CHI200(B) Picoamp Booster and Faraday Cage

By CH Instruments

With the CHI200(B) Picoamp Booster and Faraday Cage, current down to a few picoamperes can be readily measured. The CHI200 is compatible with the Model 600/A, 700/A series of instruments, while the CHI200B is compatible with Model 600B/C/D/E, 700B/C/D/E and 800B/C/D series. When used with a 700/A/B/C/D/E and 800B/C/D series bipotentiostat, the Picoamp Booster will affect the primary channel only. The internal sensitivity of the 600B/C/D/E series is the same as the Picoamp Booster (1x10-12 A/V). However, the bias current of the 600B/C/D/E series input can be as high as 50 pA. The Picoamp Booster has a lower bias current, and it also brings the preamplifier close to the electrode, resulting in lower noise. The Faraday Cage also makes it possible to make relatively fast measurements of small currents. When the Picoamp Booster is connected and the sensitivity scale is at or below 1e-8 A/V, the Picoamp Booster will be automatically enabled. Otherwise it will be disabled. Detection of the Picoamp Booster and its enabling/disabling are fully automatic and do not require user intervention. The Picoamp Booster will be disabled for techniques using automatic sensitivity switching, such as Tafel plots (TAFEL) and bulk electrolysis (BE), and galvanostatic techniques. For galvanostatic techniques, such as chronopotentiometry (CP), chronopotentiometry with Current Ramp (CPCR), Multi-Current Steps (ISTEP), and Potentiometric stripping analysis (PSA), the Picoamp Booster will not work. However, it works with AC impedance (IMP). In addition to allowing weak signal measurements, the Faraday cage is useful for eliminating electrical interference, especially line frequency noise. If the electrochemical cell is picking up electrical noise from the environment, the additional use of the Faraday cage is strongly recommended. Dimensions: 9.6"(W) x 8.8"(D) x 11.8"(H) Weight: 10 lb.