TCM500 NDVI
New
Reflectance of red light (660 nm) and NIR (850 nm) to measure the turf canopy and the Normalized Difference Vegetation Index (NDVI).
Ref.: 2975NDVI
Availability date:
The Sensor measures: | Grass Color |
Turfgrass quality is visually evaluated by human assessors based on a scale of 1 (dead grass) to 9 (perfect grass) in the current assessment method. This evaluation practice has several disadvantages and therefore, there is the need for a better evaluation technique. Individual biases are inevitable and lead to some level of inconsistency, even among the most highly trained observers. Research from Clemson University, “Predicting Visual Quality Ratings of Turfgrass Research Plots Using Spectral Reflectance”(Muharrem, Keskin, Roy B. Dodd, Young J. Han, Ahmad Khalilian - Paper # 031114, ASAE 2003 Annual Meeting) is the basis for the technology used in this meter.
Get greater use out of your NDVI meter with powerful SpecMaps online application to discover the value of spatially variable sensor measurements. Mapping program requires GPS; not included.
Helps diagnose plant health based on color
- Measures reflected light from approximately a 3 inch (7.6 cm) diameter section of turfgrass
* GPS interface requires two cables. The GPS/DGPS cable (item 2950CV5) is available from Spectrum.
A PC serial interface cable supplied by the manufacturer of the GPS receiver is also required.
** PC cable connects to a computer USB port.
Measurement Sample: Turf grass canopy
Measurement System: Reflectance of red (660 nm) and NIR (850 nm) light
Measurement Area: Approx. 3.0 in (7.6 cm)
Measurement Units: Percent reflectance (0.0 to 99.9) of Red and NIR
NDVI (0.000 to 1.000)
Grass Index (1.00 to 9.00)
Power Source: 1 9 V alkaline battery (included); approx. 3,000 measurements
Repeatability: ± 5% of measurement
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