EmStat4WE
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 bipotentiostat modules, thus all techniques an EmStat3 is capable of are available for the EmStat3 4WE.
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.
Specifications
| EmStat3 4WE | Main potentiostat
|
Polypotentiostat modules
|
| – dc-potential range | ± 3.000 V | ± 3.000 V |
| – compliance voltage | ± 5 V | ± 5 V |
| – dc-potential resolution | 0.1 mV | 0.1 mV |
| – max. dc-offset error | 2 mV | 3 mV |
| – potential accuracy | 0.2 % | 0.2 % |
| – current ranges | 1 nA to 10 mA (8 ranges) | 1 nA to 10 mA (8 ranges) |
| – maximum current | ± 20 mA typical and ± 15 mA minimum for the sum of WE1, W2, W3 and W4 | |
| – current resolution | 0.1% of current range, 1 pA at lowest current range | |
| – electrometer amplifier input | > 100 GOhm // 4 pF | > 100 GOhm // 4 pF |
| – rise time | approx. 100 μs | approx. 100 μs |
The current is measured using a zero resistance ammeter (ZRA).
| Housing: | |
| – dimensions | 12 cm x 8.5 cm x 3,5 cm |
| – weight | 250 g |
| – power | 5 V external power supply (included) |
| – interfacing | USB |
| PC recommendations | Windows Vista, 7 and 8 (32 and 64 bit) Dual core processor with 2 GB RAM |