DUALEX SCIENTIFIC - Force-A

TECHNICAL SPECIFICATIONS - DUALEX ® SCIENTIFIC
Measured material
Measured parameters
Measurement process
Measured area
Sample thickness
Measurement area access
Acquisition time
Storage capacity
Data classification
Flavonoids
Absorbance accuracy (σ) 5%
Repeatability (σ) 2.5%
Reproducibility (σ) 3.5%
Plant leaves
Optical absorbance at a UV wavelength (flavonoid content)
Optical transmittance at 2 near-infrared wavelengths (chlorophyll content)
Main button pressure or clips closing (free choice)
5 mm in diameter
1 mm maximum
8.5 cm maximum (half-leaf width)
< 500 ms
> 10 000 multiparametric measurements
3 levels (file, group and measurement number)
From 0.00 to 3.00 (DUALEX ® units, convertible to μg/cm² after calibration)
Chlorophyll
From 0.00 to 150.00 (DUALEX ® units, corresponds to μg/cm² of chlorophyll a+b)
Repeatability (σ) 1.3%
Reproducibility (σ) 4.5%
NBI ®
From 0.00 to 999.00 (DUALEX ® units)
Temperature range From 5 to 40°C (variation of absorbance < 2%)
Light sources
4 LED: 1 UV-A, 1 Red and 2 Near Infra-Red (NIR)
Detector
1 Silicon Photodiode
User interface
LCD screen
Sound warning
Data downloading
USB connexion for data transfer
Data organisation compatible with any data processing software
Power source
Li-ion rechargeable battery
Autonomy
10 hours
Charging time
4 hours
Total weight
220 g (with battery)
Size
205 mm x 65 mm x 55 mm
Positioning
Internal GPS
Accuracy (pass to pass)
> 1 m
Languages
English, French
Safety
Ring for leash
Updating
Internet online updating
Warning: as FORCE-A is continuously improving its products, technical specifications can be changed without prior notice.
USB Interface
Ring for leach
Keyboard
LCD screen
Cartelat, A., Cerovic, Z.G., Goulas, Y., Meyer, S., Lelarge, C., Prioul, J.-L., Barbottin, A., Jeuffroy, M.-H., Gate, P., Agati, G., Moya, I., 2005. Optically assessed contents of leaf
polyphenolics and chlorophyll as indicators of nitrogen deficiency in wheat (Triticum aestivum L.). Field Crops Res. 91, 35-49.
Cerovic, Z.G., Ounis, A., Cartelat, A., Latouche, G., Goulas, Y., Meyer, S., Moya, I., 2002. The use of, chlorophyll fluorescence excitation spectra for the nondestructive in situ
assessment of UV–absorbing compounds in leaves. Plant Cell Environ. 25, 1663-1676.
Demotes-Mainard, S., Boumaza, R., Meyer, S., Cerovic, Z.G., 2008. Indicators of nitrogen status for ornamental woody plants based on optical measurements of leaf polyphenolics
and chlorophyll contents. Sci. Hort. 115, 377-385.
FORCE-A
Centre Universitaire Paris Sud, Bât. 503
91893 ORSAY Cedex - France
Tel : +33 (0)1 69 35 88 62
Fax : +33 (0)1 69 35 88 97
Opening lever
Optical emitting
head
Optical
detecting head
www.force-a.com
e-mail : info@force-a.fr
Notice Dualex ® 4 Scientific Anglaise - Edition 2 - Decmber 2010 - Document non contractuel