Products

Handheld Laser Leaf Area Meter (CI-203)

The CI-203 Handheld Laser Area Meter uses advanced laser technology to enable 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, handheld wand unit weighing 910g. Researchers can perform non-destructive measurements on leaves of living plants by simply pulling a leaf through the instrument, enabling collection of data from the same plant, or even the same leaf, throughout its life span. For rapid measurement of detached leaves, the CI-203CA, conveyor attachment makes a perfect complement to the CI-203.

In addition to the conveyor attachment, the CI-203 also has an optional attachment, CI-203RL for measuring the area of roots and other irregularly-shaped matter. All six measurement parameters (area, width, length, perimeter, shape factor, and aspect ratio) comprise a data set and are compiled at the same time, and over 15,000 data points can be stored and transferred to a computer or printer.

  • Our most flexible and powerful leaf area meter
  • Precise and accurate
  • Fast, non-destructive measurements
  • Durable and lightweight
  • Ideal for field use
  • Download data to computer
  • One-Touch Data: Simply sweep the CI-203 over a leaf to yield six measurement parameters: area, width, length, perimeter, shape factor, and aspect ratio.
  • Stores over 15,000 data points
  • Ideal for field use.
  • Non-destructive measurement
  • Measures area, length, width, and perimeter and calculates shape factor and aspect ratio
  • High resolution of 0.1mm²
  • No calibration required
  • Stores up to 15,000 single measurements
  • Easy to use
  • Light-weight and self-contained instrument with built-in data logger and Graphic display
  • Rechargeable battery
  • Measures objects up to 150mm (254mm with conveyor) wide and 25mm thick of virtually unlimited length
  • Conveyor Attachment (CI-203CA) is available for fast measurement in the field or lab.
  • Root Length Measurement Attachment (CI-203RL) is available.
  • RS232 port transfers data to printer or computer.

The CI-203 collects length, width, perimeter, and area measurements directly using a combination of a sweeping laser beam and an optical motion sensor. After activating the device by pressing the <start> key, a low energy laser beam sweeps across the laser window 500 times per second at a rate of 150 m/s. As the user moves the CI-203 wand down the leaf, an optical sensor records the motion, and the onboard processing unit collects the data. Each laser sweep uses the optical sensor data to correctly accumulate the area and perimeter measurements. When the optical sensor detects that vertical motion has stopped, the laser subsystem stops taking measurements and the processing unit computes and posts the final results.

The perimeter increment is calculated and added to the perimeter accumulator. The perimeter increment is calculated using the function:

Function

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:

Function

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:

Function
  • Measuring Thickness: 25mm maximum
  • Measuring Width: 150mm maximum
  • Measuring Length: 3m maximum
  • Resolution: 0.1mm²
  • Accuracy: ± 1% for samples >10cm²
  • Interface: USB serial interface
  • Measuring Units: cm² (area), cm (length, width, and perimeter)
  • Memory Size: 32k bytes, 15,000 readings
  • Display: 16 characters × 2 lines LCD
  • Scanning Speed: 200mm/second
  • Battery: 7.2 volt rechargeable NiMH
  • Battery Capacity: Over 15 hours of normal use
  • Operating Temperature: 0 - 50° C
  • Dimensions: 35.5L × 4.5W × 5Hcm
  • Weight: 910g

Specifications are subject to change without notice.

This is as easy as data collection gets. To measure leaf area, simply sweep the leaf through the measuring wand, and the CI-203 instantly scans and calculates the leaf area, width, length, perimeter, shape factor and aspect ratio.

The CI-203 is flexible as well as fast: use in the field to measure living leaves on plants one-by-one, or add the conveyor attachment and measure hundreds of individual leaves at a time. The CI-203 stores over 15,000 data points, and displays data on the LCD screen. Download measurements to a computer later at your leisure via the RS232 port.

  • Laser leaf area meter main unit
  • Internal battery
  • Battery charger
  • RS232 cable
  • Communication software
  • Operating manual
  • Hard-shell instrument carrying case
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