The SNiP-SR5 is a preconfigured 'Sensor Node Integrated Package' for LoRaWAN communication of real-time measurements of solar radiation, for continuous environmental monitoring.
The SNiP-SR5 integrates 1x AD-NODE and 1x SP-510 Upward-Looking Thermopile Pyranometer Sensor to a site’s unique network, communication and power requirements.
The SP-510 thermopile pyranometer is designed for accurate and stable global shortwave radiation measurement and reflectance. The upward-looking model is cosine-corrected, with directional errors less than 20 W m2 at 80° solar zenith angle. Long-term non-stability, determined from multiple replicate pyranometers in accelerated aging tests and field conditions, is less than 2% per year. The SP-510 combines a blackbody thermopile detector and acrylic diffuser, and is a significant improvement when compared to the spectral response of silicon-cell pyranometers, but keeps the price close to that of silicon-cell pyranometers.
Further parameters can be added to the SNiP without requiring loggers to match each distinct sensor, substantially reducing the cost of getting a fuller picture on the application.
The AD-NODE is designed for those requiring precision in their analogue and digital measurements. With a 24-bit ADC, the AD-NODE supports two RTDs, a 0–10V with compressing range and a 4–20mA input. Each of the four dry-contact digital inputs is capable of simultaneously sampling at 1 kHz, with periodic reporting. Settings on the device can be altered remotely via LoRaWAN™ or locally via USB.
|Sensitivity (variable from sensor to sensor, typical values listed)||0.057 mV per W m-2|
|Calibration Factor (reciprocal of sensitivity)
(variable from sensor to sensor, typical values listed)
|17.5 W m-2 per mV|
|Output Range||0 to 114 mV|
|Measurement Range||0 to 2000 W m-2 (net shortwave irradiance)|
|Measurement Repeatability||Less than 1%|
|Long-Term Drift||Less than 2% per year|
|Non-Linearity||Less than 1%|
|Detector Response Time||0.5s|
|Field of View||180°|
|385nm to 2105nm|
|Directional (Cosine) Response||Less than 20 W m-2 at 80° solar zenith|
|Temperature Response||Less than 0.1% °C-1|
|Zero Offset A||Less than 5 W m-2; Less than 10 W m-2 (heated)|
|Zero Offset B||Less than 5 W m-2|
|Uncertainty in Daily Total||Less than 5%|
|Warranty||4 years against defects in materials and workmanship|