This section provides an overview for galvanostats as well as their applications and principles. Also, please take a look at the list of 8 galvanostat manufacturers and their company rankings.
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A galvanostat is a device in electrochemistry. This device applies a voltage to a sample to induce a chemical reaction or to detect a change in a physical quantity caused by a chemical reaction. A galvanostat is commonly used in combination with a potentiostat, which is also a measurement device in electrochemistry.
These two devices control a cell containing three types of electrodes: a sample electrode, a counter electrode, and a reference electrode. Potentiostats and galvanostats control different things, the former controls voltage and the latter controls current.
Galvanostats are used in chronopotentiometry and battery discharge testing.
Galvanostats requires a signal transmitter and a PC as well as the object to be measured. A frequency response analyzer (FRA) is used for the signal generator, which adds a sine curve with a constant frequency, and the sine curve output from the FRA is input to the galvanostats, creating a voltage. The voltage generated in the galvanostats causes a current to flow through the object being measured, and the response signal emitted from the sample is input to the galvanostats.
The signal input to the galvanostats are converted to a wave and input to the FRA. At this time, a sin(ω) wave is generated whose phase is shifted by ω(omega) from the input sin wave. The sin(ω) wave is fourier transformed in the FRA and only the components of the measurement frequency are extracted. Finally, the data extracted by the fourier transform is sent to a PC. By monitoring these values, it is possible to quantitatively evaluate the parameters.
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