A leafclip optical sensor
For measuring chlorophyll and polyphenols content of plant leaves.
DUALEX
Instant non-destructive nitrate and clorophyl measurement.
Dualex is a leafclip sensor which measures chlorophyll and polyphenols content of plant leaves.
About DUALEX
Thanks to a patented technology, this optical sensor allows simple, fast and non-destructive measurement of chlorophyll, flavonols and anthocyanins in leaves.
ACCURATE MEASUREMENT OF CHLOROPHYLL
Chlorophyll plays a vital role in photosynthesis and plant development. Dualex measures the chlorophyll by analyzing the light transmitted through the leaf. Thanks to a chemical calibration made by FORCE-A, the chlorophyll is given in µg/cm² in the range of 5-80 µg/cm².
UNIQUE LEAFCLIP SENSOR TO MEASURE FLAVONOLS AND ANTHOCYANINS CONTENT IN LEAVES
Flavonols are mainly synthetized after light exposure. As a consequence, they are a good indicator of plant-light interaction history.
Dualex measures flavonols and anthocyanins by analyzing the screening effect of flavonols and anthocyanins on chlorophyll fluorescence. Flavonols and anthocyanins content are given in relative absorbance units from 0 to 3 for flavonols and 0 to 1.5 for anthocyanins.
NBI®: NITROGEN BALANCED INDEX
Chlorophyll is often used as an indicator of plant nitrogen status. Several years of research and experimentation showed that polyphenols, specifically flavonols, are also good indicators of nitrogen status of plants.
NBI® (Nitrogen Balance Index) combines chlorophyll and flavonols (related to nitrogen/Carbon allocation). It’s a nitrogen plant status indicator directly correlated with massic nitrogen content. The NBI® is less sensitive to the variations of environmental conditions than the chlorophyll (leaf age, leaf thickness…).
TECHNICAL SPECIFICATIONS
| Measuring material | Transmittance and screening effect on chlorophyll fluorescence |
| Index measured | Chlorophyll (CHL), Flavonols (FLAV), anthocyanins (ANTH), NBI |
| Accuracy | 5% |
| Reproducibility | 4,5% for CHL, 3,5% for FLAV and ANTH |
| Repeatability | 1,3% for CHL, 2% for FLAV and ANTH |
| Area measured | 19,6 mm² |
| Leaf thickness | 1.5 mm maximum |
| Measurement time | < 1 s |
| User interface | LCD screen, Sound warning |
| Positioning | Internal GPS |
| Relative accuracy | < 2,5 m (CEP, 50%, 24 h static) |
| Storage capacity | 10 000 multiparametric data |
| Data output | .csv file |
| Data transfer | USB |
| Operating temperature | From 5 to 45 °C |
| Battery | Li-ion rechargeable |
| Autonomy | 6 hours |
| Total weight | 220 g |
| Size | 205 x 65 x55 mm |