Class A pyranometer SR300-D1

RS-485digitalISO 9060

Overview
The SR300 is an industrial-grade Class A pyranometer for high-accuracy measurement of global solar irradiance, designed for photovoltaic (PV) performance monitoring, solar resource assessment, and meteorological applications. This all-digital, heated sensor combines industry-leading measurement accuracy with advanced diagnostics, integrated tilt sensing, and industrial-grade protection for reliable operation in demanding outdoor industrial environments.

Key features
• Class A performance: fully compliant with ISO 9060:2018 Class A classification and IEC 61724-1 requirements for Class A PV monitoring systems.
• All-digital design: provides accurate irradiance measurements and Modbus RTU communication via an isolated RS-485 interface.
• 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.
• Industrial surge protection: integrated industrial-grade surge protection with optional SPD01 upgrade for enhanced immunity up to 4 kV.
• Electromagnetic compatibility (EMC): meets IEC 61326-1 Industrial Equipment requirements. Rated for Industrial Electromagnetic Environments
• Lowest total cost of ownership: supported by a worldwide calibration and service network to minimize downtime and maintenance costs.

Applications
• Global solar irradiance monitoring for photovoltaic (PV) performance monitoring systems.
• Solar resource assessment and meteorological monitoring networks.
• Utility-scale solar power plants and tracker systems requiring IEC 61724-1 Class A compliance.
• Long-term solar monitoring in environments where dew, frost, and snow mitigation are critical.

Specifications
• Measurand: Global solar irradiance [W/m²]
• Additional measurand: Tilt angle (x, y, z components)
• Sensor classification: ISO 9060:2018 spectrally flat Class A pyranometer
• Measurement range: -400 to 4000 W/m²
• Temperature response (-30 °C to +50 °C): < ±0.4%
• Tilt measurement uncertainty: ±1° (0 to 180°)
• Operating temperature range: -40 °C to +80 °C
• Power consumption: normal mode (heated, ventilated) < 3 W, medium mode (unheated, ventilated) < 1 W, low-power mode (unheated, unventilated) < 0.5 W
• Electrical operating voltage: 8 to 30 VDC
• Communication protocol: MODBUS RTU over RS-485
• RS-485 isolation voltage: 1.5 kV
• Earthing terminal: Included
• Recommended calibration interval: < 2 years

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