Z951 NDVI Pen

The Z951 NDVI-Pen is a hand-held battery-powered PlantPen that helps to characterize plants by means of reflectance. The Normalized Difference Vegetation Index (NDVI), an important indicator of chlorophyll content in plants, is calculated from measurements of reflected light at two distinct wavelengths, Red (660nm) and NIR (740 nm).

The Z951 NDVI-Pen is a rugged and compact device. It can be used in the field, in the laboratory or the greenhouse.  A handy leaf clip, simple two-button operation, and a bright LCD display make this PlantPen easy to use.  NDVI measurements are made noninvasively on intact plants (no leaf tearing or damaging).

  • Small hand-held instrument for leaf light reflectance measurements
  • User friendly, two button operation
  • Available in standard, Bluetooth or USB version
  • comprehensive software package avilable or PC with BT or USB version
  • Photosynthesis research and education
  • Plant biology
  • Plant screening & field studies
  • Stress physiology
  • Agronomy & forestry
  • Measured Parameters: NDVI (Normalized Difference Vegetative Index) = (R740 – R660) / (R740 + R660)
  • Measuring Light: Internal dual wavelength light source VIS = 635nm, NIR = 760nm
  • Detector Wavelength Range: PIN photodiode with 630 to 800 nm bandpass filters
  • FluorPen Software: Windows 2000, XP, or higher
  • Sample Holder:  Mechanical leaf clip
  • Bios: Upgradeable firmware
  • Communication: Bluetooth 1.1, USB dongle or seial port (optional)
  • Memory Capacity: Up to 4Mb
  • 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 5 minutes of no use
  • Power Save Mode: Autosleep
  • Power Supply: 4 AAA alkaline or rechargeable batteries
  • Battery Life: 70 hours typical with full operation
  • Low Battery Detection: Low battery indication displayed
  • Size: 57 x 30 x 120 mm
  • Weight: 180 g
  • Operating Conditions: Temperature: 0 to +55ºC; 32 to +130ºF Relative humidity: 0 to 95% (non-condensing)
  • Storage Conditions: Temperature: -10 to +60ºC; 14 to +140ºF Relative humidity: 0 to 95% (non-condensing)
  • Warranty: 1 year parts and labor
  • S. B. Phillips,* D. A. Keahey, J. G. Warren, and G. L. Mullins. NITROGEN MANAGEMENT Estimating Winter Wheat Tiller Density Using Spectral Reflectance Sensors for Early-Spring, Variable-Rate Nitrogen Applications. Agron. J. 96:591–600 (2004).
  • Michele Meroni, Micol Rossini, Valentina Picchi, Cinzia Panigada, Sergio Cogliati, Cristina Nali and Roberto Colombo.  Assessing Steady-state Fluorescence and PRI from Hyperspectral Proximal Sensing as Early Indicators of Plant Stress: The Case of Ozone Exposure
    Sensors 2008, 8, 1740-1754

Z951 NDVI Pen uses 4 x AAA alkaline batteries and is supplied in a robust case. The memory of Z951 NDVI-Pen has a capacity of 4 MB (up to 100,000 data points). Measured data are numbered and may be recalled on the LCD display in sequence later (standard model).  More sophisticated models incorporate Bluetooth or USB data transfer to a PC.  These models come with FluorPen software that allows data transfer, vusalization and export into spreadsheet programs.

Available Versions:

  • Z951 – NDVI Pen standard
  • Z951-USB – NDVI Pen with USB data transfer
  • Z951-BT – NDVI Pen with Bluetooth data transfer

Qubit offers other Plant Pens such as Z950 PRI Pen, Z955 N Pen and Z970 PolyPen.  Contact us to learn more