50 Hz-20 kHz Ultra-precision Capacitance Bridge AH 2700A Andeen hagerling

Measures extremely low loss down to a dissipation factor of 1.5x10-8 tan d, a conductance of 3x10-7 nanosiemens or a resistance up to 1.7x106 gigohms
As little as 0.4 second required for full precision measurements and as little as 30 ms required for repeated measurements on the same sample
Fast analog output has a frequency response of 3 kHz at 3 dB down
Negative capacitance and loss ranges measure negative values to allow for unusual samples or three terminal networks
Commutation (test signal reversal) to minimize external power line or other periodic signal pickup
Three terminal BNC connections minimize connector costs and number of cables
IEEE-488 GPIB and IEEE-1174 serial interfaces included; remote device can act as controller or logger
Programmability can eliminate the need for an external controller
Large, variable-brightness displays having 8 digits for capacitance and loss and 5 digits for frequency
Deviation measurements of capacitance, loss or both
Zero correction of test fixture capacitance and loss
External DC bias up to ±100 volts
External trigger capability
NIST or NPL traceable calibration
Autoranging
Automatic internal calibration
Self-test diagnostics on power-up and by command
Three year warranty