1 kHz Automatic Capacitance Bridge AH 2500A Andeen hagerling

The AH 2500A offers unparalleled stability, resolution and accuracy in a capacitance/loss1 bridge (whether manual or automatic). Its numerous state of the art features make it an exceptionally user friendly instrument. The precision and ease of use of the 2500A are creating new applications in science, engineering and production in a range of industries.

Outstanding Features


Accuracy of 5 ppm (or 3 ppm with Option E)
Stability better than 1 ppm/year (or 0.5 ppm/year with Option E)
Resolution of 0.5 attofarad (.000 0005 pF) and 0.15 ppm (or 0.5 aF and 0.07 ppm with Option E)
Temperature Coefficient of 0.03 ppm/°C (0.01 ppm/°C with Option E)
Measures extremely low loss down to a dissipation factor of 1.5x10-8 tan delta, a conductance of 3x10-7 nanosiemens or a resistance up to 1.7x106 gigohms
Full precision measurements in less than 0.5 second and repeated measurements on the same sample in less than 40 milliseconds
Both capacitance and loss ranges cover negative values to allow for unusual samples or three terminal networks
Three terminal BNC connections minimize connector costs and number of cables
Commutation (test signal reversal) to minimize external power line or other periodic signal pickup
Autoranging
IEEE-488 and RS-232 interfaces included; external device can serve as controller or logger
Programmable features can eliminate the need for an external controller
Full or abbreviated English language commands and error messages
Large, variable brightness, eight digit display of capacitance and loss
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
Automatic internal calibration
NIST traceable calibration
Self test diagnostics on power-up
Three year warranty
Please note: The non-option-E version of the AH2500A has been replaced by the AH2550A bridge. Please refer to the AH2550A page on this site.