The CCM-300 is a unique fluorometer designed to measure chlorophyll content in samples that have traditionally been difficult to analyze non-destructively. This compact, handheld instrument measures the ratio of chlorophyll fluorescence at 735 nm and 700-710 nm. This ratio is linearly proportional to chlorophyll concentrations up to 675 mg m-2, with a coefficient of determination greater than r2=0.95.

In laboratory and field tests, the CCM-300 chlorophyll content meter has proven to be highly accurate in measuring chlorophyll concentrations from 41 mg m-2 to 675 mg m-2.

This new method has many advantages over older, absorption methods. These advantages include:

Samples do not have to fill the measuring aperture, so small samples can be measured.
Samples do not have to allow the measuring beam to pass through, so thick samples can be measured.
Surfaces do not have to be smooth, so complex plant morphologies can be measured.
There is no Kautsky induction effect, so measurements can be quickly repeated at the same location.
Small sample area, so naturally occurring structures such as midribs and veins can be avoided.
Larger measurement range (675 mg m-2 compared to 300 mg m-2 for absorption techniques), allowing many more samples to be measured.

Thanks to all these features, ADC users can now measure conifer needles, lawn grass, Arabidopsis, immature rice and wheat, mosses, bryophytes and lichens, fruit skin, petioles, stems, cacti, agaves and algae on rocks for the first time.