The Series G 300's small size does not compromise its performance. Its output is a healthy ±300 mA at ±20 V. The Series G 300 is an excellent compromise between a reasonably high current for measuring high corrosion rates and an impressively low current for measuring impedance of organic coatings. Its 9 current ranges and post gain offset capability allow for an impressive maximum resolution of 1.0 fA (gain=100). 16-bit D/A and A/D converters, along with four terminal current and voltage measurements, provide accurate results down to 1 µV resolution. On-board electronics allow EIS scans from 10 µHz to 300 kHz without the need for an external FRA or lock-in amplifier. Extensive voltage and current channel filtering allows quiet measurements in very noisy environments. A state machine insures accurate data acquisition timing, even when you run other applications on your computer.