Visualize the Sun’s energy with the Solar Energy Radiometer
The Solar Radiometer, a Functional and Useful Accessory
The solar radiometer measures the flow of electromagnetic radiation in a room. Its black helically-mounted blades in a half-air bulb capture the rays of light. This creates a thermal difference between the black and grey surfaces, which generates the energy needed to activate the movement of the blades. The more your environment is exposed to solar radiation, the greater the speed of the blades, enabling you to take the necessary steps to protect your health.
An Energy Radiometer for every occasion
The solar energy radiometer is mounted on a tall, sturdy glass stand with a flat, circular base. It can therefore be easily moved from a sunny room to an open space. You can use it to decorate your premises or embellish your garden during a reception. The fineness of the glass used guarantees the sensitivity of this radiometer.
Solar Radiometer Features
- Material: glass
- Dimensions: 20.5 cm x 9 cm
- Style: Solar Energy Radiometer
- Stand on a piece of furniture in the sun
- Science gift idea
Frequently Asked Questions
How does the Solar Radiometer work?
Inside the bulb, most of the air is removed. The black and grey vanes are warmed unevenly by light, and this makes them spin faster in stronger light.
Is it a precise measuring instrument?
No. It shows whether light is stronger or weaker by how fast the vanes spin, but it is a science demonstration rather than a precision meter.
What is it made of and how big is it?
It is made of glass and measures 20.5 cm x 9 cm. It sits on a tall glass stand with a flat, circular base.
Can I move it around?
Yes. The stand makes it easy to move from a sunny room to an open space, or to use it as a garden decoration.
Lab protocol What we guarantee with this order Carefully packed to arrive in one piece.






















Dave Wilson –
nice to look at, but was a bit disappointed when the instructions inside were only in German. Managed to figure it out with a bit of googling, but it’s not what you’d expect.
Sarah Brown –
This Solar Radiometer is a real conversation starter on our coffee table. Although it’s a bit smaller than I imagined, it works beautifully when the sun hits it.
Tom Harris –
Been a fan of these gadgets for ages and this one is quite good. Just wish the base was a tad sturdier, feels a bit lightweight. Still, it spins well under the sun!
Janet Patel –
My grandson was absolutely chuffed with this radiometer! The smile on his face when it started twirling in the sunlight was worth everything.
Margaret Hollis –
bought this for my grandson Alfie who’s nine and he hasn’t left it alone since. He sat it on the windowsill and nearly fell off his chair when the little vanes started whizzing round. Now he’s dragging it into the garden to see how fast he can get it going. Cracking gift.
Daniel Pritchard –
Spot on. The vanes spin faster the brighter the light, and I love that it looks rather smart on my bookshelf too.