SR30
SR30
OrderableClass A Pyranometer with RS-485 Modbus Communications with Integrated Heating and Ventilation
Overview
The SR30, an ISO 9060:2018 spectrally flat Class A (secondary standard) pyranometer manufactured by Hukseflux, features Recirculating Ventilation and Heating (RVH™) technology. As a standalone unit, the SR30 is fully compliant with IEC 61724-1 standards, whereas other pyranometers would require external ventilation/heating units to be compliant. The SR30 is an ideal instrument for solar resource and PV performance monitoring.
Benefits
- Heated for high data availability, featuring RVH™ technology
- Compliant with IEC 61724-1:2021 Class A
- Remote sensor diagnostics
Specifications
- Sensor
- High-quality blackened thermopile protected by two glass domes with integrated heater and ventilation
- Measurement Description
- Monitors solar radiation for the full solar spectrum range
Hemispherical Solar Radiation
- Heater
- RVH™
(Recirculating Ventilation and Heating)
- ISO Classification
- Spectrally flat Class A (secondary standard)
ISO 9060:2018
- IEC 61724-1:2021 Compliance
- Class A
- Calibration Uncertainty
- < 1.2%
(k = 2)
- Heating
- Included
- Ventilation
- Included
- Technology Employed
- Recirculating Ventilation and Heating
(RVH™)
- Standard Operating Mode
- Heated and ventilated
- Power Consumption @ 12 Vdc
- < 2.3 W
- 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
- Digital output
- Operating Temperature Range
- -40 to +80°C
(rated)
- Temperature Response
- < ±0.4%
(-30 to +50°C)
- Temperature Response Test of Individual Instrument
- Report included
- Directional Response Test of Individual Instrument
- Report included
- Rated Operating Voltage Range
- 8 to 30 Vdc
Sensor Tilt Angle
- Tilt Measurement Uncertainty
- ±1°
(0 to 90°)
- Tilt Sensor Test of Individual Instrument
- Report included
Operation in Low-Power Mode
- Operating Condition
- Heater and ventilator [OFF]
- Zero Offset A
- 5 W/m2
(unventilated)
- Power Consumption @ 12 Vdc
- < 0.1 W
Digital Output
- Output
- Modbus RS-485Irradiance in W/m2Instrument body temperature in °CTilt angle in °Internal humidity in %Ventilator speed in RPM
- Communication Protocol
- Modbus over two-wire RS-485
- Transmission Mode
- RTU
Accessories
(10)RS485CBL
Five-Conductor Cable with M12 Five-Pin A-Coded Connector
OrderableCM256
Adjustable Plane and Angle Solar Mounting Stand
OrderableCM261
Single-Axis Tracker Mounting Stand
Orderable33973
RS-485 to USB Converter
OrderableCM275
Albedometer Mounting Kit
Orderable39131
DIN Rail Terminal Kit with 2 Terminals and 6 Wires
Orderable39643
RS-485 DIN Rail Terminal Bus Kit without Mounting Bracket
OrderableCM266
Unistrut Mount
OrderableCM268
PV Module Mount
OrderableCM410
Pile Mount Arm (no finish or matte black finish)
Orderable
Common Accessories
(6)RS485CBL
Five-Conductor Cable with M12 Five-Pin A-Coded Connector
The RS485CBL cable uses a five-conductor shielded cable with an M12 five-pin A-coded connector. The cable has a polyurethane jacket that is UV resistant. The RS485CBL has been custom designed for sensors that use the RS-485 Modbus protocol with integrated power and signal lines. The signal lines have twisted pairs with 24-gauge conductors, and the power lines have a heavier 20-gauge wire, making the cable uniquely suitable for sensors with a higher current draw that have either short or long runs. An aluminum Mylar shield is grounded via a drain wire and connected to the M12 nut.
OrderableCM256
Adjustable Plane and Angle Solar Mounting Stand
The CM256 adjustable-angle, adjustable-plane mounting stand further simplifies the accurate and precise mounting of a pyranometer, ventilation unit, shadowband radiometer, or reference cell. Several pyranometer mounting stands have been combined and simplified to make ordering easier and usability friendlier. The CM256 is a combination of the CM255LS pyranometer mount, CM245 reference cell and shadowband mount, 31394 VU01 mount, and 31153 CVF4 mount. In addition, several new sensors are now fully supported such as the SPN1, MS-80(M), SR30, SR05, and IMT reference cell CM325.
OrderableCM261
Single-Axis Tracker Mounting Stand
One CM261 is needed per CVF4. The CM261 single-axis tracker pyranometer mount with adjustable plane simplifies the mounting of any pyranometer, ventilation unit, reference cell, or SPN1 to octagonal, round, and square single-axis torque tubes. The CM261 is a combination and simplification of the CM260 and CM265 to make ordering easier and usability friendlier. The bracket includes provisions for mounting the sensors and ventilation units at different heights, allowing the sensing element to be mounted at the same height as the solar modules.
