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MultiEmStat4

Multi-channel Potentiostat / Galvanostat / Impedance Analyzer

  • Available with 4, 8 or 12 channels
  • FRA / EIS: 10 μHz up to 200 kHz
  • Potential range: ±3 V (LR) or ±6 V (HR)
  • Max. current: ±30 mA (LR) or ±200 mA (HR)
Electrochemical Impedance Spectroscopy (EIS) is an electrochemical technique to measure the impedance of a system in dependence of the AC potentials frequency. With this option you can select the maximum AC frequency for EIS.
Galvanic Isolation of each channel is needed, if you want to use your potentiostat with other potentiostats in the same cell or want to use it for Zero Resistance Amperometry, continue reading
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Galvanic isolation
Without galvanic isolation it is not possible to operate multiple 2- or 3-electrode systems in the same cell. Another reason to use a floating instrument is to avoid ground loops. Furthermore if you want to use your EmStat or PalmSens as a Zero Resistance Ammeter (ZRA), it needs to be floating. With a ZRA you are measuring a current without changing it. There is, however, a disadvantage of galvanic isolation: The noise protection is drastically reduced. Usually all conducting shields connected to the ground act as a Faraday cage for the device and protect it against noise. If the connection between the chassis and the potentiostat is removed, the chassis no longer acts as a Faraday cage for the potentiostat. We recommend galvanic isolation only for customers, who know that they need it and are aware of the drawback.
PalmSens usually responds to your quotation request within one business day.
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Description

No Compromises on Productivity and Performance

The MultiEmStat4 is a compact Potentiostat, Galvanostat, and optional Frequency Response Analyser (FRA) for Electrochemical Impedance Spectroscopy (EIS) with 4, 8 or 12 channels. The MultiEmStat4 comes in two versions; the Low Range version is great for applications that require a low current range down to 1 nA, whereas the High Range version is very suitable for applications that need a maximum current of 200 mA.

The MultiEmStat4 is controlled with MultiTrace for Windows, or you can write your own MethodSCRIPT and control it from any platform or operating system.

Always a backup

Always a backup

The MultiEmStat4 is equipped with 500 MB internal storage memory on each channel for storing your measurements as a backup. All internally stored measurements can be browsed and transferred back to the PC easily using the MultiTrace software. Your data is always with your instrument wherever you take it.

Synchronizing channels in Synched mode

By enabling synchronization of channels and adjusting the setup of your cables, you can use the MultiEmStat4 as a polypotentiostat. This means you can use multiple working electrodes, one counter and one reference electrode in the same cell at the same time. Your working electrodes all perform the same measurement.

Techniques

Voltammetric techniques

  • Linear Sweep Voltammetry (LSV)
  • Cyclic Voltammetry (CV)

Amperometric techniques

  • Chronoamperometry (CA)
  • Zero Resistance Amperometry (ZRA)
  • Chronocoulometry (CC)
  • MultiStep Amperometry (MA)
  • Pulsed Amperometric Detection (PAD)

Galvanostatic techniques

  • Linear Sweep Potentiometry (LSP)
  • Chronopotentiometry (CP)
  • MultiStep Potentiometry (MP)
  • Open Circuit Potentiometry (OCP)

Pulsed techniques

  • Differential Pulse Voltammetry (DPV)
  • Square Wave Voltammetry (SWV)
  • Normal Pulse Voltammetry (NPV)

Other

  • Mixed Mode (MM)
  • Potentiostatic/Galvanostatic Impedance spectroscopy (EIS / GEIS)
    • Potential scan or current scan
    • Fixed potential or fixed current
    • Time scan
Stripping modes
The voltametric and pulsed techniques can all be used in their stripping modes which are applied for (ultra-) trace analysis.
Missing a technique? See cross-reference list

Specifications

The MultiEmStat4M is available in two versions: the LR (Low Range) and HR (High Range) version.

Main differences between the MultiEmStat4 Low and High Range
 
 

Potential range ±3 V ±6 V
Max. compliance voltage ±5 V ±8 V
Current ranges 1 nA to 10 mA (8 ranges) 100 nA to 100 mA (7 ranges)
Max. current ±30 mA ±200 mA
Electrode connections WE, RE, CE and ground,
2 mm banana plugs		 WE, RE, CE, Sense, and ground,
2 mm banana plugs
Hardware options
  • EIS up to 200 kHz
  • Galvanic Isolation
  • EIS up to 200 kHz
  • Galvanic Isolation
General
  LR HR
dc-potential range ±3 V ±6 V
compliance voltage ±5 V ±8 V
maximum current ±30 mA ±200 mA
max. data acquisition rate 1 000 000 samples /s
Potentiostat
  LR HR
applied potential resolution 100 µV 183 µV
applied potential accuracy ≤ 0.2% ±1 mV offset
current ranges 1 nA to 10 mA
8 ranges		 100 nA to 100 mA
7 ranges
measured current resolution 0.009% of CR (92 fA on 1 nA range)
measured current accuracy

< 0.2% of current

±20 pA  ±0.2% of range

< 0.2% of current

±0.2% of range
bandwidth settings 320 Hz, 3.2 kHz, 30 kHz or 570 kHz
Galvanostat
  LR HR
current ranges

