Cavendish balance/computerized

Product No: 02540-00

Function and Applications

For the demonstration of the mass attraction of two bodies and for the determination of the gravitational constant.

Benefits

Complete and compact system with control unit, only a recording system (e.g. aninterface-system ) or a multimeter is to be used to get 2%
Accurate results in a single lab period
Short oscillation periods of 2-4 minutes using a 25 µm diameter adjustable length tungsten wire
No more optical lever jitters due to SDC-(Symmetric Differential CapacitiveControl) sensor technology
The Cavendish balance is essentially a torsion pendulum in which two 15 g ledballs on the end of a light weight aluminium "boom" is suspended in the centre by a 25 µm diameter adjustable length tungsten wire.
The typical oscillation period is 2-4 minutes.
The boom is mounted inside an aluminium draft proofcase that allows two approx. 1 kg leadballs as acting masses to be swivelled.
Additionally, the boom is suspended between the capacitor plates of the SDC-transducer, which is mounted in the aluminium case and connects to the Symmetric Differential Capacitive ControlUnit.
The transducer output is proportional to the angular movement and has a resolution of <100 micro radians.
A bubble level affixed to the top aids in levelling the unit.
period of oscillation: approx. 4 s "