Metrohm Autolab PGSTAT 302N with ECD and FRA module

This high end, high current potentiostat/galvanostat, with a compliance voltage of 30 V and a bandwidth of 1 MHz, combined with the FRA32M module, is specially designed for electrochemical impedance spectroscopy.

The maximum current is 2 A, the current range can be extended to 20 A with the BOOSTER20A, the current resolution is 30 fA at a current range of 10 nA.

Key features
Electrode connections 2, 3 and 4
Compliance voltage +/- 30 V
Potential range +/- 10 V
Maximum current +/- 2 A (20 A with BOOSTER20A)
Current ranges 1 A to 10 nA (100 pA with ECD module)
Potential accuracy +/- 0.2 %
Potential resolution 0.3 µV
Current accuracy +/- 0.2 %
Current resolution 0.0003 % (of current range)
Input impedance > 1 TOhm
Potentiostat bandwidth 1 MHz
Computer interface USB
Control software NOVA

FRA module

Electrochemical impedance spectroscopy (EIS) is a powerful technique for the characterization of electrochemical systems. It has widespread application in the field of characterization of materials. It is routinely used in the characterization of coatings, batteries, fuel cells, and corrosion phenomena. It has also been used extensively as a tool for investigating mechanisms in electrodeposition, electrodissolution, passivity and corrosion studies, diffusion of ions across membranes, study of semi-conductor interfaces and biosensors. 

The Autolab users can perform EIS measurements with the FRA32M module. Installation of this module in the main unit allows one to perform both potentiostatic and galvanostatic impedance measurements over a wide frequency range of 10 µHz to 32 MHz (limited to 1 MHz in combination with the Autolab PGSTAT). In addition to the classical EIS, the NOVA software also allows the users to modulate other outside signals such as rotation speed of a rotating disk electrode or the frequency of a light source to perform Electro-hydrodynamic or Photo-modulated impedance spectroscopy.

The FRA32M module comes with a fit and simulation software for the analysis of impedance data.

Key features:

  • Frequency range 10 µHz - 32 MHz (10 µHz - 1 MHz in combination with the Autolab PGSTAT)
  • Frequency resolution 0.003 %
  • Input range 10 V
  • Signal types 1 sine, 5 sine, 15 sine
  • Input channels E and I from the potentiostat/galvanostat or X and Y external signals
  • AC amplitude 0.2 mV to 0.35 V rms in potentiostatic mode
  • 0.0002 - 0.35 times current range in galvanostatic mode
  • Data presentation Nyquist, Bode, Admittance, Dielectric, Mott-Schottky and more
  • Data analysis Fit and Simulation, Find circle
  • Graphical Equivalent Circuit in NOVA

ECD Module

The lowest current range available on the standard Autolab is 10 nA. At this current range, the Autolab has a current resolution of 30 fA. When doing measurements on micro-electrodes sometimes even higher resolution is needed. Originally designed for electrochemical detection in HPLC and FIA, the ECD module makes the measurement of such low currents possible. 

The ECD module provides 2 additional current ranges of 1 nA and 100 pA giving a minimum current resolution of 0.3 fA. The ECD module also has a built in third order Sallen-Key filter, with 3 RC-time constants that help to filter out noise.

Application areas:

Electrochemical measurements on micro-electrodes
Detection of heavy metals in aqueous solutions in ultra low concentrations