Geonica - Model GEO-SR12 -First Class Solar Radiation Sensor

The GEO-SR12 is supplied standard with a laboratory characterised directional response report, built-in case temperature sensor, and low power resistive heater for dew/frost prevention. Ideally suited for solar renewable systems performance and solar energy resource validation, the SR12 is the first COTS (Commercial Off-The-Shelf) pyranometer of its kind meeting the ISO-9060 First Class performance mandate for solar energy test applications.

ISO 9060 covers "Solar energy - Specification and classification of instruments for measuring hemispherical solar and direct solar radiation". The official classification name for SR12 is "first class pyranometer for purposes of solar energy test applications" as defined by ISO 9060 paragraph 4.3.2. ISO recommends and approves this pyranometer type for outdoor testing related to solar energy use. The added temperature sensor is used for additional quality assurance. Also added is 1.5 W heating. Heating in the evening will help to keep dew and frost away and will promote evaporation of deposited rain and snow.

• ISO classification: first class for solar energy test applications
• Zero offset : < ±5 W/m2 unventilated
• Spectral range: 285 to 3000 nm
• Sensitivity (nominal): 15pV/(W/m2)
• Operating temperature: -40 to +80 oC
• Irradiance range : 0 to 2000 W/m2
• Temperature response:±2%(-10°to+50°C)
• Calibration traceability: WRR
• Required heater power: 1.5W@12VDC
• Temperature sensor: Pt100 (standard), 10k0hm Thermistor (optional)
• Calibration uncertainty : <1.8%(k=2)
• Cable length: 5 m (standard) extended in multiples of 5 m (optional)