Kipp & Zonen designed the CSD 3 Sunshine Duration Sensor to replace the subjective Campbell-Stokes recorder. It is engineered for continuous outdoor use and is easy to install and service. Making Sunshine duration monitoring much more accurate than checking burn marks on a card that may have been damp or incorrectly filed.
The CSD 3 is used for monitoring sunshine duration and automates the process previously undertaken by a traditional Campbell-Stokes recorder. The CSD 3 measures solar radiation through a high quality glass tube. It has no moving parts and uses 3 photo-diodes with specially designed diffusers to make an analogue calculation of when it is sunny. The output is switched high or low to indicate sunny or not sunny conditions. The calculated direct irradiance value is also available as a 1mV = 1W/m². The CSD 3 includes an externally controlled two level built in heater, with optional thermostat control, and a robust mounting arm for easy installation.
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