Figure 5.

Comparing voltage responses of breadboard and PCB hardware versions with KCl and Na₂SO₄ salts. The hardware circuits were tested with the same C⁴D device. The PCB hardware needed an offset correction of +2V after which the voltage response was similar to the breadboard version and showed no loss of performance as determined by Student T-tests. “Breadboard” curves are the readings from the breadboard setup; “PCB_Raw” are the readings from the PCB setup before offset correction; “PCB_Corrected” are the offset-corrected readings to match the breadboard voltage offset.