EmStatMUX8-R2: USB powered potentiostat with integrated multiplexer
potential range: ± 3V or ± 4V
compliance voltage: ± 5V or ± 8V
current ranges: 1 nA – 100 mA
maximum current: ± 100 mA
Product Description:
The EmStat can be combined with a multiplexer forming one integrated instrument to perform measurements with multiple electrode systems. With the MUX8-R2 connecting arrays or other setups made of up to eight working electrodes in two or three electrode cell types is possible. If more channels are required, one or more MUX-R2 can be stacked to the EmStatMUX to add up to 128 channels.
The potentiostat is controlled as well as powered by USB and is used with PSTrace.
The MUX can sample different cells at a rate of 25 ms/cell. Usually a method needs to be finished to switch the cell but the fast sampling per cell makes it possible to measure time depending techniques, e.g. chronoamperometry, practically simultaneous.
Via the script window of PSTrace it is also possible to perform a different experiment with each of the channels.
Software:
Our standard software for all single channel instruments PSTrace comes standard on a CD and available to download.
For controlling our potentiostats using a phone or tablet download PStouch for Android. It is available for free in the Google Play store.
Techniques:
The following techniques are supported by EmStatMUX.
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.
Techniques as a function of time:
ChronoAmperometry (CA)
Pulsed Amperometric Detection (PAD)
Multiple Pulse Amperometry (MPAD)
Open Circuit Potentiometry (OCP)
Multistep Amperometry (MA)
Mixed Mode (partly) (MM)
EmStat version: EmStat 3, EmStat 3+
dc-potential range:
EmStat 3: ±3.000V
EmStat 3+: ±4.000V
compliance voltage
EmStat 3: ± 5 V
EmStat 3+: ± 8 V
dc-potential resolution:
EmStat 3: 0.1 mV
EmStat 3+: 0.125 mV
applied dc-potential accuracy:
EmStat 3: ≤ 0.2 %, with max. 2 mV offset error
EmStat 3+: ≤ 0.3 %, with max. 3 mV offset error
current ranges:
EmStat 3: 1 nA to 10 mA (8 ranges)
EmStat 3+: 1 nA to 100 mA (9 ranges)
maximum current:
EmStat 3: ± 20 mA typical and ± 15 mA minimum
EmStat 3+: ± 100 mA typical
The current is measured using a zero resistance ammeter (ZRA).
Potentiostat (controlled potential mode):
current accuracy (deviation):
≤ 1 % of current range at 1 nA
≤ 0.5 % at 10 nA
≤ 0.2 % at 100 nA to 100 uA
≤ 0.5 % at 1 mA, 10 mA and 100 mA,
all with max. 0.2 % offset error
Measured current resolution: 0.1 % of current range
Electrometer:
electrometer amplifier input: > 100 Gohm // 4 pF
rise time: approx. 100 μs
Integrated MUX8-R2 Multiplexer:
number of channels: 8 (up to 128 when daisy chained)
multiplexer: switches 8 x (WE, S, RE and CE)
on resistance for WE: 1.5 ohm typical
charge injection on WE: 20 pC typical
leakage current: < 20 pA (5 pA typical) at 25 ºC
switching time : 2 ms
compliance voltage: ± 10 V
Please feel free to contact for detailed specifications, accessories, software and options.