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  • VIDEO
DORAMI Clear Solar Power Crookes RadiometerDORAMI
  • DORAMI Clear Solar Power Radiometer Sun Light Energy Spinning Vanes
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DORAMI Clear Solar Power Radiometer Sun Light Energy Spinning Vanes

4.2 out of 5 stars 727 ratings
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Purchase options and add-ons

Brand DORAMI
Theme Science
Age range (description) Adult
Item dimensions L x W x H 16 x 10.4 x 10.2 Centimetres
Educational objective Imagination Development
Assembly required No
UPC 602463521995

About this item

  • When you put the radiometer in the sun, the vanes will keep spinning.
  • Put it in the office or the living room is very beautiful.
  • It is a creative gift, we can send it to our friends or family.They will love it!
  • It is also a good physics teaching tool. It can visually show that light can be transformed into power.
  • It is made of glass,so it is fragile. It is suitable for children over 14 years of age.
› See more product details

Product information

Technical Details

Educational objective(s) ‎Imagination Development
Language: ‎English
Assembly Required ‎No
Batteries Required? ‎No
Batteries Included? ‎No
Material type(s) ‎glass
Colour ‎Clear
Manufacturer reference ‎unknown
Product Dimensions ‎16 x 10.39 x 10.21 cm; 100 g
ASIN ‎B075CRFG38

Additional Information

Customer Reviews
4.2 out of 5 stars 727 ratings

4.2 out of 5 stars
Â鶹Çø Rank
Date First Available Oct. 23 2017
Manufacturer DORAMI

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DORAMI Clear Solar Power Radiometer Sun Light Energy Spinning Vanes

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DORAMI Clear Solar Power Radiometer Sun Light Energy Spinning Vanes
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Product description

Crookes Radiometer is an ancient product, invented by British physicist William Crookes in 1875.

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Customer reviews

4.2 out of 5 stars
727 global ratings

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Customers say

Customers like the functionality and appearance of the science fundamentals kit. They mention it works great, is an amazing piece of decor, and a cool accessory for a window sill.

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FunctionalityAppearance
5 customers mention "Functionality"5 positive0 negative

Customers are satisfied with the functionality of the product. They mention it works great and is an excellent and unique item a must-have for scientists.

"Works great" Read more

"A really amazing piece of decor, works like a charm, I am really interested in this, Great idea." Read more

"Great product, works as advertised" Read more

"verry good" Read more

3 customers mention "Appearance"3 positive0 negative

Customers like the appearance of the product. They mention it's an amazing piece of decor, neat, and unique. Some say it's a cool accessory for a window sill.

"A really amazing piece of decor, works like a charm, I am really interested in this, Great idea." Read more

"I put this in my office in a window sill. It's a neat product to see it spin when it starts to get sunny out." Read more

"A excellent & unique item a must have for the scientist in all of us!..." Read more

Top reviews from Canada

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  • Magron Starr
    5.0 out of 5 stars these are cool
    Reviewed in Australia on January 28, 2024
    Verified Purchase
    great science toy now i have one
    Report
  • Â鶹Çø ¥«¥¹¥¿¥Þ©`
    4.0 out of 5 stars ¤Û¤Ã¤³¤ê
    Reviewed in Japan on January 7, 2024
    Verified Purchase
    Ì«Ñô¤ÎµÆ¤ê¤Ç…g¤ËÓ𤬻ؤë¤À¤±¤Î¤â¤Î¤Ç¤¹¤¬¡¢Ó𤬤¯¤ë¤¯¤ë»Ø¤Ã¤Æ¤¤¤ë˜”×Ó¤ò¼û¤Æ¤¤¤ë¤À¤±¤Ç¤Û¤Ã¤³¤ê¤·¤Þ¤¹¡£
    Report
  • Nate
    5.0 out of 5 stars First one I ever tried. Gets whippin' in broad daylight.
    Reviewed in the United States on June 18, 2025
    Verified Purchase
    So this floats freely and spins without any noticeable resistance, I'd say approches 300-500 RPM in bright daylight. Will lollygag in slight sun, but it needs quite a bit to get rotating. Its totally cool and what I expected, works as expected. Crystal clear. I see nothing wrong here. Buy one for the kids, it will open thier eyes to "thats JUST THE SUN" no moving parts, nothing complex, just very simple visually perception of...well you tell your kids what you want, but it ain't gonna stopt this from spinning. I understand it, but its still satisfying.
    Report
  • eieio
    5.0 out of 5 stars nice product but make sure they spin.
    Reviewed in the United States on October 23, 2024
    Verified Purchase
    I purchase these raidometers as gifts. Before issuing them i test them for rate of spin. I have a very good working model and that is the base sample for rate of spin from a given level of light. I recently received a unit that did not meet standard and will return it. In all, I must have bought at least 15 of these units and only two were returned. In bright sunlight they should spin like crazy. If they are making 60 RPM in brught sunllight I consider that poor quality control. I will continue to purchase these units because they are well built but maybe it is the level of vacuum or the one point bearing and excessive resistnce that is at fault. Overall I do like this unit but will not hesitate to return a poorly performing unit.

    Update: The unit that works ell spins clockwise when viewed from the top. The recent purchase units that were returned are spinning counter clockwise. The construction is good but minor flaws are acceptable. It is the rate of spin that is the issue. If they spin slowly, or not at all, I return for replacement. Slow is 60 RPM or less in direct sunlight. The unit that works well must be spinning aboout 200 RPM, maybe 300. One looks sick and the other is performing at the Olympicc level.
    Report
  • John McDonald
    5.0 out of 5 stars Met my expectations
    Reviewed in Australia on October 11, 2023
    Verified Purchase
    Product same as advertised
    Report