EmStatMUX8-R2
USB powered potentiostat with integrated multiplexer
- potentiostat with integrated 8 channel multiplexer
- potential range: ± 3V or ± 4V
- compliance voltage: ± 5V or ± 8V
- current ranges: 1 nA – 100 mA
- maximum current: ± 100 mA
You'll usually get an answer to your quotation request within one business day.
Description
With the EmStat3MUX8-R2 you can connect arrays or other setups made of up to eight working electrodes in two or three electrode cell types. If more channels are required, one or more MUX-R2 can be stacked to the EmStatMUX8-R2 for a total of up to 128 channels.
The potentiostat is controlled as well as powered by USB and is used with PSTrace. The MUX8-R2 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 simultaneously. Via the script window of PSTrace it is also possible to perform a different experiment on each of the channels sequentially.
To make it easier for you to decide, if a multiplexer or a multichannel device is more suitable for your application, we have created a short explanation of multiplexers, multichannels and polypotentiostats.
Specifications
| With EmStat potentiostat version | ||
|---|---|---|
| 3 | 3+ | |
dc-potential range
The maximum potential difference, that can be applied between WE and RE.
|
± 3.000 V | ± 4.000 V |
compliance voltage
The compliance voltage is the maximum voltage that can be applied between the working and counter electrode. Another name could be the maximum cell potential. Continue reading
|
± 5 V | ± 8 V |
| dc-potential resolution | 0.1 mV | 0.125 mV |
| dc-potential accuracy | 0.2 % | 0.3 % |
current ranges
A potentiostat measures current. For optimal precision, the range between which currents are measured is split into multiple current ranges. A current range defines the maximum current a potentiostat can measure in a certain range. This means it will also determine the resolution, because the number of bits or rather states is fixed, while the current range is variable.
|
1 nA to 10 mA (8 ranges) | 1 nA to 100 mA (9 ranges) |
| maximum current | ± 20 mA typical and ± 15 mA minimum |
± 100 mA typical |
The current is measured using a zero resistance ammeter (ZRA).
| Potentiostat (controlled potential mode) | |
|---|---|
current accuracy
The current accuracy describes how close to the real values your measured current is.
|
≤ 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
The lowest observable difference between two values that a measurement device can differentiate between.
|
0.1 % of current range |
| Electrometer | |
|---|---|
electrometer amplifier input
The amplifier input resistance of the amplifier in the electrometer determines the load that the amplifier places on the source of the signal being fed into it. Ideally the resistance is infinite, and the load to be zero to not to influence your measurement.
|
> 100 GΩ // 4 pF |
| rise time | approx. 100 us |
| 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
The compliance voltage is the maximum voltage that can be applied between the working and counter electrode. Another name could be the maximum cell potential. Continue reading
|
± 10 V |
| Other | |
|---|---|
| housing | aluminium: 138 mm x 121 mm x 37 mm |
| weight | +/- 500 g |
| temperature range | 0 ºC to + 50 ºC |
| power supply | USB |
| communication | USB-C |
| The EmStatMUX8-R2 has the following connections | |
|---|---|
| Connector | Function |
| Input | Y-cable connects to both potentiostat sensor connector and (digital) AUX |
| AUX | Can be used to measure auxiliary input like temperature or pH, and to switch external hardware using two digital control lines that can be set in PSTrace |
| Link | Connects to Input of next multiplexer, for daisy-chaining multiple multiplexers. |
| USB-C | For connecting to PC or Android device |
| Channel 1-4 | Connects to sensor cables 1-4 |
| Channel 5-8 | Connects to sensor cables 5-8 |
Cell connections
There are four ways to connect your sensor. These sensor connections are quoted separately.
- Option A: Double shielded sensor cables with 2 mm banana connectors. The 2 mm banana connectors are compatible with standard croc clips (they will be included in the quotation as optional).
- Option B: High-density cable that terminates in ferrules
- Option C: Connection (Screw) Terminal to assemble your own wires.
- Option D: Screen Printed Electrode Connector
Each of these connection options can be used to connect 4 channels. When you add the EmStatMUX8 in the quotation basket we will make sure to include two units of the selected connection option so you can connect all 8 channels to the electrochemical cells. 
Software
PSTrace
PSTrace is designed to be productive immediately after installation, without going through a long learning period. It has three modes; the Scientific mode which allows you to run all the techniques our instruments have to offer, and two dedicated modes for Corrosion analysis and the Analytical Mode. PSTrace is suitable for all levels of user experience.
Features include:
- Direct validation of method parameters
- Automated peak search
- Equivalent Circuit Fitting
- Scripting for running an automated sequence of measurements
- Open data in Origin and Excel with one click of a button
- Load data from the instrument’s internal storage
- and many more…
PStouch
PStouch is an app for Android devices compatible with all PalmSens, EmStat and Sensit potentiostats. The app connects to your potentiostat via USB (depending on the Android device) or via Bluetooth.
PStouch features include:
- Setting up and running measurements
- All files compatible with PSTrace
- Analysing and manipulating peaks
- Sharing data directly via e-mail, Dropbox, or any other file sharing service
Software Development Kits
PalmSens provides several Software Development Kits (SDKs) to help developers create custom software to control their potentiostat. Each SDK comes with documentation and examples that shows how to use the libraries.
SDKs are available for:
- .NET (WinForms, WPF and Xamarin for Android)
- Python
- LabVIEW
- Matlab
Downloads
Application Note (3)
| Name | Last updated | |
|---|---|---|
| Multichannel, polypotentiostat or multiplexer This will help you to choose the ideal multi-channel instrument for your application. | 22-01-25 | |
| MUX8-R2 Connector Card This connector card gives you an overview of the MUX8-R2 connector pin-outs. | 14-03-22 | |
| OCP with MUX8-R2 The multiplexer MUX8-R2 offers the possibility to record reliable Open Circuit Potential (OCP) measurements in the Alternating mode, which allows to monitor the OCP of multiple samples / working electrodes over time with a single potentiostat. This is a significant improvement compared to its predecessors MUX8 and MUX16. In this application note it is demonstrated how to setup and perform an OCP measurement with the MUX8-R2 in the Alternating mode. | 04-05-21 |
Software (1)
| Name | Last updated | |
|---|---|---|
| PSTrace PC software for all single channel instruments PSTrace software is shipped as standard with all single channel and multiplexed instruments. The software provides support for all techniques and device functionalities. | 08-07-24 |
Documentation (2)
| Name | Last updated | |
|---|---|---|
| MUX8-R2 2xSPE breakout drawing Use this drawing if you would like to make an 8-electrode sensor that fits directly into the MUX8-R2 slots of a MUX8-R2 SPE connector. | 17-04-24 | |
| EmStatMUX8-R2 Brochure Brochure of the EmStatMUX8-R2 instrument | 16-11-20 |