Productdescription: SPAD***2 PLUS chlorophyll Meter can measure relative content of chlorophyll, non-destructive to leaves. Measured datum will be displayed in trend graph. It can be used to enhance the utilization rate of nitrogen fertilizer.
Technical parameters: Measuring mode: 2 wavelengths optical density difference Measuring area: 2 mm×3 mm Sensor: Silicon semiconductor photodiode Display mode: LCD, 4 decimal places, tendency chart Measuring range: *9.9 to **9.9 SPAD units Memory capacity: *0datum, automatically calculate and display average value Power: 2 AA batteries (1.5V) Battery life: More than *0,**0 times Test interval: 2s Accuracy: Within ±1.0 SPAD units (for SPAD value between 0 and *0 under normal temperature) Repeatability: Within ±0.3 SPAD units (for SPAD value between 0 and *0) Reproducibility: Within ±0.5 SPAD units (for SPAD value between 0 and *0) Working environment: ***0°C Other functions: alarm; calibration
