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SR05-D1A3 pyranometer

Digital second class pyranometer with Modbus RS-485 and 0-1 V output
SR05 series is the most affordable range of pyranometers meeting ISO 9060 second class requirements. SR05 measures solar radiation received by a plane surface, in W/m², from a 180 ° field of view angle. It is ideal for general solar radiation measurements in (agro-)meteorological networks and PV monitoring. The pyranometer is easy to mount and install, in particular with SR05’s ball levelling mechanism. Version SR05-D1A3 offers Modbus over RS-485 and 0-1 V output.
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SR05 pyranometer mounting and levelling

Optionally SR05 has a unique ball levelling mechanism and tube mount for easy mounting and levelling on a (non-)horizontal surface or tube.

Design and output

SR05 pyranometer employs a thermopile sensor with black coated surface, one dome and an anodised aluminium body with visible bubble level. SR05 has a variety of industry standard outputs, both digital and analogue:

  • SR05-D1A3: digital sensor with Modbus over RS-485 and analogue 0-1 V output
  • SR05-D2A2: digital sensor with Modbus over TTL and analogue 4–20 mA output
  • SR05-A1: analogue sensor with analogue millivolt output


Measurand hemispherical solar radiation
ISO 9060:2018 classification spectrally flat Class C (second class)
IEC 61724-1:2017 compliance Class C
Application PV monitoring small sized
Heater no
Output 0-1 V
Calibration uncertainty < 1.8 % (k = 2)
Calibration traceability to WRR
Spectral range 285 to 3000 x 10⁻⁹ m
Rated operating temperature range -40 to +80 °C
Standard cable length 3 m
Rated operating voltage 5 to 30 VDC range
Levelling optional ball levelling with / without tube mount
Output :
Communication protocol Modbus over RS-485
Digital output irradiance in W/m² and instrument body temperature in °C
Analogue output 0-1 V
Transmitted range 0-1600 W/m²
Version order codes SR05-D1A3, SR05-D1A3-BL, SR05-D1A3-TMBL

  • longer cable lengths (10, 20 metres)
  • extension cable with connector pair (10, 20 metres)
  • with ball levelling (BL01)
  • with ball levelling and tube mount (for tube diameters 25 to 40 mm) (TMBL01)
  • OEM versions


Suggested use

  • general solar radiation measurements
  • (agro-)meteorological networks
  • PV power plant monitoring
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