Net Radiation Monitoring Station - IC-SNiP-NRAD-SL

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Product code: IC-SNiP-NRAD-SL
Net Radiation monitoring station. Includes: 1 x SN-500 Net Radiometer with AM-500 mount bracket, S-NODE with LoRaWAN communications, 6.5Ah rechargeable li-ion battery, 10W Solar Panel and SPLM7 mounting system for node and solar panel.

Description

Net radiation is a key variable in the surface energy balance and influences turbulent fluxes, including evapotranspiration. Applications include measurements on flux towers and weather stations.

The new Apogee Instruments SN-500 four-component net radiometer features SDI-12 output.

- Four-component Net Radiometer
- An upward-looking and downward-looking pyranometer, and an upward-looking and downward-looking pyrgeometer provide separate measurements of the four components of net radiation.
- Onboard A/D Conversion and SDI-12 Output
- Apogee net radiometers feature onboard A/D conversion and SDI-12 output to eliminate the requirement of multiple analogue datalogger channels.
- Individually Heated Radiometers
- Each radiometer includes an individual heater to increase accuracy by minimising the influence of dew, frost and snow on the filter.
- Compact and Light Weight
- Designed to be light weight and small in size to facilitate easy mounting.
- Cost-effective
- Apogee's net radiometer is low cost compared to other four-component net radiometers on the market.

The S-Node features:

- LoRaWAN low-power long-range connectivity
- Supporting SDI-12, 2 x 32-bit dry-contact counting digital inputs.
- Optional CAT-M1
- Solar rechargeable Lithium-ion, Single use LiSOCl2, or external 12V power options
- Optional Multi-constellation GNSS
- AS923 and AU915 available, with other region plans available upon request
- Optional Bluetooth interface
- Threshold based alarms
- Standard IP65 enclosure, optional IP67

Pyrgeometer Specifications:

- Sensitivity: 0.12 mV per W m-2 (variable from sensor to sensor, typical value listed)
- Calibration Factor (Reciprocal of Sensitivity): 8.t W m-2 per mV
- Calibration Uncertainty: +/- 5%
- Output Range: -24 to 24 mV
- Measurement Repeatability: Less than 1%
- Long-term Drift: Less than 2% change in sensitivity per year
- Non-linearity: Less than 1%
- Detector Response Time: 0.5 s
- Field of View: 150
- Spectral Range: 5 to 30 m (50% points)
- Temperature Response: Less than 0.1 C-1
- Window Heating Offset: Less than 10 W m-2
- Zero Offset B: Less than 5 W m-2
- Tilt Error: Less than 0.5%
- Uncertainty in Daily Total: +/- 5%
- Temperature Sensor: 30 kilohms thermistor, +/- 1 C tolerance at 25 C
- Output from Thermistor: 0 to 2500 mV (typical, other voltages can be used)
- Input Voltage Requirement for Thermistor: 2500 mV excitation (typical, other voltages can be used)

Pyranometer Specifications:

- Sensitivity: 0.057 mV per W m-2 (upward-looking); 0.15 mV per W m-2 (downward-looking); (variable from sensor to sensor, typical values listed)
- Calibration Factor (Reciprocal of Sensitivity): 17.5 W m-2 per mV (upward-looking); 6.7 W m-2 per mV (downward-looking)
- Calibration Uncertainty: +/- 5%
- Output Range: 0 to 114 mV (upward-looking; 0 to 300 mV (downward-looking)
- 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: 0.5 s
- Field of View: 180 degrees (upward-looking); 150 degrees (downward-looking)
- Spectral Range: 385 nm to 2105 nm (upward-looking); 295 nm to 2685 nm (downward-looking); (50% points)
- Directional (Cosine) Response: Less than 20 W m-2 at 80 degrees 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%

General specifications:

- Input Voltage Range: 5 to 16 V DC (heaters are optimised to run at 12 V DC)
- Current Draw (12 V DC Supply Voltage): Heaters on, communication enabled: 63 mA; Heaters off, communication enabled: 1.5 mA; Heaters off, communication disabled: 0.6 mA
- Response Time (using SDI-12 Protocol): 1 s (SDI-12 data transfer rate; detector response time are 0.5 s)
- Heaters (sensors individually heated): 62 mA current drain and 740 mW power requirement at 12 V DC
- Operating Environment: -50 to 80 C; 0 to 100% relative humidity
- Dimensions: 116 mm length, 45 mm width, 66 mm height
- Mass: 320 g (with mounting rod and 5 m of lead wire)
- Cable: M8 connector (IP67 rating) to interface to sensor housing; 5 m of four conductor, shielded, twisted-pair wire in a santoprene rubber jacket with pigtail lead wires

Manuals and Datasheets

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