RP-400 Poly-PlantPen
RP-400 Poly-PlantPen features a complete system for measurement of spectral reflectance of an internal light source (Xenon incandescent lamp 380 - 1050 nm) from leaves, as well as measurements of transmittance and absorbance of any external light source. In addition, PolyPen incorporates formulas of commonly used reflectance indices (e.g. NDVI, NDGI, PRI, Greenness Index, etc.) into its software. Measured data are instantly displayed in graphs or data sheets on the device screen display. They are also stored in the device memory for later re-collection or transfer onto a PC.
RP-400 Poly-PlantPen is a self-contained system that runs on Li-Ion rechargeable battery and does not require any external PC. It features an innovative user interface with integral computer, full color touch screen display, built-in light source, and a sample holder - leaf clip. The device is delivered with a Spectralon standard for the highest diffuse reflectance values (included in the price).
RP-400 Poly-PlantPen Features
- Complete system for measurement of spectral reflectance on leaves
- Automatic calculation of all commonly used reflectance indices
- Custom indices calculation possible
- Programmable via intuitive touch-screen use
- Integrated light source
- Leaf clip for non-destructive, in-situ measurements
- USB connectivity
- No PC needed
- Handheld, lightweight and battery-powered with affordable price
Applications:
- Photosynthesis research
- Photosynthesis education
- Plant screening and field studies
- Agriculture
- Large plant-screening programs
- Biotechnology
Specifications |
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| Light Source: | Xenon incandescent lamp 380-1050 nm |
| Spectral Response Range: | 380 nm – 790 nm |
| Spectral Response Half Width: | 8 nm |
| Spectral Straylight: | -30 dB |
| Size of Aperture: | 7 mm |
| Scanning Speed: | About 100 ms |
| Touch Screen: | 240 x 320 pixel; 65535 colours |
| Memory Capacity: | 4 MB (up to 8000 measurements) |
| System Data: | 16 bit AD conversion |
| Dynamic Range: | High gain: 1:4300; Low gain: 1:13000 |
| Communication: | USB |
| Dimension: | 15 x 7.5 x 4 cm |
| Weight: | 300g |
| Case: | Splash-proof |
| Battery: | Li-Ion; rechargeable via USB port of a PC |
| Battery Life: | 48 hours (continuous operation) |
| Operating Temperature: | 0 to +50°C |
| Storage Temperature: | -20 to +70°C |
| Warranty: | 1 year parts and labour |
List of Calculated Vegetation Indices |
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| Light Source: Normalised Difference Vegetation Index (NDVI) |
Equation: NDVI = (RNIR – RRED ) / (RNIR + RRED)Reference: Rouse et al. (1974) |
| Simple Ratio Index (SR) | Equation: SR = RNIR / RREDReference: Jordan (1969);Rouse et al. (1974) |
| Modified Chlorophyll Absorption in Reflectance Index (MCARI1) | Equation: MCARI1 = 1.2 * [2.5 * (R790 – R670 ) – 1.3 * (R790 – R550)]Reference: Haboudane et al. (2004) |
| Optimised Soil-Adjusted Vegetation Index (OSAVI) | Equation: OSAVI = (1 + 0.16) * (R790 – R670 ) / (R790 – R670 + 0.16)Reference: Rondeaux et al. (1996) |
| Greenness Index (G) | Equation: G = R554 / R677 |
| Modified Chlorophyll Absorption in Reflectance Index (MCARI) | Equation: MCARI = [(R700 – R670 ) – 0.2 * (R700 – R550 )] * (R700 / R670)Reference: Daughtry et al. (2000) |
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Transformed CAR Index (TCARI)
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Equation: TSARI = 3 * [(R700 – R670 ) – 0.2 * (R700 – R550 ) * (R700 / R670)]
Reference: Haboudane et al. (2002)
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Triangular Vegetation Index (TVI)
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Equation: TVI = 0.5 * [120 * (R750 – R550 ) – 200 * (R670 – R550)]
Reference: Broge and Leblanc (2000)
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Zarco-Tejada & Miller Index (ZMI)
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Equation: ZMI = R750 / R710
Reference: Zarco-Tejada et al. (2001)
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Simple Ratio Pigment Index (SRPI)
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Equation: SRPI = R430 / R680
Reference: Pe uelas et al. (1995)
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Normalised Phaeophytinization Index (NPQI)
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Equation: NPQI = (R415 – R435 ) / (R415 + R435)
Reference: Barnes et al. (1992)
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Photochemical Reflectance Index (PRI)
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Equation: PRI = (R531 – R570 ) / (R531 + R570)
Reference: Gamon et al. (1992)
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Normalised Pigment Chlorophyll Index (NPCI)
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Equation: NPCI = (R680 – R430 ) / (R680 + R430)
Reference: Pe uelas et al. (1994)
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Carter Indices
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Equation: Ctr1 = R695 / R420 ; Ctr2 = R695 / R760
Reference: Carter (1994), Carter et al. (1996)
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Lichtenthaler Indices
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Equation: Lic1 = (R790 – R680 ) / (R790 + R680); Lic2 = R440 / R690
Reference: Lichtenthaler et al. (1996)
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Structure Intensive Pigment Index (SIPI)
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Equation: SIPI = (R790 – R450 ) / (R790 + R650)
Reference: Peñuelas et al. (1995)
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Gitelson and Merzlyak Indices
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Equation: GM1 = R750 / R550 ; GM2 = R750 / R700)
Reference: Gitelson & Merzlyak (1997)
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