• Appareil portatif de mesure de la surface foliaire

Appareil portatif de mesure de la surface foliaire

The CI-202 Portable Laser Leaf Area Meter uses advanced laser technology to allow researchers a precise and convenient way to measure leaf area (or the areas of leaf-like objects). The high-resolution laser scanner, data logger, and display are all enclosed in a single, hand-held palette unit weighing approximately 2 Kg. Researchers can perform non-destructive measurements on leaves of living plants by simply sliding the scanner over the leaf, enabling collection of data from the same plant, or even the same leaf, throughout its life span. Precise leaf area measurement of even tender leaves is possible by employing a transparent sheath for protection.

  • Our most popular leaf area meter
  • Precise and accurate
  • Fast, non-destructive measurements
  • Durable and lightweight
  • Ideal for field use
  • Stores over 8000 data points
  • Download data to computer
  • Non-destructive measurement
  • Measures area, length, width, and perimeter and calculates shape factor and aspect ratio
  • High resolution of 0.1mm
  • No calibration required
  • Stores up to 8,000 single measurements
  • Easy to use
  • Lightweight and self-contained instrument with built-in data logger and LCD display
  • Rechargeable battery
  • Measures objects up to
  • USB port transfers data to computer


Theory of operation
The CI-202 directly measures length, width, area, and perimeter thru calculating ratio and shap factor after the measurement is completed.

Each time the control unit detects that the scanner has progressed 1 mm, the computer will check to see if the width reading is non-zero.

If the width measurement is non-zero, the computer takes the following actions:
  • The length measurement is increased by 1 mm.
  • The width measurement is added to the area accumulator.
  • If the width measurement is greater than the currently stored maximum width, the maximum width is updated.
Computing Ratio and Shape Factor

Aspect ratio and shape factor information can be easily calculated from the other information gathered. These derived quantities are calculated whenever necessary for the purposes of display or data dumping. The calculations used are shown below.

Aspect ratio is the ratio of the leaf length to its maximum width. It can be calculated from the equation:

Shape factor is the ratio of the leaf area to the leaf perimeter, corrected so that the shape factor of a circle is equal to 1. It can be calculated from the equation:


How to use it
  • To measure a leaf, simply lift the transparent film, place the leaf on the board, and slide the scanner over the board. The CI-202 yields instant results for leaf area, length, width, perimeter, ratio, and shape factor measurements.
  • Non-destructive measurement may be performed while the leaf is still attached to the plant.
  • Over 8,000 data readings can be stored or transferred to a computer.


Weight 1.8Kg
Measuring Thickness 15mm max
Measuring Width 150mm max
Measuring Length 36cm
Scanner 675nm Laser Diode
Resolution 0.025mm²
Accuracy ±1% for samples >10cm²
Interface USB 2.0
Memory Size 8,000 measurements
Display 16 characters × 2 lines LCD
Scanning Speed 127mm/second
Battery 7.2 volt rechargeable NiMH
Battery Capacity 15 hours
Operating Temperature 0 -50°C


What's in the box
The CI-202 includes:
  • Palette style scan board
  • Laser scanner with built-in control unit
  • Internal batteries
  • Battery charger
  • Communication software
  • One additional transparent film
  • Operating manual
  • Hard-shell instrument carrying case