PlantPen NDVI & PRI
Quick, reliable and easy measurements in the field or laboratory
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.
PlantPen is a reflectance-based device that provides a convenient, low-cost method of measuring the relative chlorophyll content of a leaf sample. PlantPens hand-held, battery-powered devices that help to characterize plants by means of reflectance. 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.). 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 CO2 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.
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 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.
Measured Parameter:
PRI (Photochemical Reflectance Index) = (R531 – R570) / (R531 + R570) Reference: Sellers et al. (1985)
NDVI (Normalized Difference Vegetative Index) = (R740 – R660) / (R740 + R660) Reference: Rouse et al. (1974)
Measuring Light:
Internal dual wavelength light source R531 = 531 nm, R570 = 570 nm for PRI 210
Internal dual wavelength light source VIS = 635nm, NIR = 760nm for NDVI 310
Detector Wavelength Range:
PIN photodiode with 500 to 600 nm bandpass filters for PRI 210;
PIN photodiode with 620 to 750 nm bandpass filters for NDVI 310
FluorPen 1.1 Software: Windows 7 or higher
Sample Holder: Mechanical leaf clip
Bios: Upgradeable firmware
Memory Capacity: 16MBit
Communication for data transfer: USB and Bluetooth
Internal Data Logging: Up to 100,000 data points
Display: Graphical display
Keypad: Sealed, 2-key tactile response
Keypad Escape Time: Turns off after 5 minutes of no use
Power Save Mode: Autosleep
Power Supply: Li-ion rechargeable battery
Battery Capacity: 2000 mAh
Max. Charging Current: 0.5 A
Charging via USB port: PC, power bank, USB charger, etc.
Battery Life: 70 hours typical with full operation
Low Battery Detection: Low battery indication displayed
Size: 135x 65 x 33 mm
Weight: 188 g
Operating Conditions:
Temperature: 0 to +55ºC
Relative humidity: 0 to 95% (non-condensing)
Storage Conditions:
Temperature: -10 to +60ºC
Relative humidity: 0 to 95% (non-condensing)
| 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. |
200 € |
| Mini-Computer * | 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). |
12 € |
| 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 € |