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.