This handy digital tachometer measures the working speed of an engine (especially in a road vehicle) in revolutions per minute (RPM) via laser. The meter ranges from 2.5 - 99,999 RPMs. Perfect for use around the house or in the garage, and great for obtaining precise measurements on engines in classroom experiments. Displays to the tenth decimal.
Learn about hydrogen fuel cells with this incredible kit!
Build a model green house and 9 other green energy-related devices with this great kit!
Experience this sphere powered by the sun!
The LCD Digital Microscope II is a professional biological microscope at an affordable price. Up to 1600X with digital zoom!
This simple but amusing magnetic toy will keep you busy for hours!
Discover a world of kaleidoscopic effects within this perfectly clear prism of the Light Crystal!
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