Thanks to more than 15 years of research, FORCE-A designs, develops and markets optical diagnosis tools for plants.
The Dualex® is a portable optical sensor that measures the polyphenolic and chlorophyll contents of the leaf epidermis
in a real-time and non-destructive way.

TOOLS TO MEASURE EPIDERMAL POLYPHENOLS：
The Dualex® leaf clips are easy to use in order to
determine plant health status and to measure
specifically the polyphenolic constituents and
chlorophyll.
Dualex® Flav for Flavonols
Dualex® Anth for Anthocyanins
Dualex® HCA for HydroxyCinnamic Acids
(chlorogenic, chicoric acids, etc.)

The patented technology used in the Dualex® series is based on chlorophyll fluorescence and the screening effect due to polyphenols from the leaf epidermis. It is insensitive to variable chlorophyll fluorescence and independent of leaf chlorophyll content. Measurements are non-destructive, very fast and simple. They do not need any calibration and can be performed under ambient light outdoors. No preparation is required.

AGRIBUSINESS APPLICATIONS：
Dualex® Flav and Dualex® Anth assess quickly and
quantitatively flavonol and anthocyanin contents in fruits
and vegetables (leaves and skins) for the following
themes:
Polyphenolic antioxydants
Nutraceutics and medicinal food
Colourings
Dualex®

AGRICULTURAL APPLICATIONS：
Fertilisation monitoring
Harvest quality assessment (proteins, eco-product
development, etc.)
Light protection, low temperatures
Burn prevention
Colour (anthocyanins)
Variety selection
This technology allows to get:
Chlorophyll and polyphenolic measurements
Quick measurements (<1s)
Non-destructive measurements
Real-time and in situ diagnosis

This technology allows to get:
Chlorophyll and polyphenolic measurements
Quick measurements (<1s)
Non-destructive measurements
Real-time and in situ diagnosis

SPECIFICATIONS:

Measured item Plant leaves
Measured parameter Optical absorbance at 375 nm (for flavonols)
Optical transmittance for 3 wavelengths in the near-infrared
Measurement area 5 mm diameter
UV absorbance range From 0.00 to 3.00
1) Absorbance accuracy (1σ) 5%
2) Repeatability (1σ) 2.5%
3) Reproductibility (1σ) 3.5%
Chlorophyll rate From 0 to 150 (Dualex® unit, easily convertible to μg/cm²)
1) Repeatability (1σ) 1.3%
1) Reproductibility (1σ) 4.5%
Acquisition time < 500 ms
Light sources 5 LED: UV-A, Red and 3 NIR
Detector 1 Silicon Photodiode
Storage capacity About 10,000 multiparametric measurements
User interface LCD screen
Data interface USB connexion
Temperature range From 5°C to 40°C,
for a variation of absorbance below 2%
Battery Li-ion rechargeable batteries (proprietary)
Battery autonomy 7 hours
Charging time 4 hours
Total weight 400 g (with the battery)
Leaf clip size 200 mm x 70 mm x 40 mm

These technical specifications can be modified without any preliminary notice.

Producing Area:France