Made in Germany

Radiometer is a device used to measure the intensity of radiant energy. Invented in 1873 by the chemist Sir William Crookes as the by-product of some chemical research. It consists of an airtight glass bulb containing a partial vacuum, with a set of rotor blades which are mounted on a spindle inside. The blades rotate when exposed to light, with faster rotation for more intense light, providing a quantitative measurement of electromagnetic radiation intensity.

Using crystal Lauscha glass, these balls are hand made by skilled glassblowers in Thuringia, Germany. The glass foot consists of crystal glass.

Small: ⌀ 70mm
Large: ⌀ 100mm

Sold individually

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Starting from 1 January 2021 the UK VAT amount will be deducted from orders to EU countries. The final price during checkout will reflect the correct VAT rate for the destination country of your order.