Overview
Enviro Test Construct high precision portable handheld calibrator 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 Specifications
| Measuring mode | 2 wavelengths optical density difference |
| Sensor | Silicon semiconductor photodiode |
| Display mode | LCD, 4 decimal places, tendency char |
| Measuring range | -9.9 SPAD to 199.9 SPAD units |
| Memory capacity | 30datum, automatically calculate and display average value |
| Power | 2 AA batteries (1.5 V) |
| Battery life | More than 20,000 times |
| Test interval | 2 s |
| Accuracy | Within ±1.0 SPAD units (for SPAD value between 0 and 50 under normal temperature) |
| Repeatability | Within ±0.3 SPAD units (for SPAD value between 0 and 50) |
| Reproducibility | Within ±0.5 SPAD units (for SPAD value between 0 and 50) |
| Working environment | 32 °F to 122 °F (0 °C to 50 °C) |
| Measuring area | 0.07 in × 0.11 in (2 mm × 3 mm) |
| Size | 9.06 in ×7.48 in × 4.33 in (230 mm × 190 mm × 110 mm) |
| Weight | 1.76 lb (800 g) |
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