Heliothermometer Posted on 15th November 20155th September 2020 by ThePD (The Project Definition) A Heliothermometer is a device for measuring of the intensity of solar radiation. Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Related Posted in Technology and tagged energy, renewable, solar, technology. ThePD (The Project Definition) ThePD has been developing the Preferred Project Definitions based on the actual project execution and operation experiences and knowledge with the Project Language, and sharing with you daily basis.