10 nA, 1 uA, 100 uA, 10 mA

4 ranges

1 uA, 100 uA, 10 mA, 100 mA

4 ranges
applied dc-current ±3 * CR (current range)
applied dc-current resolution 0.01% of CR 0.0183% of CR
applied dc-current accuracy

< 0.4% of current

±20 pA  ±0.2% of range

< 0.4% of current

±0.2% of range
potential ranges

50 mV, 100 mV, 200 mV, 500 mV, 1 V
measured dc-potential resolution

96 µV at ±3 V (1 V range)
48 µV at ±1.5 V (500 mV)
19.2 µV at ±0.6 V (200 mV)
9.6 µV at ±0.3 V (100 mV)
4.8 µV at ±0.150 V (50 mV)

193 µV at ±6 V (1 V range)
96.5 µV at ±3 V (500 mV)
38.5 µV at ±1.2 V (200 mV)
19.3 µV at ±0.6 V (100 mV)
9.65 µV at ±0.3 V (50 mV)
measured dc-potential accuracy ≤ 0.2% ±1 mV offset
bandwidth settings 320 Hz, 3.2 kHz, 30 kHz or 570 kHz
FRA / EIS
  LR HR
frequency range 10 µHz to 200 kHz
ac-amplitude range

1 mV to 900 mV rms, or 2.5 V p-p
measured current accuracy ≤ 0.2% at Full Scale Range
GEIS
  LR HR
frequency range 10 µHz to 200 kHz
ac-amplitude range

0.9 * CR (Arms)
Electrometer
  LR HR
electrometer amplifier input > 1 TΩ // 10 pF
bandwidth

10 kHz default or

500 kHz for EIS and fast CA/CP
Other
  LR HR
electrode connections

WE, RE, CE,
and ground,
with 2 mm banana plugs

WE, RE, CE, S
and ground,
with 2 mm banana plugs
housing

aluminum body:
21.2 x 22.1 x 7.7 cm3
weight

± 3 kg
power + communication

USB (type B) port
internal storage space per channel

500 MB, equivalent to > 15M datapoints
MultiEmStat4 LR EIS Accuracy Contour Plot
MultiEmStat4 HR EIS Accuracy Contour Plot
Note
The accuracy contour plots were determined with an ac-amplitude of ≤10 mV rms for all limits, except for the high impedance limit, which was determined using an ac-amplitude of 250 mV. The standard cables were used. Please note that the true limits of an impedance measurement are influenced by all components in the system, e.g. connections, the environment, and the cell.

Software

MultiTrace for Windows

The MultiTrace software gives you full control over the channels of our multi-channel instruments. MultiTrace can be used with multi-channel potentiostats in two different modes; the Individual and Simultaneous mode.

Individual mode

All potentiostats are used independently. Measurements can be started on all channels with one click, or one at a time on individual channels. Each measured curve is shown in its own plot.

Simultaneous mode

All channels run the same measurement at the same time (optionally hardware-synchronized). The measured curves are displayed in a single plot and can be stored together in a single data file or in separate data files.

 

More information about MultiTrace

Software Development Kits

The PalmSens Software Development Kits (SDKs) for .NET can be used with any of our instruments or OEM potentiostat modules to develop your own software. The SDK’s come with a set of examples that shows how to use the libraries.

PalmSens SDKs with examples are available for the following .NET Frameworks:

  • WinForms
  • WPF
  • Xamarin (for Android)
More information about SDKs for .NET

Downloads

Documentation (3)

Name Last updated
MultiEmStat4 Brochure MultiEmStat4 Brochure, a Multi-Channel Potentiostat, Galvanostat and Impedance Analyzer. 09-09-22
MethodSCRIPT communication protocol v1.3 The MethodSCRIPT scripting language is designed to improve the flexibility of the PalmSens potentiostat and galvanostat devices for OEM users. It allows users to start measurements with arguments that are similar to the arguments in PSTrace. PalmSens provides libraries and examples for handling low level communication and generating scripts for MethodSCRIPT devices such as the EmStat Pico and EmStat4. 19-01-22
EmStat4M Communication Protocol Describes how to communicate with the EmStat4M directly and how to send MethodSCRIPTS. 14-10-21

Software (2)

Name Last updated
MultiTrace – PC Software for all Multi-channel instruments The MultiTrace software controls the individual channels of our multi-channel instruments. You can also combine multiple single-channel instruments. 17-03-22
MethodSCRIPT code examples MethodSCRIPT code examples include:
- MethodSCRIPTExample_C
- MethodSCRIPTExample_C_Linux
- MethodSCRIPTExample_C#
- MethodSCRIPTExample_Arduino
- MethodSCRIPTExample_Python
- MethodSCRIPTExample_iOS
- MethodSCRIPTExample_Android
Every code example comes with a "Getting Started" document. 		08-04-20

Application Note (1)

Name Last updated
Multi-Channel: Multiple Working Electrodes in the Same Cell Learn how to use a multi-channel potentiostat as a polypotentiostat, so you can use multiple working electrodes in the same cell sharing one reference and counter electrode. 19-01-22

MultiEmStat4 Brochure

MultiEmStat4 Brochure, a Multi-Channel Potentiostat, Galvanostat and Impedance Analyzer.
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