Hukseflux SR30



The all-digital SR30 pyranometer offers the highest accuracy and highest data availability: featuring new Recirculating Ventilation and Heating (RVH™) technology. The SR30 is fully compatible with the Orbit 360 Premium.

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The pyranometer is compliant in its standard configuration with Class A requirements of the new IEC 61724-1 standard. SR30 is “Secondary Standard” in the ISO 9060:1990 standard and “Spectrally Flat Class A” in the ISO 9060:2018 revision. It is the ideal instrument for use in PV system performance monitoring and meteorological networks.

Heated for high data availability, featuring new RVH™ technology

High data availability is attained by heating of the outer dome using ventilation between the inner and outer dome. RVH™- Recirculating Ventilation and Heating – technology, developed by Hukseflux, suppresses dew and frost deposition and is as effective as traditional ventilation systems, without the maintenance hassle and large footprint.
The dome of SR30 pyranometer is heated by ventilating the area between the inner and outer dome. RVH™ is much more efficient than traditional ventilation, where most of the heat is carried away with the ventilation air. Recirculating ventilation is as effective in suppressing dew and frost deposition at 2 W as traditional ventilation is at 10 W. RVH™ technology also leads to a reduction of zero offsets.

Compliant with IEC 61724-1:2017 Class A and B
IEC 61724-1: Photovoltaic System Performance Monitoring – Guidelines for Measurement, Data Exchange and Analysis – requires ventilation and heating for Class A monitoring. The SR30 complies with both, without the need for additional accessories.

Measurand:Hemispherical solar radiation
  • National Meteorological Networks
  • PV monitoring commercial and utility scale
  • PV monitoring small sized
  • Meteorology / climatology
  • Other
Heater:with RVH Recirculating Ventilation and Heating
ISO 9060:2018 classification:Class A (secondary standard)
IEC 61724-1:2017 compliance:Class A
Output:Modbus RS-485
Calibration uncertainty:< 1.2 % (k = 2)
Zero offset a:< 2 W/m²
Calibration traceability:to WRR
Calibration registers:accessible to users
Spectral range:285 to 3000 x 10⁻⁹ m
Sensitivity (nominal):15 x 10⁻⁶ V/(W/m²)
Rated operating temperature range:-40 to +80 °C
Standard cable length:5 m
Temperature response:<± 1 % (-10 to +40 °C) and <± 0.4 % (-30 to +50 °C) with correction in data processing
Temperature response test of individual instrument:report included
Directional response test of individual instrument:report included
Temperature sensor:Pt100 or 10 kΩ thermistor
Tilt sensor test of individual instrument:report included
Rated operating voltage:5 to 30 VDC range
Optional operation in low power mode::
Operating condition:heater and ventilator [OFF] in low power mode
Zero offset a:5 W/m² (unventilated) in low power mode
Power consumption:< 0.1 W at 12 VDC in low power mode
Output:irradiance in W/m², instrument body temperature in °C, tilt angle in °, internal humidity in % and ventilator speed in RPM
Communication protocol:Modbus over 2-wire RS-485
Transmission mode:RTU



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