Advancing Plant Health and Nutrition Monitoring

Dualex - header

Instant non-destructive nitrogen and chlorophyll measurement.

Dualex is a leafclip sensor which measures chlorophyll content and polyphenol indexes of plant leaves.

About Dualex

Thanks to a patented technology, this optical sensor allows simple, fast, and non-destructive measurement of chlorophyll, flavanols and anthocyanins in leaves.
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Accurate measurement of chlorophyll

Chlorophyll plays a vital role in photosynthesis and plant development. Dualex measures chlorophyll by analyzing the light transmitted through the leaf at specific wavelengths. The chlorophyll content is given as an absolute value in µg/cm².

Unique combination:
Measure once, get three important leaf parameters

With a single measurement, Dualex captures not only chlorophyll content but also provides indices for flavonols and anthocyanins.

Flavonols are mainly synthesized after light exposure. As a consequence, they are a good indicator of plant-light interaction history.

Both flavonols and anthocyanins belong to the polyphenol group, known for their various health benefits. These compounds have antioxidant properties that help reduce cell damage and inflammation. Flavonols are associated with improved cardiovascular health and have the potential to reduce the risk of neurodegenerative diseases like Alzheimer’s. Meanwhile, anthocyanins contribute to cardiovascular health, offer anti-inflammatory effects, and provide additional antioxidant benefits.

Dualex measures flavonols and anthocyanins by analyzing their screening on chlorophyll fluorescence. A smart measuring system uses different light wavelengths to excite the chlorophyll, measure its fluorescence and then calculate the results. Flavonols and anthocyanins are both given in relative absorbance.

Dualex measuring

NBI®: Nitrogen balanced index

Chlorophyll is often used as an indicator of plant nitrogen status. However, several years of research and experimentation showed that polyphenols, specifically flavonols, are also good indicators of nitrogen status of plants.

The NBI® (Nitrogen Balance Index) combines chlorophyll and flavonols into a single, more precise result. It’s a plant nitrogen status indicator directly correlated with massic nitrogen content. The NBI® is less sensitive to variations of environmental conditions than chlorophyll (leaf age, leaf thickness…).

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