The CS320 is a digital thermopile pyranometer that measures broad-spectrum short-wave radiation and communicates over the simple SDI-12 protocol to the datalogger. This sensor design eliminates measurement error and programming errors that can adversely affect data quality.
This pyranometer has been designed to improve the global solar radiation measurement significantly (even under cloudy conditions) without adding substantial cost.The CS320 is suitable for applications ranging from environmental research to agriculture to large mesoscale weather networks (mesonets).
The CS320 is manufactured using a high-grade anodized aluminum body and IP68-rated 316 stainless-steel M8 connector (marine grade). The CS320 sensor is heated (on/off switchable under user control) and allows continuous operation in changing environmental conditions. The pyranometer's calibration data is stored on the sensor.
Benefits and Features
l Thermopile sensor eliminates spectral errors associated with silicon-cell pyranometers
l Much lower price point than other thermopile sensors
l On-board sensor automatically detects if the CS320 is level for installation, diagnostics, and remote troubleshooting
l Designed for long-term stability and deployment
l Dome-shape sensor head allows dew and rain runoff
l Internal heater to reduce errors from dew, frost, rain, and snow
l SDI-12 digital output
l Detachable waterproof connector from sensor head for fast, easy servicing
l Marine-grade (316) stainless-steel M8 connector for corrosion resistance in harsh environments
l Calibration data stored on sensor
Specifications
l Calibration Uncertainty：± 2.6%
l Measurement Range： 0 to 2000 W m-2 (net short-wave irradiance)
l Measurement Repeatability： < 1%
l Long-Term Drift：< 2% (per year)
l Non-Linearity： < 1%
l Detector Type ：Blackbody thermopile
l Detector Response Time： 2 s
l Field of View (FOV) ：180°
l Spectral Range ：385 to 2105 nm (50% points)
l Directional (Cosine) Response：< ±20 W m-2 (at 80° solar zenith)
l Temperature Response ：< 5% (from -15° to +45°C)
l Output： SDI-12 (version 1.4) 1200 bps
l Zero Offset A： 8 W m-2
l Zero Offset B ：< 5 W m-2
l Operating Environment： -50° to +50°C (0 to 100% relative humidity)
l Heater ：0.2 W (on-board)
l Heater Power Requirements：25 mA current drain (at 12 Vdc)
l Input Voltage Requirements：6 to 24 Vdc
l Current Drain：
5 mA (measurement)
3 mA (standby)
l Uncertainty in Daily Total ：< 5%
l Error Due to Clouds ：±2 %
l Factory Calibrations：
Traceable to secondary standard blackbody thermopile
pyranometers traceable to the world radiation reference in Davos,
Switzerland.
l Warranty ：4 years against defects in materials and workmanship
l Diameter： 34.3 mm (1.35 in.)
l Height ：39.6 mm (1.56 in.)
l Weight ：64.9 g (2.29 oz)
May vary due to potting.
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