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The 3B Scientific U14300 Crookes radiometer is 210mm high with a 80mm bulb diameter and demonstrates the conversion of radiation energy to kinetic energy. The rotary vane wheel sits on a metal tip for low friction and the evacuated glass housing provides clear visibility. The Crookes radiometer weighs 0.24 lb. and is suitable for use in physical science classroom instruction.
Science education products incorporate applied math and science principles into classroom and homeschool-based projects. Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities. Science education projects include a broad range of activities, such as practical experiments in engineering, aeronautics, robotics, energy, chemistry, physics, biology, and geology.
3B Scientific manufactures anatomical models, simulators, charts, and other training materials for use in scientific, medical, and patient education. The company, founded in 1948 and headquartered in Hamburg, Germany, meets International Organization of Standardization (ISO) standard 9001: 2008.
Rosa L. Moreno
Reviewed in the United States on March 24, 2024
Beautiful my husband loved it
Customer
Reviewed in the United States on May 4, 2022
This is a quality control issue. Black paint is already coming off out if the box. The main issue is that the vanes are bent and not evenly distributed. So much so that it will not spin freely. Company could have easily fixed this before sealing in glass but chose not to.
Retired in Texas
Reviewed in the United States on December 14, 2017
Looks nice but does not work due to the blades being out of balance.
Billy Brackenridge
Reviewed in the United States on August 28, 2016
Terrible quality control. The vanes are not evenly spaced, and when it does work it wobbles. I have another radiometer, and it works, but this one won't spin unless there is very bright sunlight.The good news is that this is a beautiful product. It just doesn't work. I wanted to put on my table next to wine glasses. The bad news is the sunlight would need to be so bright that it would be uncomfortable to drink wine.I have a radiometer that works, but it isn't beautiful. If you want a beautiful radiometer and don't care whether it works, this is the product for you.If you get one that was built correctly, this would be a 5 star product.
Human
Reviewed in the United States on February 12, 2016
Excellent! At first I thought it wasn't working — had it in a window and it wasn't spinning at all (on a cloudy day). However, this little thing needs a lot of light to get going. On a sunny day or placed near a lamp, it spins on and on like a perpetual motion machine.
Travis
Reviewed in the United States on August 31, 2015
The media could not be loaded.
chris
Reviewed in the United States on August 24, 2015
wasted over 50 dollars in something that does not work. the fins are all twisted and warped. why should i waste my time returning this item back to you. just send me a replacementThis one goes straight in the bin.Here are some photos.Please do the right thing.still waiting for reply.
CSM
Reviewed in the United States on December 8, 2015
Although I found a little bit of debris inside the glass bulb (perhaps tiny bits of the paint used to coat the fins), I simply thumped the glass lightly until it dislodged and fell down the stem to where I couldn't see it anymore. When exposed to sunlight, it spins like a dream and it doesn't take much sunlight to do so. It will take a considerably larger amount of indoor lighting to accomplish the same thing, I think. Here's a video I took of mine when exposed to sunlight: https://www.youtube.com/watch?v=PENyhnScKao
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