Z970 PolyPen

Z970 PolyPen is designed for measurement of spectral reflectance of an internal light source (Xenon incandescent lamp 380 – 1050 nm) from leaves.  Spectral reflectance measurements at specific wavelengths are used to calculate reflectance indices such as NDVI, NDGI, PRI, Greenness Index, etc by the software of the PolyPen. Measured data are instantly displayed in graphs or data sheets on the device screen display. They are also stored in the device memory for later re-collection or transfer onto a PC.

PolyPen is a self-contained device that runs on Li-Ion rechargeable battery and does not require any external PC. It features an innovative user interface with integral computer, full color touch screen display, built-in light source, and a sample holder – non-destructive leaf clip and built in GPS module. Collected data may be transferred to a PC computer via USB or Bluetooth connection. The device is delivered with a Spectralon standard (spectrally flat over UV-VIS-NIR spectrum and optically flat to +/- 1 % over the photopic region of the spectrum) for quick and simple calibration of the detector and full software package. Two versions of the Z970 PolyPen are available:

Z970-UV/Vis with Spectral response range: 380 to 780 nm

Z970-NIR with Spectral response range: 640 to 1050 nm

  • Complete system for measurement of spectral reflectance from leaves
  • Pre-programmed calculation of all commonly used reflectance indices
  • Custom indices calculation possible
  • Intuitive touch-screen operation
  • Integrated light source (Xenon incandescent lamp 380 – 1050 nm)
  • Leaf clip sample holder for non-destructive measurements
  • USB and BT connectivity for data download
  • Li-ion rechargeable battery via USB connection
  • Integrated GPS module
  • No PC required for operation
  • Handheld and lightweight
  • Photosynthesis Research
  • Plant Screening
  • Environmental Monitoring
  • Greenhouse and Field Studies
  • Biotic and Abiotic Stress Research
  • Agriculture and Horticulture
  • Plant phenotyping/screening
  • Nitrogen content, water status, pigment compostion studies

Light Source: Xenon incandescent lamp 380-1050 nm

Spectral Response Range: 380 nm – 790 nm or 640 nm – 1050 nm

Spectral Response Half Width: 8 nm

Spectral Straylight: -30 dB

Size of Aperture: 7 mm

Scanning Speed: About 100 ms

Touch Screen: 240 x 320 pixel; 65535 colors

Memory Capacity: 32 Mbit (up to 8000 measurements)

System Data: 16 bit AD conversion

Dynamic Range: High gain: 1:4300; Low gain: 1:13000

Communication: USB and BT

Dimension / Weight: 15 x 7.5 x 4 cm / 300 g

Case: Splash-proof

Battery: Li-Ion; rechargeable via USB port of a PC

Warranty: 1 year

  • Normalized Difference Vegetation Index (NDVI) Reference: Rouse et al. (1974) Equation: NDVI = (RNIR – RRED ) / (RNIR + RRED )
  • Simple Ratio Index (SR) Reference: Jordan (1969); Rouse et al. (1974) Equation: SR = RNIR / RRED
  • Modified Chlorophyll Absorption in Reflectance Index (MCARI1) Reference: Haboudane et al. (2004) Equation: MCARI1 = 1.2 * [2.5 * (R790– R670) – 1.3 * (R790– R550)]
  • Optimized Soil-Adjusted Vegetation Index (OSAVI) Reference: Rondeaux et al. (1996) ) Equation: OSAVI = (1 + 0.16) * (R790– R670) / (R790– 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 = (R790 – R680) / (R790 + R680); Lic2 = R440 / R690
  • Structure Intensive Pigment Index (SIPI) Reference: Peñuelas et al. (1995) Equation: SIPI = (R790– R450) / (R790+ R650)
  • Gitelson and Merzlyak Indices Reference: Gitelson & Merzlyak (1997) Equation: GM1 = R750/ R550; GM2 = R750/ R700)
  • Aigar Niglas, Kaisa Papp, Maciej Sękiewicz., et al. (2017).Tree Phys. 37. DOI: 10.1093/treephys/tpx087
  • Ashrafuzzaman M., Lubna F. A., Holtkamp F., et al. (2017). Environmental Pollution. 230. DOI:10.1016/j.envpol.2017.06.055.
  • López-López M., Calderón R., González-Dugo V., et l . (2016). Remote Sens. 8. DOI:10.3390/rs8040276
  • Zarco-Tejada P.J., González-Dugo M.V. and Fereres E. (2016). Remote Sens. Environ. 179: 89–103.DOI: 10.1016/j.rse.2016.03.024
  • Ptusshenko V. V., Avercheva O. V., Bassarskaya E. M. et al. (2015). Sci. Hortic. 194: 267-277. DOI:10.1016/j.scienta.2015.08.021
  • Ptushenko V.V., Ptushenko O.S. and Tikhonov A.N. (2014). Biochem. (Mosc) 79 (3): 260-272. DOI:10.1134/S0006297914030122

Software

  • Automatic calculation of all commonly used reflectance indices
  • Calculation of custom indices optional
  • Instant data graphs and data sheets
  • Export to a PC via USB or BT communication
  • GPS mapping module
  • Future firmware updates

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