Potentiostats / Galvanostats - Distributed by EKTechnologies
Here you will find measuring devices, instruments, accessories and completely automated systems around potentiostats / galvanostats.
In the field of electrochemistry, potentiostats / galvanostats are the main measurement tool for carrying out electrochemical experiments. We offer single and multi-channel potentiostats / galvanostats with different voltage and current ranges:
- Voltage ranges from ±2 V up to ±15 V
- Current ranges from ±3 nA up to 10 A
- Frequency ranges from 10 mHz up to 1 MHz for impedance measurements
Let us know what requirements need to be met in terms of technical specifications, size, or even user-oriented technical adaptations for the physical chemistry, and we will help you find the right measuring device tailored to your individual needs. Come to us with your questions.
Note: The electrochemical products are distributed by EKTechnologies, while processing takes place via the store of our parent company LXinstruments.
PalmSens
PS-C-SENSIT-BT.xx-Serie
Price on request
BASi Research Products, Inc
BS-EF-1031F
Price on request
PalmSens
PS-ES4S-XX.FX-Serie
Price on request
OrigaLys
OL-OGF-Serie
Price on request
PalmSens
PS-C-MES4-Serie
Price on request
PalmSens
PS-C-SENSIT-SM
Price on request
PalmSens
PS-PS4-Serie
Price on request
OrigaLys
OL-OGS-Serie
Price on request
What is a potentiostat / Galvanostat used for?
A potentiostat is an electronic device that supplies voltage to a system under investigation (e.g. a battery) in order to trigger reactions and measures the resulting current. A galvanostat, on the other hand, supplies the system with current and measures the voltage. This results in current and voltage curves. The system is characterized by interpreting these curves. Among other things, conclusions can be drawn about the reaction kinetics, resistances or battery performance.
How does a potentiostat work?
An electrochemical cell usually consists of a housing, an electrolyte and usually three electrodes: Working electrode (WE) counter electrode (CE) and reference electrode (RE), which are immersed in the electrolyte. The task of the potentiostat is to measure and control the potential (or voltage) of the working electrode in relation to the reference electrode. This is implemented with the aid of an operational amplifier (OPA).
As a differential amplifier, the OPA balances the two input signals from the working and reference electrodes and releases a corresponding current flow to the counter electrode for equalization. As long as the potential difference between the working and reference electrodes does not correspond to the desired value, the OPA regulates the current flow through the cell between the counter and working electrodes.
Areas of application and measuring methods
Typical areas of application for potentiostats/galvanostats are:
- Sensor development
- Electrochemistry
- Corrosion research
- Battery research
- Analytical chemistry...
A potentiostat/galvanostat can function in two different ways.
In the potentiostatic mode, the voltage is applied and regulated. The current flowing through the electrochemical cell is measured. The most common measurement method used in this mode is cyclic voltammetry (also known as the delta voltage method). Here, the voltage is varied at a constant potential feed rate. The result is a cyclic voltammogram. This provides information on electron transitions and electrode kinetics, for example.
In the galvanostatic mode, the current is applied and regulated and the voltage is measured. This mode is mainly used in the field of battery development. The battery performance is examined in the charge/discharge experiment (cyclization). The battery is charged and discharged with a constant current between specified voltage values.
Impedance spectroscopy: In this method, the system under investigation is exposed to a sinusoidal alternating voltage with a small amplitude in a specific frequency range. This is used to characterize electrode kinetics or corrosion processes, for example.
Most of our potentiostats/galvanostats are already equipped with an impedance analyzer for carrying out impedance measurements. Alternatively, it is possible to purchase an extension module for the electrochemical impedance spectroscopy (EIS).