Plant & Soil > Chlorophyll Fluorescence & Content > Z955 N-Pen

Z955 N-Pen

Starting from $1,020

The Z955 N- Pen is a light-weight, battery-powered PlantPen that can be used for nondestructive in vivo measurements of N content in plants.  It is ideal for effective  nitrogen management in plants throughout their growing season. The N-Pen measures reflectance of light at 565 and 760 nm and calculates NDGI (normalized difference greeness index) from which total N content (%) is determined. It is rugged and compact and ideal for use in the field, plant biology lab or in teaching plant biology.

N-Pen Applications:

  • Monitoring relative N-content of crops.
  • Better nitrogen management in crops and consequent yield enhancement.
  • monitoring of  nitrogen use efficiency.
  • management of fertilizer applications
  • Agronomy research.

N-Pen Sampling

  • Simply insert the leaf between the leaf clip and the optical tip.
  • N-Pen collects and stores individual readings and calculates the average automatically.
  • Readings should be taken on number of different plants of the same species.
  • Readings should be taken on the 2nd or 3rd youngest leaf on each plant.
  • Readings should be taken from the same location on each leaf (close to the mid part)

N-Pen Reading

  • Displayed is the NDGI ratio and the actual % nitrogen for wheat, barley and corn, or relative numbers for other species.
  • Nitrogen content in % is calibrated for particular species (wheat, barley and corn calibrations come standard with the N-pen)
  • Calibrations for other plant species available soon
  • Variety or hybrid differences can affect readings
  • Plant diseases, nutrient deficiencies and other kinds of plant stress can also affect readings

Software:

  • FluorPen 1.0 software (optional)
  • Bluetooth, USB or serial communication (optional)
  • GPS mapping plug-in (optional)
  • Export to Microsoft Excel (optional)

Specifications:

  • Measured Parameters: NDGI = (R760-R565)/(R760+R565) and Nitrogen content in % calibrated for particular plant (wheat, barley and corn) or relative content for other species
  • Measuring Light: Dual wavelength light source (565 nm, 760 nm)
  • Detector Wavelength Range: 500 to 800 nm bandpass filters
  • Memory Capacity: Up to 4 Mb
  • Internal Data Logging: Up to 100,000 data points
  • Display: 2 x 8 characters LCD
  • 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: 120 x 57 x 30 mm (4.7 x 2.2 x 1.2″)
  • Weight: 180 g (6.5 oz)
  • 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

References:

  • Klem K. (2008): Prediction of spring barley nutrition state and grain quality using spectral reflectance and chlorophyll fluorescence. Precision Agriculture – ICPA 2008.