Compared with other instruments of the same type, the SR11 sunshine intensity meter has an extremely high cost performance, complies with ISO-9060 standard, adopts double-layer glass dome design, and has the smallest measurement error. Its thermocouple sensing element can quickly respond to changes in radiation and respond to the entire solar spectrum in a plane. SR11 is suitable for meteorological bureaus, scientific research occasions, and occasions where an accurate assessment of the efficiency of photovoltaic operations is required. Measurement principle: High-precision first-class equipment, suitable for high-demand applications. Compared with other instruments of the same type, the SR11 sunshine intensity meter has an extremely high cost performance, complies with the ISO-9060 standard, and uses dual