Home > Products > Pocket-Sized Instruments >

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. The pigment in plant leaves - chlorophyll - strongly absorbs visible light (from 0.4 to 0.7 μm) for use in photosynthesis. The cell structure of leaves, on the other hand, strongly reflects near-infrared light (from 0.7 to 1.1 μm). The differences in plant reflectance in the visible and near-infrared wavelengths are used to calculate NDVI index. NDVI is directly related to the photosynthetic capacity and hence energy absorption of plant canopies.
  • PlantPen PRI 200 & NDVI 300

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 incorporate PC connectivity (Bluetooth or USB) and FluorPen 1.0 software provides visualization and data transfer routines to a computer and many additional features for data presentation in tables and graphs.

  • Rugged and compact device
  • Easy-to-use two-button operation
  • Fast and quickly repeatable results
  • Comprehensive software for data processing
  • USB or Bluetooth communication for data transfer
  • PlantPen PRI 200 & NDVI 300
  • Photosynthesis research and education
  • Plant biology
  • Plant screening & field studies
  • Stress physiology
  • Agronomy & forestry
  • PlantPen PRI 200 & NDVI 300
  • 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
  • PlantPen PRI 200
  • 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 LED light source 530 nm and 590 nm
    NDVI: Internal dual wavelength LED light source 535 nm and 560 nm
  • Detector Wavelength Range:
    PRI: PIN photodiode with 500 to 600 nm bandpass filters
    NDVI: PIN photodiode with 620 to 750 nm bandpass filters
  • Optical Aperture Diameter:
    5 mm
  • Wavelength Tolerance:
    ± 5 nm
  • FluorPen/PlantPen 1.0 Software:
    Windows 2000, XP, or higher*
  • Memory Capacity:
    Up to 16 Mb
  • Display:
    2 x 8 characters LC display
  • Keypad:
    Sealed, 2-key tactile response
  • Keypad Escape Time:
    Turns off after 8 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
  • CALDERÓN R., LUCENA C., TRAPERO-CASAS J. L. ET. AL. (2014): Soil temperature determines the reaction of olive cultivars to Verticillium dahliae pathotypes. PLoS One. Volume 9. DOI:10.1371/journal.pone.0110664
  • CALDERÓN, R., ZARCO-TEJADA, P.J., LUCENA, C. ET AL. (2013): High-resolution airborne hyperspectral and thermal imagery for pre-visual detection of Verticillium wilt using fluorescence, temperature and narrow-band indices, Remote Sensing of Environment. Volume 139 Pages, 231-245. DOI:10.1016/j.rse.2013.07.031
  • ZARCO-TEJADA P.J., GUILLEN-CLIMENT M.L., HERNANDEZ-CLEMENTE R. ET AL. (2013): Estimating leaf carotenoid content in vineyards using high resolution hyperspectral imagery acquired from an unmanned aerial vehicle. Agricultural and Forest Meteorology 171-172. Pages. 281-294. DOI:10.1016/j.agrformet.2012.12.013
  • JUPA R., HÁJEK J., HAZDROVÁ J. ET AL. (2012): Interspecific differences in photosynthetic efficiency and spectral reflectance in two Umbilicaria species from Svalbard during controlled desiccation. Czech Polar Reports, Brno, Volume 2, Pages 31-41. DOI: 10.5817/CPR2012-1-4
  • KOVÁR, M., VEVERKOVÁ, E. AND ČERNÝ, I. (2012): Utilization of Enfrared Thermography and Leaf Reflectance Indices in Evaluation of Effects of the Treatment of Sunflower (Helianthus annuus L.) by Biologically Active Compounds. Acta fytotechnica et zootechnica. Volume 15, Pages 23-28
  • SHRESTHA S., BRUECK H. AND ASCH F. (2012): Chlorophyll index, photochemical reflectance index and chlorophyll fluorescence measurements of rice leaves supplied with different N levels. Journal of Photochemistry and Photobiology B: Biology. Volume 113, Pages 7–13. DOI:10.1016/j.jphotobiol.2012.04.008
  • ZARCO-TEJADA P.J., GONZALES-DUGO V. AND BERNI J.A.J. (2012): Fluorescence, temperature and narrow-band indices acquired from a UAV platform for water stress detection using a micro-hyperspectral imager and a thermal camera. Remote Sensing of Environment. Volume, 117. Pages 322-337. DOI:10.1016/j.rse.2011.10.007
  • CHYTYK, C. J., HUCL, P. J. AND GRAY, G. R. (2011): Leaf photosynthetic properties and biomass accumulation of selected western Canadian spring wheat cultivars. Canadian Journal of Plant of Science. Volume 91, Pages 305-314. DOI: 10.4141/CJPS09163

