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PalmSens BV
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EmStat - Model 4WE -Multi-Channel Potentiostat

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A polypotentiostat with 4 working electrodes, that makes parallel measuring of multiple electrodes in one electrochemical cell possible. With this polypotentiostat one electrochemical cell can be equipped with 1, 2, 3 or 4 working electrodes and all of these will be measured parallel. The EmStat3 4WE consists of a standard EmStat3 potentiostat and additionally three polypotentiostat (bipotentiostat-like) modules. All techniques supported by EmStat3 are available for the EmStat3 4WE.

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Available modes

The additional WE’s can each individually be used in two different modes:

  1. The potential of the additional WE has a constant dc-potential offset with respect to WE1, i.e. it is following the potential change of WE1.
  2. The potential of the additional WE has an independent fixed dc-potential.
Each potentiostat has eight current ranges: 1 nA to 10 mA with a resolution of 1 pA at the lowest current range and can automatically select the optimal current range.
A cell can be setup with one reference and one counter electrode or one combined reference and counter electrode.

The following techniques are supported by EmStat3 4WE.

Voltammetric techniques:

  • Linear sweep voltammetry (LSV)
  • Differential pulse voltammetry (DPV)
  • Square wave voltammetry (SWV)
  • Normal pulse voltammetry (NPV)
  • Cyclic voltammetry (CV)

These methods can all be used in their stripping modes which are applied for (ultra-) trace analysis.

Technique as a function of time:

  • Chronoamperometry (CA)
  • Pulsed amperometric detection (PAD)
  • Multiple pulse amperometry (MPAD)
  • Multistep amperometry (MA)