Thermal Sensors Analogue Class A pyranometer SR20 is a solar radiation sensor of the highest category in the ISO 9060 classification system: spectrally flat Class A. SR20 pyranometer should be used where the highest measurement accuracy is required. It is often used with data loggers that can directly accept its analog voltage output. Figure 1 SR20 spectrally flat Class A pyranometer. Introduction SR20 measures the solar radiation received by a plane surface, in W/m2, from a 180 ° field of view angle. SR20 enables you to attain the highest measurement accuracy at the best value for money and excels in demanding applications. After a thorough programme of acceptance testing, SR20 spectrally flat Class A was released in February 2013; it is now a household name. Improved measurement accuracy In order to improve overall measurement accuracy, Hukseflux effectively targeted two major sources of measurement uncertainty: calibration and “zero offset a”. The initial calibration uncertainty is reduced to less than 1.2 %. The “zero offset a” specification of SR20 is < 5 W/m2 unventilated. Ventilated (with VU01) it is just 2.5 W/m2. Figure 2 Dual setup in PV system performance monitoring. Copyright by Hukseflux. Version 2417. We reserve the right to change specifications without prior notice Page 1/4. For Hukseflux Thermal Sensors go to www.hukseflux.com or e-mail us: info@huksefl

Thermal Sensors Lowest total cost of ownership Customers prefer Hukseflux pyranometers for their unsurpassed measurement accuracy and their lowest total cost of ownership. Total costs are mainly determined by costs of installation, on-site inspections, servicing and calibration: The SR20 pyranometer uses a state-of-the-art thermopile sensor with black coated surface, two domes and an anodised aluminium body. The connector, desiccant holder and sun screen fixation are ultra-robust and designed for industrial use. All parts are specified for use across SR20’s entire rated operating temperature...

WMO performance level IEC 61724-1 compliance Calibration uncertainty Zero offset a Zero offset a Calibration traceability Spectral range Sensitivity (nominal) Rated operating temperature range Temperature response Temperature response test of individual instrument Directional response test of individual instrument Temperature sensor Standard cable length HuksefluxThermal Sensors Choosing the right instrument Pyranometers are subject to classification in three classes according to ISO 9060. From Class C to Class B and from Class B to Class A, the achievable accuracy improves by a factor 2. Measurement...

Thermal Sensors SR20 analogue Class A pyranometer This overview summarises the main features and benefits of SR20. Customers prefer Hukseflux pyranometers for their unsurpassed measurement accuracy and their lowest total cost of ownership. Best measurement accuracy • • • • • spectrally flat low zero offsets low calibration uncertainty best temperature dependence heated: compliant with IEC 61724-1 Class A for all locations and climatic conditions Best connector • interchangeable cables • IP67 grade • for industrial use Best sun screen • sealed • corrosion protection of body • no dry-cooking of...