Sunmeter Pro – Accurate, Reliable Photovoltaic Pyranometer

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Sunmeter PRO is a digital photovoltaic pyranometer (or silicon irradiance sensor) for calculating photovoltaic plant performance with a high degree of precision and reliability. Its monocrystalline silicon cell is laminated with glass for photovoltaic modules and E.V.A. like a micro PV module. It has additional stabilization processes and tests to minimize measurement drift over time. The cost includes a recalibration service after one year as well as the immediate replacement of the irradiance sensor if tolerance exceeds 3.5%. The Sunmeter PRO is  easy to install and use. Compared to the Class A thermopile pyranometer, it provides a more adequate measure for the calculation of the P.R.. Every Solarimeter cell has been calibrated by a stabilized PV reference cell at the Dakks accredited ISFH. This irradiance sensor is available in two models:
  1. the “complete model” which provides for Analog and Digital output.
  2. the digital output only model.
Note: the terms irradiance sensor, photovoltaic pyranometer, reference cell and solarimeter are interchangeable. On this site we will use photovoltaic pyranometer. To learn more click here.

Key features

  • Monocrystalline silicon cell
  • Inbuilt TZOS® technology for measurement
  • IEC 60904-2 compliant, RS485 standard Modbus RTU for reliable signals up to 500m from the data-logger
  • IEC EN 61724-1:2017  compliant (standard for PV Monitoring Systems)
  • Uses temperature compensation for more accurate reading.
  • Performance decline of less than 1.5% per year.
  • Analog and digital output, compatible with most of data-loggers.
  • Higher weather resistance.
  • IEC EN 61215 par.10,11,12 compliant (product aging).
  • Mounting brackets for easy installation.
  • High calibration of temperature data for an error less than 1%
  • FREE 12 month recalibration service included.


PRODUCT solar irradiance sensor with monocrystalline silicon cell (photovoltaic pyranometer)
REFERENCE STANDARDS IEC 60904-2; 60904-4; 60904-10; IEC EN 61215, EN 61215
OUTPUT Digital and Analog (when ordering, specify the model)
Calibration Made through a double adjustment for comparison with a PV reference cell calibrated by the Dakks accredited ISFH Institute.
Input range Irradiance: 0 ÷ 1500 W/m2 (IEC EN 61724-1:2017 compliant)    
Spectral range 0.3 μm ÷ 1.1 μm
Temperature -30 ÷ +90 °C
Output Voltage(1) 0 ÷ 10 V, 0 ÷ 5 V (optional kit for 0 ÷ 40 mV)
Current(1) 0÷ 20 mA, 4÷ 20 mA
Digital RS485 standard Modbus RTU
Output precision Irradiance ≤± 2%
Temperature ≤± 0.5°C
Supply 9 ÷ 30 Vdc protected from reverse polarity and short circuiting
Encapsulation Laminated with glass for photovoltaic modules, E.V.A. UV resistant (see IEC 60904-2)
Casing Aluminum with screw-clamp for mounting
Wire 50cm UV-resistant casing.
Connectors Standard M12 8 pin male IP67 code
Dimensions 114x70x22mm without the fixing clamp
(1): The analog output is present only in the models on wire # 6 of the SM1 PRO. Wire # 6 can be configured as  voltage or current output.                                                           
(2): Digital RS485 is always present on wire n#4 and n#5


  • Temmeter

  • USB/RS485 interface cable

  • USB/MICRO-USB smartphone adapter

  • Sm configuration for Android smartphone and tablet

    SMCONFIG allows you to configure Sunmeter in the field from your Android smartphone. It is no longer necessary to bring the Sunmeter back to the laboratory for configuration. The software allows you to:
    • configure Sunmeter.
    • make a diagnosis of the basic functions.
    • log irradiance, temperature and wind (Sunmeter Wind only) readings.
    The software is available for free on this page in the downloads area. In addition to the software it is necessary to have a USB / RS485 converter, an adapter cable between microUSB/USB and a female connector M12 4 pin for Sunmeter. In the Download area you can find a wiring diagram of our cable that connects Smartphone/Tablet or PC with the irradiance sensor, it takes and transforms the voltage present on the USB (Price on request). Alternatively, it is possible to use other cables with external power supply (9V battery).


Producer Datalogger / Inverter model
Huawei SmartLogger 1000/2000/3000 (Table 8.2 of Huawei SmartLogger3000 User Manual)
SMA Data Manager M
SolarEdge SE Gateway Datalogger*
Meteocontrol BlueLog
Growatt ShineMaster Datalogger
Kaco Kaco Inverter
Sungrow Sungrow Datalogger
GoodWe EZlogger
* only for the complete model (Analog & Digital output) of Sunmeter because SE Gateway Datalogger is a datalogger with Analog Input

Protection against lightening

Protects irradiance sensors and photovoltaic monitoring equipment from lightening induced overvoltages. Discover Blitz-Wall!


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