OrderableCMB200
Crossarm Brace Kit
The CMB200 may be used with a crossarm to provide additional stability when mounting on Campbell Scientific tripods and towers. This kit provides support for crossarms with heavier or sensitive sensor loads, as well as added stability in higher winds.
Orderable39131
DIN Rail Terminal Kit with 2 Terminals and 6 Wires
The 39131 provides the needed DIN rail terminals, separator, and wires to connect any product to a data logger or other peripheral that requires six wires for connection. This kit provides the following wires: black, light blue, green, red, white, and clear. The color-coding of these wires matches the wire coloring of the product for ease in connection, maintenance, and troubleshooting.
Orderable39643
RS-485 DIN Rail Terminal Bus Kit without Mounting Bracket
The 39643 makes it easier for you to connect wires from multiple RS-485 sensors into one set of terminals on a data logger. The 39643 uses six DIN-rail mountable (pn 27479), 6-wire terminal blocks. The 39643 is a jumper that electrically connects two terminal blocks together at a time (pn 32918). This setup allows up to 17 RS-485 sensors to be connected to one set of terminals on a data logger.
Orderable
Other Accessories
(5)33973
RS-485 to USB Converter
The 33973 is an RS-485 to USB converter.
OrderableCM275
Albedometer Mounting Kit
The CM275 is a universal solar albedo mounting stand for mounting any downwelling/upwelling combination of pyranometer, ventilation unit, reference cell, or spectral radiometer.
OrderableCM266
Unistrut Mount
The CM266 is a true universal irradiance sensor mount. Its design makes use of the ubiquitous construction material, Unistrut. Attach your irradiance sensors anywhere you can mount a section of Unistrut.
OrderableCM268
PV Module Mount
The CM268 irradiance sensor mount is designed so you can make irradiance measurements as close to the modules/panels as possible. The mount can be clamped to the panel side, allowing for more representative and distributed measurements throughout the array. Note: Although the CM268 is designed to fit many solar frames, Campbell Scientific recommends confirming that the frame of the intended solar panel is compatible with the mount.
OrderableCM410
Pile Mount Arm (no finish or matte black finish)
The CM410 is used primarily to mount a pair of pyranometers to a driven pile, leveraging the CM275 Albedometer Mounting Kit. The included 15.24 cm (6.0 in.) hook bolts accommodate an I-beam style pile with flange dimensions 7.6 to 12.7 cm (3 to 5 in.), such as a W6x12. Albedo is a common measurement parameter selected for a SunSentry Solar Operational Meteorological Monitoring Station. Installation details, including the recommended pile exposure height and orientation, are found in the SunSentry Installation Guide. To minimize localized glare and reflections that can adversely influence albedo measurements, the all-black version of the CM410 is recommended for albedo.
Orderable
Replacement Parts
(2)34512
M6 x 25 mm Stainless-Steel Screw with 1 mm Thread Pitch and Hex Socket Head
The 34512 is used to secure the pyranometer to an adjustable-angle solar sensor mounting stand.
Orderable31373
M6 18-8 Stainless-Steel External Tooth Lock Washer
The 31373 is commonly used with the 34512 screw to secure the pyranometer to the adjustable-angle solar sensor mounting stand.
Orderable
Services
(3)33475
Pyranometer ISO 17025 Accredited Calibration to ASTM G167 and ISO 9846 with Data
The 33475 calibration service is performed using an intermittent shade method with a World Radiometric Reference (WRR) traceable AHF cavity radiometer. The 33475 calibration is ISO 17025 accredited to the following standards: ASTM G167 and ISO 9846.
Orderable33476
Solar Sensor ISO 17025 Accredited Calibration to ASTM E824 with Data
The 33476 calibration service is performed using a reference group of pyranometers traceable to World Radiometric Reference (WRR). This calibration is ISO 17025 accredited to ASTM E824 standard.
Orderable33477
Solar Sensor Calibration with ISO 17025 Accredited Calibration to ASTM G207 Available for Some Sensors
The 33477 calibration service is performed indoors using a reference pyranometer of the same make and model. Reference pyranometers are traceable to the World Radiometric Reference (WRR). This calibration is ISO 17025 accredited to ASTM G207 standard.
Orderable
Ships With
(5)- ISO 9060 Certificate of Calibration, Temperature Response Test Report, Directional Response Test Report, and Tilt Sensor Test Report
- Sun Screen from original mfg
- Hukseflux Sensor Manager Software on USB Flash Drive
34512
M6 x 25 mm Stainless-Steel Screw with 1 mm Thread Pitch and Hex Socket Head
Orderable31373
M6 18-8 Stainless-Steel External Tooth Lock Washer
Orderable
Related Resources
Documents
- Technical Paper
Modbus Troubleshooting Guide
April 2026
View Document - Brochure
SR30 Class A Pyranometer
March 2026
View Document - Manual
SR30 ISO Spectrally Flat Class A (Secondary Standard) Pyranometer
February 2026
View Document - Compliance
SR30-L EU Declaration of Conformity
January 2017
View Document
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