Chlorophyll-Meter-SPAD-502-Plus
Chlorophyll Meter
SPAD-502Plus
The SPAD-502Plus enables quick, easy measurement of the chlorophyll content of plant leaves without damaging the leaf. Chlorophyll content is one indicator of plant health, and can be used to optimize the timing and quantity of applying additional fertilizer to provide larger crop yields of higher quality with lower environmental load.
Measurement method : Optical density difference at two wavelengths
Measurement area : 2 mm×3 mm
Subject thickness : 1.2 mm maximum
Subject insertion depth : 12 mm (with stopper having position adjustable from 0 to 6 mm)
Light source : 2 LED elements
Receptor : 1 SPD (silicon photodiode)
Display : LCD panel showing 4-digit measurement value (values shown to first decimal place) and 2-digit number of measurements; Trend graph of values in memory can also be shown.
Display range : -9.9 to 199.9 SPAD units
Memory function : Memory capacity for up to 30 values; Calculation/display of average of data in memory also possible
Power source : 2 AA-size alkaline batteries
Battery life : More than 20,000 measurements (when using new alkaline batteries under Konica Minolta test conditions)
Minimum interval between measurements : Approx. 2 seconds
Accuracy : Within ±1.0 SPAD units (for SPAD value between 0.0 and 50.0 under normal temperature/humidity)
“*” added to display when measurement exceeds 50.0 SPAD units
Repeatability : Within ±0.3 SPAD units
(SPAD value between 0.0 and 50.0 with no change in sample position)
Dimensions : 78 (W) ×164 (H) ×49 (D) mm
Weight : 200 g (excluding batteries)
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