--- product_id: 59382307 title: "DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill Spinning Vanes" brand: "dorami" price: "$67.36" currency: USD in_stock: true reviews_count: 13 category: "Dorami" url: https://www.desertcart.us/products/59382307-dorami-clear-solar-power-crookes-radiometer-sun-light-energy-glass store_origin: US region: United States of America --- # Handmade crystal-clear design Vacuum-sealed glass bulb 300-500 RPM max spin speed DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill Spinning Vanes **Brand:** dorami **Price:** $67.36 **Availability:** ✅ In Stock ## Summary > ☀️ Spin into the future of light-powered elegance! ## Quick Answers - **What is this?** DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill Spinning Vanes by dorami - **How much does it cost?** $67.36 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/59382307-dorami-clear-solar-power-crookes-radiometer-sun-light-energy-glass) ## Best For - dorami enthusiasts ## Why This Product - Trusted dorami brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Elegant Handmade Glass:** Exquisitely crafted crystal-clear glass blends science with sophisticated décor. - • **Sun-Powered Kinetic Art:** Harness natural & artificial light to mesmerize your space with dynamic motion. - • **Gift of Everlasting Motion:** A unique, thoughtful present that spins continuously with light, symbolizing enduring connections. - • **Interactive Physics Insight:** A captivating tool to visualize light, heat, and vacuum principles—perfect for curious minds. - • **Precision Vacuum Engineering:** Ultra-low friction vacuum bulb ensures smooth, high-speed rotation up to 500 RPM. ## Overview The DORAMI Clear Solar Power Crookes Radiometer is a precision vacuum glass bulb device with four vanes that spin up to 500 RPM when exposed to sunlight or artificial light. Handmade from crystal-clear glass, it serves as both a captivating desktop decoration and an educational physics tool, illustrating principles of light, heat, and vacuum dynamics. Ideal for professionals seeking a blend of science, art, and sustainable energy inspiration in their workspace or as a unique gift. ## Description desertcart.com: DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill Spinning Vanes : Toys & Games Review: First one I ever tried. Gets whippin' in broad daylight. - 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. Review: nice product but make sure they spin. - 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. ## Features - How it works - The glass Radiometer is made of a vacuum glass bulb. There is a rotating shaft and four blades inside. When it is exposed to sunlight, artificial light, or infrared radiation, its leaves will rotate. The stronger the light, the faster it rotates. - Exquisitely designed - Handmade from high-quality glass. Crystal clear, small and exquisite. It needs to be placed on a flat surface to prevent shattering. - The best decoration - It is suitable for occasions such as offices, living rooms, bedrooms, classrooms, study rooms, parties, etc. Place it on a desktop or windowsill, and as long as there is sufficient light, it can rotate continuously without requiring any other energy. - Creative Gift - Giving it as a gift to our family, friends, colleagues, and leaders is perfect. As long as there is light, it can rotate continuously, just like our emotions. As long as we treat them sincerely, friendship can be eternal. - Physics teaching tools - their formation can explain many physics principles. For example, the principle of refraction of light, the principle of air friction, the principle of vacuum propagation of light, the principle of uneven heating generating power, and so on. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B075CRFG38 | | Age Range Description | Adult | | Best Sellers Rank | #69,378 in Toys & Games ( See Top 100 in Toys & Games ) #27 in Solar Power Kits | | Brand Name | DORAMI | | Customer Reviews | 4.1 out of 5 stars 805 Reviews | | Educational Objective | Imagination Development | | Is Assembly Required | No | | Item Dimensions | 6.3 x 4.09 x 4.02 inches | | Manufacturer | DORAMI | | Manufacturer Minimum Age (MONTHS) | 180.00 | | Manufacturer Part Number | unknown | | Material Type | Glass | | Size | 4.09 inches (W) x 6.3 inches (L) x 4.02 inches (H) | | Theme | Love | | UPC | 602463521995 | ## Images ![DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Glass Windmill Spinning Vanes - Image 1](https://m.media-amazon.com/images/I/61v1xT9nE3L.jpg) ## Questions & Answers **Q: What are the vanes made of? Both the black and silver.** A: There are not two different kinds of vanes. Each vane is made of a lightweight metal with one side polished and the other painted black. **Q: I plan on using this to explain thermal energy in my classroom. Does it work well?** A: Absolutely! It functions perfectly and is well made. I had one growing up and it always intrigued me. I got one for each of my kids when they got homes. Love it! **Q: whats the height ? and other dimensions if you have** A: Hello, thank you for your question. The height of this product is 5.5 inches and the width is 3 inches. Thanks again! **Q: Does it need direct sun light to work?** A: No, but near. And the light needs to be directional. I.E. if there's a lot of light but it's bouncing off the walls or coming in other windows, those reflected waves will cancel out some. In my dining room I can sit it on the table near a large window with sun but in the shade and it will turn slowly. And I can make it turn slowly with my LED flashlight. ## Customer Reviews ### ⭐⭐⭐⭐⭐ First one I ever tried. Gets whippin' in broad daylight. *by N***E on June 18, 2025* 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. ### ⭐⭐⭐⭐⭐ nice product but make sure they spin. *by E***O on October 23, 2024* 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. ### ⭐⭐⭐⭐⭐ One of Three Non-Functioning *by V***J on May 20, 2026* Sweet little radiometer but purchase an extra. One of my three I ordered did not work upon arrival. ## Frequently Bought Together - DORAMI Clear Solar Power Crookes Radiometer Sun Light Energy Spinning Vanes - Sunnytech Low Temperature Stirling Engine Motor Steam Heat Education Model Toy Kit For mechanical skills (LT001) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/59382307-dorami-clear-solar-power-crookes-radiometer-sun-light-energy-glass](https://www.desertcart.us/products/59382307-dorami-clear-solar-power-crookes-radiometer-sun-light-energy-glass) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-28*