Pricing

  • Orders and Payments
  • PlantPen PRI 200
    999,- €
  • PlantPen NDVI 300
    799,- €
  • PlantPen PRI 200/BT
    1.649,- €
  • PlantPen PRI 200/USB
    1.499,- €
  • PlantPen NDVI 300/BT
    1.449,- €
  • PlantPen NDVI 300/USB
    1.299,- €
  • Mini-Computer *
    390,- €
  • Substitute USB Communication Cable *
    39,- €
  • GPS Module *
    249,- €
  • Battery Charger *
    49,- €
  • Self-Adhesive Rubber Pads
    12,- €

PlantPen Versions

PlantPen PRI 200
Standard PRI version with no communication module and no data transfer to a PC. Data are stored in the device internal memory only.


PlantPen NDVI 300
Standard NDVI version with no communication module and no data transfer to a PC. Data are stored in the device internal memory only.


PlantPen PRI 200-B
Standard PRI version supplemented by the Bluetooth communication module and FluorPen 1.0 software for data transfer to a PC.


PlantPen PRI 200-U
Standard PRI version supplemented by the USB communication module and FluorPen 1.0 software for data transfer to a PC.


PlantPen NDVI 300-B
Standard NDVI version supplemented by the Bluetooth communication module and FluorPen 1.0 software for data transfer to a PC.


PlantPen NDVI 300-U
Standard NDVI version supplemented by the USB communication module and FluorPen 1.0 software for data transfer to a PC.


Inquire at: info@psi.cz for other custom-made PlantPens with different structural or chlorophyll indices.

Optional Features and Accessories

Mini-Computer
Small, portable notebook (type according to current availability on the market).


Substitute USB Communication Cable
Substitute USB cable allowing connection between the "pen" devices and a PC (the device is delivered with one USB cable, which is included in the device price).


GPS Module
To record the exact location of the measurements performed by the pen-category instruments.


Battery Charger
Includes battery charger and 4 AAA alkaline rechargeable batteries. EU norm only.


Self-Adhesive Rubber Pads
One set includes 10 solid pads (to be attached to the clip) and 10 pads with an opening (to be attached at the optical head).

Download

Software
FluorPen 1.0
OS: Windows 2000 / Windows XP / Windows 7 (32bit, 64bit) / Windows 8 (32 bit, 64bit)/ Windows 10 (32 bit, 64bit),
Language: English
Size: 11.1 MB


SpectraPen_PolyPen 1.0.0.7
OS: Windows 7 (32bit, 64bit) and higher
Language: English
Size: 901 KB


SpectraPen Installer
OS: Windows 7 (32bit, 64bit) and higher
Language: English
Size: 795 KB


USB Driver for Pen Devices
OS: Windows
Language: English
Size: 2.3 MB


Documents
FluorPen Series Manual
Type: PDF
Language: English
Size: 4.7 MB


FluorPen - List of References
Type: PDF
Language: English
Size: 904 KB


FluorPen Explain
Type: PDF
Language: English
Size: 2.8 MB


SpectraPen SP 100 Manual
Type: PDF
Language: English
Size: 1.4 MB


SpectraPen SP 100 - List of References
Type: PDF
Language: English
Size: 131 KB


SpectraPen LM 500 Manual
Type: PDF
Language: English
Size: 2.9 MB


PolyPen Manual
Type: PDF
Language: English
Size: 2.2 MB


PolyPen - List of References
Type: PDF
Language: English
Size:


