A bridge network for the precise measurement of direct capacitance

For measurements by substitution only, the balance of a transformer bridge network can be made independent of capacitance and conductance from either terminal of the specimen to earth. In the network proposed in the paper both oscillator and detector have one terminal connected to earth. The network is particularly useful for measuring capacitances of less than 100¿¿F in the presence of stray capacitances to earth. It can be used at frequencies between about 4c/s and 20Mc/s; at frequencies up to about 1Mc/s it is suitable for work of the highest precision.