Product review for Radiometer Please read our review guidelines and see the terms of use of posting a review. Overall Rating: and share your thoughts with other customers Sort Reviews: Newest | Oldest | Highest Rating | Lowest Rating  NEXT :: Viewing page 1 of 2  -  Sunday, November 16, 2008 250 Watt Arc Light @ < 1 Ft. was Required to Spin Vanes Reviewed By: Jeff (Kirkland, Washington) My daughter and I experimented for a week before we found something that would make the vanes spin. We tried direct sunlight, flash lights, incandescent and flourescent lamp bulbs (60W), bicycle lights, candles, and a hair dryer (a suggested experiment in the manual) with no success. Nothing seemed to make the vanes turn even the slightest. Today we finally got it to work when using a 250 Watt arc light from the hardware store meant for illuminating a work area. We placed it 1 1/2 feet from the radiometer and the vanes spun at approximately 240 RPM. It is suggested ages 8 years and up which is appropriate if considering the radiometer is made of glass. However, it wouldn't be appropriate for an 8 year old to handle a 250 Watt light source that can potentially burn them or set fire. I'm quite pleased I was able to share a learning experience with my daugther and the radiometer did what it claimed however I am disappointed with the safety and difficulty in getting it to perform. I don't feel I can let my daugther experiment unattended with the radiometer. My suspicion is the vacuum inside the radiometer is inadequate.  -  Saturday, November 22, 2008 37 years and still spinning Reviewed By: NS (Honolulu, Hawaii) I bought a radiometer from Edmund Scientific 37 years ago and it's still spinning by a window at my parents' house (near Seattle). I'm going to buy another one for where I live now.  -  Friday, August 24, 2007 fun and amazing Reviewed By: Greg (Barrington, RI) Great fun for kids of all ages. Simply put in sunlight and it turns like a remote control advice. Great product!  -  Thursday, March 05, 2009 Better than the rest Reviewed By: James (Sky Valley, CA) This replaces a piece of junk I bought from another scientific company.  -  Wednesday, May 30, 2007 just awesome Reviewed By: G (Stillwater, OK) This product is a real eye grabber, and get everybody's attention when they come into my office. Far they know about its mechanics :) It just looks cool!

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