SR15 digital pyranometer series is an all-digital range of solar radiation sensors applied in general high-accuracy observations. SR15 pyranometers comply with the “first class” specifications according to the ISO 9060:1990 standard and “spectrally flat class B” requirements in the 2018 revision. Version SR15-D2A2 offers Modbus over TTL, and 4-20 mA current loop output.
Improved Measurement Accuracy
Calibration of SR15 pyranometer has been improved; our latest calibration method results in an uncertainty of the sensitivity of 1.8 %, compared to typical uncertainties of higher than 2.8 % for this pyranometer class. SR15’s response time is < 10 s, a significant improvement relative to earlier sensors and competitors.
Use as Sunshine Duration Sensor
WMO has approved the “pyranometric method” to calculate sunshine duration from pyranometer measurements in WMO-No. 8, Guide to Meteorological Instruments and Methods of Observation. This implies that SR15 may be used, in combination with appropriate software, to estimate sunshine duration. This is much more cost-effective than using a dedicated sunshine duration sensor. Ask for our application note.
Suggested Use
Areas of Application
Accessories
| Measurand | hemispherical solar radiation |
|---|---|
| ISO 9060:2018 classification | Spectrally flat Class B (first class) |
| IEC 61724-1:2017 compliance | Class C |
| Application | National Meteorological NetworksPV monitoring commercial and utility scalePV monitoring small sized meteorology / climatology, other |
| Heater | No |
| Output | 4-20 mA current loopModbus TTL |
| Calibration uncertainty | < 1.8 % (k = 2) |
| Calibration traceability | to WRR |
| Spectral range | 285 to 3000 x 10⁻⁹ m |
| Response time | < 10 s |
| Zero offset a | 5 W/m² unventilated |
| Rated operating temperature range | -40 to +80 °C |
| Temperature response | < ± 2 % (-10 to +40 °C) |
| Standard cable length | 5 m |
| Levelling | optional spring-loaded levelling, with or without tube mount |
| Communication protocol | Modbus over TTL |
| Transmission mode | RTU |
| On-board heater | Not included |
| Analogue output | 4-20 mA current loop |
| Version order codes | SR15-D2A2, SR15-D2A2-LM01, SR15-D2A2-TLM01 |
| Options | • Spring-loaded levelling; practical for easy mounting, levelling and instrument exchange on flat surfaces (LM01) |
