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Enabling better global research outcomes in soil, plant & environmental monitoring.

SNiP-NDVI for Chlorophyll Status

The SNiP-NDVI is a 'Sensor Node Integrated Package' for LoRaWAN or CAT-M1 communication of real-time plant light reflection measurements, providing an accurate indication of the presence of chlorophyll, which correlates to plant health, stress and resilience to disease. This SNiP for continuous plant, light and environmental monitoring.

The SNiP-NDVI

The base SNiP-NDVI integrates 1x S-NODE and 2x Apogee SDI-12 NDVI sensors to a site’s unique network, communication and power requirements: 1x S2-411-NDVI-Sensor (Faces Up), and 1x S2-412-NDVI-Sensor (Faces Down). The S-NODE can support an additional 2 compatible sensors.

 

See Further Specifications on the S-NODE
See Further Specifications on the Apogee NDVI Sensors

Further parameters can be added to SNiP-NDVI, without requiring loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application.

S-NODE

The S-NODE (for Environmental Monitoring) has been designed to support the broad suite of SDI-12 based environmental sensors. The S-NODE can support sensors with higher power requirements; a solar panel can charge either the internal lithium-ion battery or both the node and sensor can be powered by an external 12V system (e.g. battery or mains source).

A decoder suitable for TTN will be provided based upon sensor configuration.

  • LoRaWAN™ low-power long-range connectivity
  • Supports the full range of SDI-12 commands, and sensors requiring constant excitation.
  • Optional CAT-M1
  • Solar rechargeable Lithium-ion or external 12V power options
  • Optional Multi-constellation GNSS
  • AS923, AU915 and US915 available, with other region plans available upon request.
  • Standard IP65 enclosure, optional IP67

 

Apogee S2-411-SS NDVI Sensor (Faces Up)

Sensitivity: 0.2 mV per µmol m-2 s-1
Calibration Factor: Custom for each sensor and stored in firmware (reciprocal of sensitivity)
Calibration Uncertainty: ± 5%
Measurement Repeatability: <1%
Non-stability (Long-term Drift): < 2% per year
Non-linearity: < 1% (up to 2500 µmol m-2 s-1 )
Response Time: < 1 m
Field of View: 180°
Wavelength Range: Red detector = 650 nm with 10 nm full-width half-maximum; NIR detector = 810 nm with 10 nm full-width half-maximum
Measurement Range 2x full sunlight
Directional (Cosine) Response: ± 2% at 45˚; ± 5% at 75˚ zenith angle
Temperature Response: Less than 0.1% per °C
Operating Environment: -40 to 70°C; 0 to 100 % relative humidity
Dimensions: 30.5 mm diameter, 36.6 mm height
Mass: 51 g
Power Supply: 5.5 to 24 V DC
Warranty:
4 years against defects in materials and workmanship

Apogee S2-412-SS NDVI Sensor (Faces Down)

Sensitivity: 0.2 mV per µmol m-2 s-1
Calibration Factor: Custom for each sensor and stored in firmware (reciprocal of sensitivity)
Calibration Uncertainty: ± 5%
Measurement Repeatability: <1%
Non-stability (Long-term Drift): < 2% per year
Response Time: < 1 m
Field of View: 40°
Wavelength Range: Red detector = 650 nm with 10 nm full-width half-maximum; NIR detector = 810 nm with 10 nm full-width half-maximum
Measurement Range 2x full sunlight
Directional (Cosine) Response: ± 2% at 45˚; ± 5% at 75˚ zenith angle
Temperature Response: Less than 0.1% per °C
Operating Environment: -40 to 70°C; 0 to 100 % relative humidity
Dimensions: 23.5 mm diameter, 40 mm height
Mass: 110 g (with 5 m of cable)
Power Supply: 5.5 to 24 V DC
Warranty:
4 years against defects in materials and workmanship