FieldScout CM 1000 Chlorophyll Meter

FieldScout CM 1000 Chlorophyll Meter Specifications Measurement Sample : Plant leaves, turf grass canopy Measurement System : Reflectance; Ambient and reflected 700 nm and  840 nm light are used to calculate the relative chlorophyll index Measurement Area : Conical viewing area between 12 and 72 in Minimum Distance : 12 in ( 30.5 cm) from lens Maximum Distance : Accuracy is unknown beyond 72 in from lens Distance From Lens : 12 in ( 30.5 cm) 18 in ( 45.7 cm) 48 in ( 1.22 m) Sample Area ( Diameter) : 0.53 in ( 1.35 cm) 1.21 in ( 3.07 cm) 4.65 in ( 11.8 cm) Receptor : ( 4) photodiodes; ( 2) for ambient light and ( 2) for reflected  light from the sample ( leaf) Measurement Units : Index of relative chlorophyll content; 0 to 999 Measurement Interval : 2 seconds per measurement Repeatability : ± 5% of reading Data Logger : Requires software and PC interface cable; Capacity: 1, 350 measurements with GPS/ DGPS; 3, 250 measurements  without GPS/ DGPS; nonvolatile memory Battery/ Life : 2 AAA batteries ( included) ; approx. 3, 000 measurements