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| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Direct Manufacturer |
| Model | TYS-B |
| Chlorophyll Range | 0.0–99.9 SPAD |
| Leaf Surface Temperature Range | 0–50 °C (customizable) |
| Measurement Interval | <2 s |
| Measurement Area | 2 mm × 2 mm |
| Chlorophyll Accuracy | ±1.0 SPAD (at room temperature, SPAD 0–50) |
| Temperature Accuracy | ±0.5 °C |
| Repeatability | ±0.3 SPAD / ±0.2 °C |
| Display | 1.3″ OLED |
| Data Transfer | Bluetooth 5.0 |
| Power | Two 1.5 V AA batteries (≈5,000 measurements per set) |
| Onboard Storage | 2,000 records |
| App & Cloud Integration | Yes |
| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | SPAD-502PLUS |
| Measurement Principle | Dual-wavelength optical absorbance differential method (650 nm & 940 nm) |
| Measurement Area | 2 mm × 3 mm |
| Sensor | Silicon photodiode |
| Display | LCD with 4-decimal resolution and real-time trend graph |
| Range | –9.9 to 199.9 SPAD units |
| Memory Capacity | 30 measurements with auto-calculated mean |
| Power | Two AA batteries (1.5 V) |
| Battery Life | >20,000 measurements |
| Measurement Interval | 2 seconds |
| Accuracy | ±1.0 SPAD units (at 0–50 SPAD, 25 °C) |
| Repeatability | ±0.3 SPAD units (0–50 SPAD) |
| Reproducibility | ±0.5 SPAD units (0–50 SPAD) |
| Dimensions | 164 × 78 × 49 mm (L × W × H) |
| Weight | 225 g |
| Operating Temperature | 0–50 °C |
| Additional Functions | Audible alert, on-device calibration, GLP-compliant data logging |
| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | OEM/ODM Manufacturer |
| Country of Origin | China |
| Model | TYS-4N |
| Measurement Range | Chlorophyll (SPAD): 0.0–99.9 SPAD |
| Leaf Surface Temperature | 0–50 °C (customizable) |
| Leaf Relative Humidity | 0.0–99.9 %RH |
| Nitrogen Content | 0.0–99.9 mg/g |
| Measurement Interval | <2 s |
| Measurement Area | 2 mm × 2 mm |
| Accuracy | Chlorophyll: ±1.0 SPAD (at 25 °C, SPAD 0–50) |
| Leaf Temperature | ±0.5 °C |
| Leaf RH | ±5.0 %RH |
| Nitrogen | ±5% |
| Repeatability | Chlorophyll: ±0.3 SPAD |
| Leaf Temperature | ±0.2 °C |
| Leaf RH | ±0.5 %RH |
| Nitrogen | ±0.5 mg/g |
| Display | 1.3″ OLED |
| Data Transfer | Bluetooth 5.0 |
| Power | Two 1.5 V AA batteries (≥5,000 measurements per set) |
| Onboard Storage | 2,000 records |
| Battery Alert | Visual + audible alert at ≤20% charge |
| Brand | Top Cloud-agri |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | TYS-4N |
| Chlorophyll Range | 0.0–99.9 SPAD |
| Leaf Surface Temperature Range | −10–99.9 °C |
| Leaf Surface Humidity Range | 0.0–99.9 %RH |
| Nitrogen Content Range | 0.0–99.9 mg/g |
| Measurement Interval | <3 s |
| Measurement Area | 2 mm × 2 mm |
| Chlorophyll Accuracy | ±1 SPAD (at 25 °C, SPAD 0–50) |
| Leaf Temperature Accuracy | ±0.5 °C |
| Leaf Humidity Accuracy | ±5 %RH |
| Nitrogen Accuracy | ±5 % |
| Chlorophyll Repeatability | ±0.3 SPAD |
| Leaf Temperature Repeatability | ±0.2 °C |
| Leaf Humidity Repeatability | ±0.5 %RH |
| Nitrogen Repeatability | ±0.5 mg/g |
| Data Storage | 32 KB |
| Power Supply | 4.2 V rechargeable Li-ion battery (2000 mAh) |
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