Crookes Radiometer 12.5 cm Glass Ball with 4 Blades on Black Base Demonstrator of Thermal Insulation with Window Film Light Mill
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The Crookes radiometer is a scientific instrument that converts light and heat into movement, which is visible at first glance. Inside the transparent glass ball, a rotor with blades is mounted on a thin axis, which spins automatically when sunlight or radiation from a heat lamp strikes it. This model stands on a stable black base in the shape of a truncated pyramid, allowing it to remain firmly on tables, counters, or dashboards of demonstration stations. The radiometer does not require batteries, cables, or any other power source; it is powered solely by incoming light. Therefore, it is ready for use immediately after unpacking.
The manufacturer designed it primarily as a demonstrator of thermal insulation with window film. If you place two radiometers side by side and cover one with glass containing the film, the difference in the speed of the blade rotation will clearly show how much heat the film retains. Such a demonstration is useful for car workshops, car dealers, and companies that install window films, as customers can see the effect of the film right before their eyes. The rotor consists of 4 blades, one side of which is dark and the other light and shiny. The dark side absorbs more heat than the light side, causing the entire rotor to spin. The stronger the radiation, the faster the blades rotate.
- Type – Crookes radiometer or light mill
- Dimensions – 12.5 x 9 x 9 cm
- Height – 12.5 cm
- Base Width – 9 cm
- Ball Material – glass
- Rotor – 4 blades with dark and light sides
- Base – black in the shape of a truncated pyramid
- Power – sunlight or heat lamp, no batteries
- Use – demonstration of thermal insulation with window film, teaching physics, decoration
- Package Contents – 1 Crookes radiometer with glass ball on black base
Place the radiometer in a spot where direct sunlight falls on it, or illuminate it with a heat lamp. In low light, the blades will spin slowly or remain stationary. The ball is made of glass, so handle it carefully and protect it from falls and impacts. Dust from the surface of the ball can be wiped off with a soft dry cloth. When transporting, hold the radiometer by the base, not by the glass ball.
The Crookes radiometer with a height of 12.5 cm combines a practical demonstration tool with an interesting showcase of a physical phenomenon. It helps sellers and installers of window films explain the difference between films to customers without lengthy discussions. In schools or at home, it serves as a visual aid when teaching about light and heat. On a desk or in an office, it captivates with blades that spin whenever sunlight hits them. It also makes a great gift for those interested in physics and technology. The package contains one radiometer on a black base, ready for immediate use.
Delivery
Delivery to address€1.99
Estimated delivery: 23 November – 4 December
Shipped from China
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Returns addressQX-BOX AEMALL RETURN
Rotonda Rene Descartes, Parcela 101 – Nave 3
28070 Alcala de Henares, Madrid
SpainReturns centre in Spain operated by Qxbox, an e-commerce logistics provider and logistics partner of the sellers on our platform.
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About the seller
This product is sold and shipped by an external seller. LUNZO guarantees you a safe purchase: online payments go through a secure payment gateway, and you handle your order, returns and complaints with us.
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Seller:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
Manufacturer:
Gansu Constar Technology Group Co., Ltd.
Address: No.10, Chuangxin South Road, Baiyun District, Baiyun, Gansu, China
E-mail: ksdjt@foxmail.com
Telephone: +86 156 9392 3686
EU responsible person:
BioDomi GmbH
Address: Schokoladenring 13, 65795 Hattersheim am Main, Germany
E-mail: arcontact@biodomieurope.de
Telephone: +49 178 5749814
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