QT designed instrumentation -capacitance meter-

Capacitance (and conductance) meter
Battery operated box using low signal levels (sinewave 40mVpeak approx 5kHz) that measures both capacitance and conductance (1/R). Both the output and input can be connected to a sample via several meters of coax without influencing the measured values. Only the capacitance from the inner pin of the output BNC to the inner pin of the input BNC is measured, using a phase-sensetive lockin technique suppressing interference and discriminating between the resistive(sine) and capacitive(cosine) current from the sample. Both results are shown on the two displays on the front of the box.