Class B albedometer SRA100-D1

spectrally flatfor weather stationsfor photovoltaic systems

Overview
The SRA100 is an industrial-grade Class B albedometer designed for measurement of global solar radiation, reflected solar radiation, and solar albedo. Built using two SR100-D1 Class B pyranometers and a dedicated mounting assembly, this all-digital, sensor system delivers measurements for photovoltaic (PV) performance monitoring, bifacial PV applications, and meteorological observations when lower accuracy is allowed.

Key features
• Class B performance: fully compliant with ISO 9060:2018 Class B classification for solar radiation and albedo measurements.
• Measures global solar radiation, reflected solar radiation, and solar albedo (solar reflectance).
• Consists of two SR100-D1 Class B pyranometers, one facing upward and one facing downward.
• Modular design facilitates maintenance, calibration, and sensor replacement.
• Industrial surge protection: integrated industrial-grade surge protection with optional SPD01 upgrade for enhanced immunity up to 4 kV.
• Lowest total cost of ownership: supported by a worldwide calibration and service network to minimize downtime and maintenance costs.
Applications
• Solar albedo monitoring for bifacial photovoltaic (PV) performance monitoring systems.
• Utility-scale solar power plants requiring albedo measurements.
• Solar resource assessment and meteorological monitoring networks.
• Measurement systems where lower accuracy is allowed

Specifications
• Measurand: Global solar radiation [W/m²]
• Measurand: Reflected solar radiation [W/m²]
• Optional measurand: Solar albedo (solar reflectance)
• Optional measurand: Net solar radiation [W/m²]
• Sensor classification: ISO 9060:2018 Class B albedometer
• Sensor configuration: 2 × Class B pyranometers (SR100-D1)
• Operating temperature range: -40 °C to +80 °C
• Communication protocol: Modbus RTU
• Hardware interface: 2-wire RS-485
• Electrical operating voltage: 8 to 30 VDC
• RS-485 isolation voltage: 1.5 kV
• Recommended calibration interval: < 2 years

Cable length options
• No cable
• 3 m
• 5 m
• 10 m
• 20 m