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Solar Radiometers Shop

Solar radiometers are also known as light mills because light moves their blades as opposed to wind for windmills. They consist of an airtight bulb containing a partial vacuum. Inside the glass bulb is a fine vertical spindle with a set of vanes mounted at the top. When the glass bulb is exposed to light, the weather vanes are propelled around, the speed of propulsion increases with the intensity of light, providing a qualitative way of measuring electronmagnetic radiation. These days the Solar radiometer, or Crooke's radiometer (named after Sir William Crooke who invented them), is more of a beautiful science gizmo than a means of accurate measurement. Our Solar Radiometer shop stocks a range of exquisite radiometers which make unusual and interesting gifts for scientists and science enthusiasts. For a great explanation of how radiometers work, check out the video.
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  1. Glass Double Layer Solar Radiometer

    Glass Double Layer Solar Radiometer

    Solar radiometers are also known as light mills because light moves their blades as opposed to wind for windmills. They consist of an airtight bulb containing a partial vacuum. Inside the glass bulb is a fine vertical spindle with a set of vanes mounted at the top. When the glass bulb is exposed to light, the weather vanes are propelled around, the speed of propulsion increases with the intensity of light, providing a qualitative way of measuring electronmagnetic radiation. These days the Solar radiometer, or Crooke's radiometer (named after Sir William Crooke who invented them), is more of a beautiful science gizmo than a means of accurate measurement. Learn More
  2. Glass Hanging Solar Radiometer - Clear 80mm Sphere

    Glass Hanging Solar Radiometer - Clear 80mm Sphere

    The Solar Radiometer ball with drop for hanging is the basic type of radiometer . The sphere is made of crystal Lauscha glass. In the glass body of the light mill is a rotor turned by light. The ball is on the top with a glass eye for hanging and at the bottom with a glass hook for another hanging radiometer. This article has the protected trademark of the Thuringian glassblower federation. Learn More
  3. Glass Hanging Solar Radiometer with Hook and Peak

    Glass Hanging Solar Radiometer with Hook and Peak

    Hanging Radiometer with Hook and Peak Hanging Radiometer with Hook and Peak Learn More
  4. Glass Seahorse Solar Radiometer

    Glass Seahorse Solar Radiometer

    Clear Solar Radiometer sphere with a glass seahorse stand. In a vacuum inside a free-standing globe the vanes constantly revolve in sunlight. The simplest possible demonstration of solar power. The radiometer is made by traditional Thuringian hand-blowing in Germany, of crystal-clear Lauschaer bottle glass. In the glass body is a 4-vane drive assembly, which turns under the influence of light. One side of each vane is black, the other is silver. Height: ca. 23 cm. (9 in) Globe diameter: ca. 8cm. (3. 25 in) The Crookes radiometer was invented by the chemist Sir William Crookes as the by-product of some chemical research. In the course of very accurate quantitative chemical work, he was weighing samples in a partially evacuated chamber to reduce the effect of air currents, and noticed the weighings were disturbed when sunlight shone on the balance. Investigating this effect, he devised the device named after him, still manufactured and sold to this day as a curiosity item. Learn More
  5. Glass Solar Radiometer - Clear Globe on a Clear Venetian Stem

    Glass Solar Radiometer - Clear Globe on a Clear Venetian Stem

    This Solar Radiometer on a venetian stem features innovative design. The globe is made of clear Lauschaer crystal glass. In the glass globe is a 4-vane drive assembly, which turns under the influence of light. One side of each vane is black, the other is silver. The clear glass stem and foot are made by Lauschaer ribbed glass. Learn More
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