Secondary Standard Pyranometer

Atech Sensor pyranometers are of the highest category in the ISO 9060 classification system : Secondary Standard. This solar radiation sensor is used where the highest measurement accuracy is required. It measures the solar radiation received by a plane surface, in W/m2, from a 180o field of view angle. Atech Sensor secondary standard pyranometer enables you to attain the highest measurement accuracy and excels in demanding applications. 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%, an improvement of 15% relative to competing models. The “zero offset a” specification of SR20 is 5 W/m2 unventilated whereas competing models state 12 W/m2 unventilated and 7 W/m2 ventilated.

Depending on the project requirement, we offer two variants in SR20 series:

SR20-T1 Secondary Standard Pyranometer with Analogue millivolt output
SR20-D2 Secondary Standard Pyranometer with both Modbus RTU over RS-485 and Analogue 4-20 mA Output.

●ISO Classification : Secondary standard pyranometer
●Calibration uncertainty : < 1.2% (k = 2)
●Response Time (95%) : 3s
●Zero offset a : 5 W/m2 unventilated, 2.5 W/m2 ventilated
●Spectral range : 285 to 3000 x 10-9 m
●Rated operating temperature : -40 oC to +80oC range
●Temperature response : <± 0.4% (-30°C to +50 °C)
●Combined power consumption of <1mA
●Calibration traceability to WRR
●Sealing : IP67
●Calibration registers accessible to users
●Temperature response test report included of individual instrument
●Directional response test report included