Class A albedometer SRA300-D1

Overview
The SRA300 is an industrial-grade Class A albedometer designed for high-accuracy measurement of global solar radiation, reflected solar radiation, and solar albedo. Built using two SR300-D1 Class A pyranometers and a dedicated mounting assembly, this all-digital, heated sensor system delivers exceptional measurement reliability and accuracy for photovoltaic (PV) performance monitoring, bifacial PV applications, and meteorological observations. Integrated heating, ventilation, tilt sensing, and advanced diagnostics ensure reliable operation in all climates and demanding outdoor environments.

Key features
• Class A performance: fully compliant with ISO 9060:2018 Class A classification for high-accuracy solar radiation and albedo measurements.
• Measures global solar radiation, reflected solar radiation, and solar albedo (solar reflectance).
• Consists of two SR300-D1 Class A pyranometers, one facing upward and one facing downward.
• Integrated heating and ventilation: minimizes dew and frost effects for reliable operation in all climates.
• Built-in tilt sensor: continuously measures sensor tilt and rotation, supporting IEC-compliant PV monitoring and tracker applications.
• Advanced diagnostics: includes status LED and remote diagnostics such as leakage detection, heating status monitoring, tilt alerts, internal humidity monitoring, and internal pressure monitoring.
• 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 high-accuracy albedo measurements.
• Solar resource assessment and meteorological monitoring networks.

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 A albedometer
• Sensor configuration: 2 × Class A pyranometers (SR300-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