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CENCO Digital Free-Fall Timer |
A pushbutton launcher, a special piezo landing pad, and modern electronics combine to provide extremely accurate data, allowing your students to conveniently perform the classic free-fall experiment with fall distances from 50cm to over 1.2m.Features include easy to assemble components; a simple, reliable pushbutton launcher; large accurate LED display; landing pad that catches ball; and data storage of up to five entries.Timing is electronically resolved to within 0.001 seconds, the landing sensor responds in microseconds, and the flexible trigger releases instantly with reduced launcher vibration. The timer can display one free-fall time or store up to five for later review. Specially designed to withstand the rigors of typical lab use, our free-fall timer has no moving parts or protruding buttons which can break, and both the launcher and the landing pad are connected to the timing box with easily detachable standard 1/4″ phono jacks. The launcher mounts on any standard 13mm support rod. Nine-volt power supply and complete operating instructions included. Size: landing pad diameter is 7.5cm, control unit 19 x 10 x 5.5cm.
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 - Tuesday, October 11, 2011 Poor design Reviewed By: Jim (Mt Holly, NJ) Instead of the simple landing pad switch design used for years, Cenco switched to these piezo-electric pieces of junk. They are annoyingly loud on landing, and after a year or two the piezo-electric element gets crushed by the landing plate . Please bring back the old style landing plates!!!  - Friday, March 25, 2011 good product Reviewed By: Stephen (OKC, OK) For the most part this is a good product. I currently use this in a Physcs lab, and we have had only a couple of problems. the Timers can be a little slow... I had to devise a "time adjustment" that students subtract from thier average time. Also the threaded screw (used to attach the launcher to the lab stand) is not very rugged. after about 7 times setting this up for a lab, the attachment screw started showing signs of failing. other than these two issues, students can usually find g to within about 7% error.
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