas et al. (1995)
  Equation: SRPI = R₄₃₀ / R₆₈₀
  
• Normalized Phaeophytinization Index (NPQI)
  Reference: Barnes et al. (1992)
  Equation: NPQI = (R₄₁₅- R₄₃₅) / (R₄₁₅+ R₄₃₅)
  
• Photochemical Reflectance Index (PRI)
  Reference: Gamon et al. (1992)
  Equation: PRI = (R₅₃₁- R₅₇₀) / (R₅₃₁+ R₅₇₀)
  
• Normalized Pigment Chlorophyll Index (NPCI)
  Reference: Peñuelas et al. (1994)
  Equation: NPCI = (R₆₈₀- R₄₃₀) / (R₆₈₀+ R₄₃₀)
  
• Carter Indices
  Reference: Carter (1994), Carter et al. (1996)
  Equation: Ctr1 = R₆₉₅ / R₄₂₀; Ctr2 = R₆₉₅ / R₇₆₀
  
• Lichtenthaler Indices
  Reference: Lichtenthaler et al. (1996)
  Equation: Lic1 = (R₈₀₀ - R₆₈₀) / (R₈₀₀ + R₆₈₀); Lic2 = R₄₄₀ / R₆₉₀
  
• Structure Intensive Pigment Index (SIPI)
  Reference: Peñuelas et al. (1995)
  Equation: SIPI = (R₈₀₀- R₄₅₀) / (R₈₀₀+ R₆₅₀)
  
• Gitelson and Merzlyak Indices
  Reference: Gitelson & Merzlyak (1997)
  Equation: GM1 = R₇₅₀/ R₅₅₀; GM2 = R₇₅₀/ R₇₀₀)
  

• Measured Parameters:
  PRI (Photochemical Reflectance Index)
  PRI = (R₅₃₁ - R₅₇₀) / (R₅₃₁ + R₅₇₀)
  NDVI (Normalized Difference Vegetative Index)
  NDVI = (NIR – VIS) / (NIR + VIS)
• Measuring Light:
  PRI: Internal dual wavelength light source R₅₃₁ = 531 nm, R₅₇₀ = 570 nm
  NDVI: Internal dual wavelength light source VIS = 660 nm, NIR = 740 nm
• Detector Wavelength Range:
  PRI: PIN photodiode with 500 to 600 nm bandpass filters
  NDVI: PIN photodiode with 620 to 750 nm bandpass filters
• FluorPen/PlantPen 1.0 Software:
  Windows 2000, XP, or higher*
• Memory Capacity:
  Up to 4 Mb
• Internal Data Logging:
  Up to 100,000 data points
• Display:
  2 x 8 characters LC display
• Keypad:
  Sealed, 2-key tactile response
• Keypad Escape Time:
  Turns off after 3 minutes of no use
• Power Supply:
  4 AAA alkaline or rechargeable batteries
• Battery Life:
  48 hours typical with full operation
• Low Battery Detection:
  Low battery indication displayed
• Size:
  170 x 57 x 30 mm; 6.7" x 2.2" x 1.2"
• Weight:
  180 g, 6.5 oz
• Operating Conditions:
  Temperature: 0 to 55 ºC; 32 to 130 ºF. Relative humidity: 0 to 95 % (non-condensing)
• Storage Conditions:
  Temperature: -10 to +60 ºC; 14 to +140 ºF. Relative humidity: 0 to 95 % (non-condensing)
• Warranty:
  1 year parts and labor

* Windows is a registered trademark of Microsoft Corporation