Introduction to Sensor
The S2-412-SS NDVI Downward-Looking Sensor is a rugged two-channel digital sensor designed to measure Red (650 nm) and Near-Infrared (810 nm) wavelengths using the SDI-12 communication protocol. Its durable aluminum housing and IP68 marine-grade connector ensure reliable performance in demanding outdoor environments. It is ideal for plant canopy monitoring, crop health assessment, vegetation analysis, and tracking seasonal growth and senescence.
Specifications
Specifications
| Parameter | Specification |
|---|---|
| Calibration Factor (Reciprocal of Sensitivity) | Custom for each sensor and stored in firmware |
| Calibration Uncertainty | ±5% |
| Output Range | SDI-12 |
| Power Supply | 5.5 to 24 V DC |
| Wavelength Ranges | Red detector = 650 nm with 10 nm full-width half-maximum ± 3 nm; NIR detector = 810 nm with 10 nm full-width half-maximum ± 3 nm |
| Measurement Range | 2× full sunlight |
| Measurement Repeatability | Less than 1% |
| Long-Term Drift | Less than 2% per year |
| Response Time | Less than 0.6 s |
| Field of View | 35° |
| Directional (Cosine) Response | ±2% at 45°; ±5% at 75° zenith angle |
| Temperature Response | Less than 0.1% per °C |
| Housing | Anodized aluminum body with acrylic diffuser |
| IP Rating | IP68 |
| Operating Environment | −40 to 70 °C; 0 to 100% relative humidity |
| Dimensions | 23.5 mm diameter × 43 mm height |
| Mass | 110 g (with 5 m cable) |
| Warranty | 4 years against defects in materials and workmanship |
| Manufactured | Assembled in the USA |
Features
Applications