Description
Chlorophyll Meter SPAD-502Plus Made in Japan
Quick, easy measurement of chlorophyll levels in plant leaves without damaging the leaf.
Measurements are taken by just closing the measuring head on the leaf. Since the leaf is not cut off or damaged in any other way, the same leaf can be measured as the plant grows.
Trend graph display
Up to 30 measurements can be stored in memory and displayed on a trend graph, so that changes in measurements over time can be seen and abnormal values can be noticed at a glance.
Water-resistant
The SPAD-502Plus is water-resistant (IPX-4) so it can be used outdoors even in the rain.
Specification:
| 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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