AquaPen Manual
Type: PDF
Language: English
Size: 4.1 MB


AquaPen Manual (Czech)
Type: PDF
Language: English
Size: 4.0 MB


AquaPen - List of References
Type: PDF
Language: Czech
Size: 1.1 MB


LaiPen Manual
Type: PDF
Language: English
Size: 2.0 MB


LaiPen - List of References
Type: PDF
Language: English
Size: 135 KB


N-Pen Brief Guide
Type: PDF
Language: English
Size: 104 KB


N-Pen - List of References
Type: PDF
Language: English
Size:


PlantPen NDVI-PRI Operation Manual
Type: PDF
Language: English
Size: 2.7 MB


PlantPen - List of References
Type: PDF
Language: English
Size: 181 KB


Other Pocket-Sized-Instruments

FluorPen FP 100

FluorPen is a hand-held fluorometer that measures chlorophyll fluorescence parameters in a fully automated and rapid manner.
Applications:
- Photosynthesis Research & Education
- Large plant screening programs
- Agriculture & Forestry
- Biotechnology


PAR-FluorPen FP 100-MAX-LM

PAR-FluorPen is used to measure fluorescence and Photosynthetic Photon Flux Density (PPFD) of photosynthetically active radiation (PAR).
Applications:
- Photosynthesis Research & Education
- Plant & Molecular Biology
- Agriculture & Forestry
- Biotechnology


Monitoring Pen MP 100

Monitoring Pen is a robust and weather-proof version of the popular FluorPen that is intended for unattended use in a field.
Applications:
- Photosynthesis Research & Education
- Long-Term, Autonomous Fluorometry Experiments


AquaPen-C AP-C 100

AquaPen-C is a new cuvette version of the popular FluorPen fluorometer. It is optimized for measuring chlorophyll fluorescence in green algae and cyanobacteria. AquaPen sensitivity 500 ng Chl/l enables measuring in natural water.
Applications:
- Photosynthesis Research & Education
- Biotechnology
- Limnology & Oceanography


AquaPen-P AP-P 100

AquaPen-P is equipped with a submersible optical probe. It suits investigations in algal suspensions and natural waters. AquaPen sensitivity: 500 ng Chl/l.
Applications:
- Photosynthesis Research & Education
- Phycology
- Limnology & Oceanography
- Biotechnology


SpectraPen LM 500

SpectraPen with precise radiometric calibration and integrated cosine corrector. Number of formulas and calculated parameters: PAR, Watt, Lux, Lumen, CIE color coordinates, color rendering indexes, color temperatures.
Applications:
- Light Characteristics Measurements
- Light Source Testing and Quality Control
- Color Measurement


SpectraPen SP 100

SpectraPen is a handheld, programmable spectrophotometer that provides instant readings and spectral lines on interactive touch screen.
Applications:
- Visible Light Source Testing
- Color Measurement
- Chemical Measurement


PolyPen RP 400

PolyPen RP 400 is a complete system for measurement of spectral reflectance on flat leaves as well as measurements of transmittance and absorbance of any external light source. Integrated software is capable of automatic calculation of all common vegetation indices.


PlantPen PRI 200 & NDVI 300

PlantPen is a low-cost, handheld device that characterizes plants by means of reflectance. The two standard versions measure PRI and NDVI.
Applications:
- Photosynthesis Research & Education
- Vegetation Productivity
- Vegetation Stress Studies
- Agriculture


N-Pen N 100

N-Pen is a light-weight, battery-powered instrument that provides quick measurement of actual nitrogen content in plants throughout their growing season.
Applications:
- Significant Yield Increase
- Quick Tuning of Nitrogen Management in Crops
- Saving Nitrogen Application Costs


LaiPen LP 100

LaiPen is a light-weight, battery-powered device that mesures Leaf Area Index (LAI) and Photosynthetically Active Radiation (PAR). It provides fast and easily repeatable measurements with instant readouts that can be exported to a PC for further processing.
Applications:
- Studies of Canopy Productivity
- Studies of Forest Dynamism
- Remote Sensing


Video Gallery