SR20-D2 Pyranometer

Options

• Longer cable, in multiples of 5 meters
• Transmission range tailored for 4-20 mA output
• Ventilated with VU01 ventilation unit

The best pyranometer for the PV industry
SR20-D2 is the most accurate secondary standard digital pyranometer available. Your benefits:

• Digital output – easy implementation and maintenance
• Best-in-class temperature response, < ± 0.4 % (-30 to +50 °C), best “zero-to drift” and best calibration uncertainty
• Test certificates for temperature response and directional response included as required by ISO 9060
• Recalibration records fully accessible to users

To improve overall measurement accuracy, Hukseflux effectively addressed two main sources of measurement uncertainty: calibration and “zero-to drift”.
Furthermore, SR20-D2 has negligible temperature response. All are best in class. The temperature response of each individual instrument is tested and corrected on board by the instrument electronics, using a second-degree polynomial. The low temperature dependence of the SR20-D2 makes it the ideal candidate for use in very cold and very hot conditions

SR20-D2 Pyranometer Design
The pyranometer employs a state-of-the-art thermopile sensor with a black coated surface, two domes and an anodized aluminum body. The connector, desiccant holder and sun shield attachment are very robust and designed for long-term industrial use. The SR20-D2 uses a high-end 24-bit A/D converter. All parts are specified for use over the entire nominal operating temperature range of the SR20-D2. The SR20-D2 offers two types of outputs that are commonly used in the solar PV industry: digital output via Modbus RTU over 2-wire RS-485 and analog 4-20 mA output (current loop).

Suggested use

• PV system performance monitoring
• All networks with regular instrument exchange
• Scientific meteorological observations
• Reference instrument for comparison
• Extreme climates (tropical/polar)