SR05
SR05
OrderableISO 9060 Second Class Pyranometer with Analog and RS-485 Modbus Communications
Overview
The SR05, manufactured by Hukseflux Thermal Sensors as the SR05-D1A3, is an ISO 9060:2018 spectrally flat Class C (second class) pyranometer designed for general solar radiation measurements in agricultural and meteorological networks and PV monitoring. Both analog output and Modbus over RS-485 are supported.
Technical Description
The SR05 measures solar radiation received by a plane surface, in W/m², from a 180° field of view angle with a high-quality blackened thermopile protected by a glass dome. The blackened thermopile provides a flat spectral response for the full solar spectrum range, which allows the SR05 to be used under plant canopies or lamps, when the sky is cloudy, and for reflected radiation measurements.
The SR05 produces two different outputs that are measured directly by a Campbell Scientific data logger: a 0 to 1000 mV signal and a Modbus over RS-485 signal.
Benefits
- Industry-standard analog and digital outputs for easy implementation and servicing
- Affordable second class pyranometer, suitable for large networks
- Employs a thermopile sensor with black-coated surface, one dome, and an anodized aluminum body with visible bubble level
Specifications
- Sensor
- Blackened thermopile protected by a dome
- Measurement Description
- Measures hemispherical solar radiation
- Heater
- No
- ISO Classification
- Spectrally flat Class C (second class)
ISO 9060:2018
- IEC 61724-1:2017 Compliance
- Class C
- Digital Output
- Modbus over two-wire RS-485
- Voltage Output
- 0 to 1 V
- Analog Output
- 0 to 1600 W/m2
- Calibration Uncertainty
- < 1.8%
(k = 2)
- Calibration Traceability
- To WRR
- Spectral Range
- 285 to 3000 x 10-9 m
- Operating Temperature Range
- -40° to +80°C
- Rated Operating Voltage Range
- 5 to 30 Vdc
- Communication Protocol
- Modbus over RS-485
- Transmit Range
- 0 to 1600 W/m2
- Power Consumption (Digital)
- < 75 x 10-3 W
(at 12 Vdc)
Accessories
(7)CM256
Adjustable Plane and Angle Solar Mounting Stand
OrderableRS485CBL
Five-Conductor Cable with M12 Five-Pin A-Coded Connector
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
Orderable
Common Accessories
(4)CM256
Adjustable Plane and Angle Solar Mounting Stand
One CM256 is needed per sensor. 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.
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.
OrderableRS485CBL
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.
Orderable
Other Accessories
(3)CM275
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.
Orderable
Replacement Parts
(2)25848
Stainless-Steel M5 Spring Lock Washer
Two of the 25848 are shipped with the SR05. The 25848 \may be purchased to replace a lost or damaged washer.
Orderable2142
Screw #10-32 x .500 Pan Phillips, Stainless Steel
Two of the 2142 are shipped with the SR05. The 2142 may be purchased to replace a lost or damaged screw.
Orderable
Services
(2)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.
Orderable
Ships With
(4)- Certificate of Calibration from Original Manufacturer
- Hukseflux Sensor Manager Software on USB Flash Drive
25848
Stainless-Steel M5 Spring Lock Washer
OrderableQty 22142
Screw #10-32 x .500 Pan Phillips, Stainless Steel
OrderableQty 2
Compatibility
Compatible Products
(7)CR6
High-Capacity Data Acquisition System
OrderableNotes—CR310
Measurement and Control Datalogger
OrderableNotes—MeteoPV
Distributed Solar-Resource-Monitoring Platform
OrderableNotes—CR350
Measurement and Control Datalogger
OrderableNotes—CM255
Solar Adjustable-Angle Mounting Stand
OrderableNotes—CM266
Unistrut Mount
OrderableNotes—CM268
PV Module Mount
OrderableNotes—
Related Resources
Documents
- Manual
SR05 ISO Spectrally Flat Class C (Second Class) Pyranometer with Various Outputs
September 2026
View Document - Brochure
SR05 ISO 9060 Second Class Pyranometer
March 2026
View Document - Compliance
SR05 EU Declaration of Conformity
December 2015
View Document - Technical Paper
Modbus Troubleshooting Guide
April 2026
View Document
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