PlantPen NDVI & PRI

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 1.2 software provides data transfer routines and many additional features for data presentation in tables and graphs.

Rugged and compact device

Easy-to-use two-button operation

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 531 nm and 570 nm. PRI is sensitive to changes in carotenoid pigments that are indicative of changes in photosynthetic light use efficiency, the rate of CO 2 uptake and as a reliable water-stress index. As such, it is used in studies of vegetation productivity and stress.

The PlantPen model 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

Fast screening of photosynthetic pigments

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

Normalized Difference Vegetation Index (NDVI)

PRI (Photochemical Reflectance Index)

SOFTWARE FluorPen 1.2 software (Windows 7 or higher compatible) Bluetooth and USB communication Visualization and data transfer routines to Microsoft Excel (optional) GPS mapping

FluorPen 1.2 software (Windows 7 or higher compatible)

Bluetooth and USB communication

Visualization and data transfer routines to Microsoft Excel (optional)

PlantPen PRI 210 - measures Photochemical Reflectance Index (PRI) by comparing leaf reflectance 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 changes in photosynthetic light use efficiency, the rate of CO 2 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.

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).