CCM-300  Chlorophyll Content Meter is designed to measure difficult samples. It can be used on conifers, turf grasses, moss, lichen, immature wheat, immature Arabidosis, stems, and petioles, as well as easier samples, like corn and broadleaf plants. The instrument was designed around research done by Gittelson, Bushman, & Lichtenthaler in 1999. The research shows that this method offers a larger reliable measuring range than absorption. style meters, provides a ratio that correlates with chemical tests & provides direct readout of chlorophyll content in mg/m2, that is reliable for many plant species. Adjustments to the direct chlorophyll content readout equation are possible for other species.

Measured Parameters:

CFR or Chlorophyll Fluorescence Ratio - fluorescence emission ratio of intensity at 735 nm / 700 nm, or readout or relative chlorophyll content in mg/m2.

Measurement Area:

3 mm diameter circle, external diameter of 4 mm. However, the instrument will reliably measure samples that are much smaller than 3 mm.

Resolution:

Ratio 0.01 or 1 mg/m2.

Repeatability:

Dependent on signal strength. For samples with low signal strength, averaging of multiple measurements is recommended. For samples with good signal strength, ratio values of +- 0.03 or better, are common.

Noise:

<+/- 2%.

Source:

460 nm blue LED with half bandwidth of 15 nm.

Detector:

Two solid state, high sensitivity detectors. Band limiting filter sets provided. Dual wavelength detection at the same time. 700 nn to 710 nm, and 730 nm to 740 nm.

Detection:

Modulated light digitally controlled to minimize background detection. Temperature compensation included for light source and detector.

Storage Capacity:

2 Gigabytes of non-volatile flash memory.

Modes:

Single point measurement.

Measurement averaging for 2-30 samples.

Averaging with 2 sigma outlier removal.

Median determination.

Sample interface:

Fiber-optic probe 4mm in diameter.

User Interface:

240 x 320 pixel color touch screen.

Output:

USB 1.1.

Temperature Range:

0-50 Degrees C.

Power Source:

2 rechargeable AA batteries.

Auto Off Interval:

Programmable from 0 to 20 minutes (after no key press or download).

Size:

12 cm x 9 cm x 3 cm.

Weight:

0.6 lbs (275 g).

Measuring time:

5 seconds.

Components included:

Fluorometer, fiberoptic, sample holder, battery charger, 4 AA NiMH rechargeable batteries, USB cable, transport case, and manual.