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Customers most agreed on the following attributes:
from Austin, Tx on 2/12/2008
This gadget is a great way to demonstate the Gas Laws equation. It's like looking into the inside of a diesel engine.
from Malvern, PA on 2/12/2008
This is a great demo to show Charles law and to help students see that the kinetic energy of gas molecules is fixed even if volume changes. The device works well once you learn how to push the plunger just the right way. So it is something that a teacher might practice then use. It is harder for a student to use without practice.
from Oakland, CA on 10/27/2007
over the years I have purchased about 50 fire syringes at ~ $29 each and the students broke all but 10 of them. They had a glass testtube that would always break. finally this product will burn a bigger piece of cotton and does not break
from Durham NC on 9/17/2007
We might just convince the machine shop teacher to build us a metal version. It would be fun to have a 2-stroke diesel in class. By the way, it works with dryer lint or coffee creamer too.
from Bradenton, Florida on 5/4/2007
Much more durable than other brands that I have purchased over the years. Very reliable...normally ignites within two compressions. Impressive flash is very visable to students. Ignition tube cleans very easily.
from Chicago Area on 3/11/2007
This product comes with everything you need, including the cotton and replacement O-rings. Tip: use just a whisp of cotton - it still makes a nice, visible flash. I used it in a classroom of 26 students and everyone could see the flame. Be sure to clean it out before the next use by simply wrapping some Kleenex around a pencil and swabbing out the entire tube. If some of the O-ring lubricant gets on the cotton, you may not get a flame, so avoid the walls when putting in a fresh piece of cotton.
from Pasadena, CA on 1/17/2007
Students *love* seeing fire, and the demo is really effective at getting kids excited and interested.
However, this is recommended with reservations for one main reason. On a moist day (rainy outside) I had trouble getting the cotton to ignite, presumably because of moisture content in the cylinder kept the compression from heating the air.
Great, affordable model of a classic physics demonstration. This fire syringe will be a personal and classroom hit. Nothing brings enthusiasm to science like explosions and fire - explosion is minimal but the suprise of fire and is there! This is money well spent.
This is much sturdier and more stable than others I have used, and appears to be truly non-breakable.
Easy to use. Try to use on a dry day so water vapor doesn't interfere with the flash.
from Ann Arbor, Michigan on 8/14/2006
Great Demo. My students were impressed.