PlantPen NDVI & PRI
Quick, reliable and easy measurements in the field or laboratory
About...

PSI's PlantPen is a reflectance-based device that provides a convenient, low-cost method of measuring the relative chlorophyll content of attached or detached leaves. PlantPens are hand-held, battery-powered devices that help to characterize plants by means of reflectance. PlantPens measure and calculate specific reflectance indices to monitor chlorophyll content, photoprotecting carotenoids, and other important aspects of live foliage. Two standard PlantPen versions measure the most common indexes: Photochemical Reflectance Index (PRI) and Normalized Difference Vegetation Index (NDVI.). Comprehensive FluorPen 1.1 software provides data transfer routines and many additional features for data presentation in tables and graphs.

Key Features

  • Rugged and compact device
  • Easy-to-use two-button operation
  • Integrated GPS module


  • Comprehensive software for data processing
  • USB and Bluetooth communication for data transfer
  • Li-ion rechargeable battery via USB port of a PC

PlantPen PRI 210 and PlantPen NDVI 310

PlantPen is a reflectance-based device that provides a convenient, low-cost method of measuring the relative photosynthetic pigments content of a leaf sample. PlantPens measure and calculate particular reflectance indices to assess chlorophyll content, photoprotecting carotenoids, and other important features in live foliage. Two standard PlantPen versions measure the most common indexes:Photochemical Reflectance Index (PRI)and Normalized Difference Vegetation Index (NDVI). Measured data are sequentially stored in the internal FluorPen memory. Comprehensive FluorPen 1.1 software provides data transfer routines and many additional features for data presentation in tables and graphs.

The PlantPen model PRI 210 measures Photochemical Reflectance Index (PRI) by comparing leaf reflectance in two narrow wavelength bands centered close to 530 nm and 590 nm. PRI is sensitive to changes in carotenoid pigments that are indicative of changes in photosynthetic light use efficiency, the rate of CO2 uptake and as a reliable water-stress index. As such, it is used in studies of vegetation productivity and stress.

The PlantPenmodel NDVI 310 measures Normalized Difference Vegetation Index (NDVI), which is an important indicator of chlorophyll content in plants. 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 the 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.


APPLICATIONS


  • Fast screening of photosynthetic pigments
  • Early stress detection
  • Nutrition effects
  • Field studies
  • Agronomy & forestry

PLANTPENS MEASURE


  • Normalized Difference Vegetation Index (NDVI)
  • NDVI = (RNIR – RRED ) / (RNIR + RRED )
  • PRI (Photochemical Reflectance Index)
  • PRI = (R530 – R590) / (R530 + R590)

SOFTWARE


  • FluorPen 1.1 software (Windows 7 or higher compatible)
  • Bluetooth and USB communication
  • Visualization and data transfer routines to Microsoft Excel (optional)
  • GPS mapping

Versions

PlantPen PRI 210 - measures Photochemical Reflectance Index (PRI) by comparing leaf reflectance in two narrow wavelength bands centered close to 530 nm and 590 nm. PRI is sensitive to changes in carotenoid pigments that are indicative of changes in photosynthetic light use efficiency, the rate of CO2 uptake and as a reliable water-stress index. As such, it is used in studies of vegetation productivity and stress.

PlantPen NDVI 310 - measures Normalized Difference Vegetation Index (NDVI), which is an important indicator of chlorophyll content in plants. 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 the 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.



Accessories

Control and Data Unit for Handheld Devices

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).

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).

Pricing


PlantPen
Version Characteristics Price
PlantPen NDVI 310 Standard version supplemented by the Bluetooth, USB communication,
GPS module and dedicated software for data collection and visualization.
1,599 €
PlantPen PRI 210 Standard version supplemented by the Bluetooth, USB communication,
GPS module and dedicated software for data collection and visualization.
1,799 €

Accessories

Replacement of the Battery
and Device Recalibration *
Replacement of the internal rechargeable battery
and the device recalibration.
450 €
Control and Data Unit
for Handheld Devices *
Small, portable notebook (type according to current availability on the market). 390 €
Self-Adhesive Rubber Pads for FluorPens 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).
30 €
Substitute USB
Communication Cable *
Substitute USB cable allowing connection between the "pen" devices and a PC
(the "pen" device is delivered with one USB cable).
39 €