SR20 is a pyranometer of the highest category in the ISO 9060 classification system: secondary standard. This solar radiation sensor is used where the highest measurement accuracy is required. It measures the solar radiation received by a plane surface, in W/m², from a 180 ° field of view angle. SR20 secondary standard pyranometer enables you to attain the highest measurement accuracy and excels in demanding applications. After a thorough programme of acceptance testing, SR20 was released February 2013. It offers analogue millivolt output.

• Highest category in the ISO 9060 classification system
• Low temperature dependence makes it an ideal candidate for use under very cold and very hot conditions
• Uses a state of the art thermopile sensor with black coated surface, two domes and an anodized aluminum body