Remote Source Meter Provides Sub-Femtoamp Sensitivity

Combining the voltage and current sourcing and measurement functions of the firm's SourceMeter product family, along with the sensitivity and high input resistance associated with electrometers, the Model 6430 sub-femtoamp remote SourceMeter can reportedly detect current changes as small as 4 x 10^-16 amperes. It can make measurements at speeds as high as 2000 readings/s. And on the nanoamp ranges, currents can be measured in as little at 5 ns. The meter can measure femtoamp-level currents at resolutions down to hundreds of attoamps and can measure low-level voltages with microvolt resolution. A small, remote preamplifier makes it possible to locate the preamp at the source of current, minimizing cable noise that can reduce measurement sensitivity.Other key features of the instrument include: 0.4A_pk-pk noise; resistance measurements using Source V/Measure I or Source I/Measure V; fast measurements of up to 2000 readings/s that can be stored in the unit's memory buffer; high-speed pass/fail testing in less than 1.1 ms per device; resolution up to 6 1/2 digits; and more.