TEL RP2010 Computerized Cavendish Balance to measure G
* Gives ±2% accuracy in a single lab period.
* Uses a 25 micron diameter, adjustable length, tungsten wire.
* Short oscillation periods of 2-4 minutes.
* Revolutionary SDC sensor technology.
The Cavendish Unit is essentially a torsion pendulum in which 2 » 15g lead balls on the end of a light weight aluminum "boom" are suspended in the center by a 25 micron diameter adjustable length tungsten wire. The typical period is 2-4 minutes. The boom is mounted inside an aluminum draft proof case that allows
2 » 1Kg lead balls (the attracting masses) to be swiveled. The boom is suspended between the capacitor plates of the SDC transducer which is mounted in the aluminum case and connects to the Symmetric Differential Capacitive Control Unit. This unique transducer design measures only the rotational motion and minimizes the unwanted pendulous component of motion. The transducer output is proportional to the angular movement of the boom and has a resolution of < 100 microradians. A small mirror is mounted on the boom for those who want to use an optical lever arrangement. A bubble level affixed to the top aids in leveling the unit.A Symmetric Differential Capacitive Control Unit and computer interface, such as KIS (TEL-123), is also needed.
TEL RP2010 $1,181.00
TEL RP2011 w/SDC Control Unit $1,549.00
