Class B albedometer SRA15

spectrally flatfor photovoltaic systemsfor weather stations

Overview
SRA15 series spectrally flat Class B albedometer is an instrument that measures global and reflected solar radiation and the solar albedo, or solar reflectance. It is composed of two SR15 series spectrally flat Class B pyranometers and one AMF03 albedometer mounting kit. AMF03 includes one glare screen, one mounting fixture with rod, mounting hardware and tools. Each pyranometer has a thermopile sensor, the upfacing one measuring global solar radiation, the downfacing one measuring reflected solar radiation.

System composition and variants

• Standard system: 2 × identical SR15-series spectrally flat Class B pyranometers (one upward-facing for global radiation, one downward-facing for reflected radiation) plus 1 × AMF03 albedometer mounting kit (glare screen, fixture with rod, mounting hardware and tools).
• Pyranometer options: digital SR15-D1 (with heating), analog SR15-A1 (mV output, with heating), or SR15-D2A2 (4–20 mA output).
• Standard cable length: 5 m (other lengths available on request).

Outputs & communications

• Available outputs (sensor-dependent): analog mV, Modbus TTL, Modbus RS-485, 4–20 mA (where specified).
• Modular sensor selection enables integration with data loggers and SCADA systems.

Standards & applications

• Designed to comply with ISO 9060:2018 and WMO recommendations for pyranometers.
• Typical applications: solar resource assessment, meteorology, environmental monitoring, photovoltaic site characterization and research.

Technical specifications

• Measurand: global solar radiation and reflected solar radiation.
• Optional measurand: albedo (solar reflectance) and net solar radiation.
• ISO 9060:2018 classification: spectrally flat Class B.
• Internal ventilation: not included.
• Heating: included (models as specified).
• Mounting: mounting rod with 15 × 10⁻³ m diameter (15 mm).
• Rated operating temperature: -40 to +80 °C.
• Included sensors (SR15): 2 × identical ISO 9060 spectrally flat Class B pyranometers — SR15-D1, SR15-A1 or SR15-D2A2 depending on configuration.
• Output (system / sensor dependent): analog mV, Modbus TTL, Modbus RS-485, 4–20 mA.
• Calibration uncertainty: < 1.8 % (k = 2).
• Calibration traceability: to WRR (World Radiometric Reference).
• Measurement range: 0 to 2000 W/m².
• Temperature response: < ±2 % (-10 to +40 °C).

Included parts (AMF03)

• 1 × glare screen
• 1 × AMF03 fixture with rod
• 1 × conical positioner
• 2 × M5x12 socket head cap screw
• 1 × M6x8 socket head cap screw
• 2 × M8x12 set screw
• 1 × mounting and fixation instruction sheet