Oregon State University

How to build an effective, economic radiation shield for thermometers

Thomas & Smoot (2013):Radiation shield intercomparison using thermal Infrared camerasNew publication: We present the design and evaluate the performance of a double-walled electrically aspirated radiation shield for thermometers measuring air temperature and its gradients in the atmospheric surface layer. Commercially available shields are often cost-prohibitive and require significant power, which aggravates their use in remote sensor networks. We performed rigorous tests to quantify its solar radiation error and wake production, and to characterize the observer effect of the forced aspiration on vertical temperature gradients in the calm and stable boundary layer. Construction requirements were to design a unit that uses inexpensive off-the-shelf components, to assemble easily, to facilitate reconfiguration to accommodate various sensors, and to reduce power consumption with the goal of reducing costs and enabling use in sensor networks in remote locations. The cost savings compared to a commercially available triple walled shield of equal performance are on the order of several hundred dollars since the presented shield costs only about 50 USD.

Full citation:

Thomas, C.K., Smoot, A.R., 2013. An effective, economic, aspirated radiation shield for air temperature observations and its spatial gradients. J. Atmos. Ocean. Technol. 30, 526–537. DOI: 10.1175/JTECH-D-12-00044.1

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