Best Data Availability

By keeping the SR25 outer dome free of dew and frost with help of the internal heater, data availability is highly increased over traditional pyranometers, whether these are ventilated or not. The application photo shows the clear difference between SR25 versus a non-heated pyranometer without sapphire dome.

Best Measurement Accuracy

SR25 measures the solar radiation received by a plane surface, in W/m2, from a 180 ° field of view angle. SR25 offers the best measurement accuracy: the specification limits of two major sources of measurement uncertainty have been greatly improved over competing pyranometers: “zero offset a” and temperature response.

SR25 Design

SR25 has a sapphire outer dome, glass inner dome and an internal heater. It employs a state-of-the-art thermopile sensor with black coated surface and an anodized aluminum body. The connector, desiccant holder and sun screen fixation are very robust and designed for long term use.

Suggested Use

Areas of Application