Pyrheliometer DR20-A1

DR20-A1 is a high-accuracy, direct (normal incidence) solar radiation sensor, also known as pyrheliometer. DR20-A1 complies with Class A specifications of the ISO 9060:2018 standard. This instrument is designed for tracker-mounted operation and offers analog millivolt outputs. The pyrheliometer has superior window heating that leads to high data availability by mitigating dew and frost. Improved temperature response Hukx’s DR20-A1 pyrheliometer is a new Class A instrument with an improved temperature response compared to DR15-A1. Both instruments offer the highest accuracy and data availability, featuring window heating at low offsets. At the same heating power, the heating has been improved by a factor of 4, at just a quarter of the offset! DR20-A1 is engineered for high-accuracy measurement of direct solar radiation—also known as Direct Normal Irradiance (DNI)—received by a plane surface from a 5 ° full field of view angle. DNI is expressed in W/m2. For optimal results, the instrument must be mounted on a two-axis tracker to stay pointed at the sun. Heated for high data availability High data availability is attained by heating the front window, which suppresses dew and frost deposition at a very low power consumption. DR20-A1 only requires 1 W to keep their window free from dew and frost. Liabilities covered: test certificates As required by ISO 9060 for Class A classification, each DR20-A1 is supplied with test results for the individual instrument: sensitivity response time temperature response Instrument use The DR20-A1 pyrheliometer is designed for tracker-mounted operation.