Brand: CH Instruments | Category: Nanotechnology
CHI201 is the picoamp booster on its own, the current measuring half of the CHI200(B) Picoamp Booster and Faraday Cage. CH Instruments state that current down to a few picoamperes can be read with it, that its sensitivity matches the 1x10^-12 A/V of the 600B/C/D/E series internal range but at a lower bias current, and that placing the preamplifier close to the electrode lowers noise. Detection and switching are automatic: the booster enables itself at sensitivity scales of 1e-8 A/V and below, stands down for automatic sensitivity switching techniques such as Tafel plots and bulk electrolysis and for galvanostatic techniques, and works with AC impedance. On a bipotentiostat it affects the primary channel only.
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The faraday cage is catalogued separately as CHI202 and forms the screening half of the CHI200(B) Picoamp Booster and Faraday Cage. CH Instruments state that it removes electrical interference, line frequency noise in particular, and that it also makes relatively fast measurements of small currents possible. Where an electrochemical cell is picking up noise from its surroundings, CH Instruments recommend adding the cage.
CHI173-xxx is how CH Instruments catalogue a printed paper user manual, with xxx standing for the instrument model number it covers. It is ordered as a separate accessory line item against a given instrument.
CHI220 is the simple cell stand in the CH Instruments range, made of stainless steel and Teflon and shown in two published figures. Four glass cells are included with it. CH Instruments note that the stand is not remote-controllable.