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    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4
    MultiEmStat4

    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
    Clear
    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.
    You'll usually get an answer to your quotation request within one business day.
    Add to quotation

    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)
    In Linear Sweep Voltammetry a potential scan is performed from the begin potential, to the end potential. The voltage during the scan increases with small potential steps. Continue reading
    Cyclic Voltammetry (CV)
    Cyclic voltammetry is a known method of demonstrating the presence of a substance in a given liquid by drawing a graph with a characteristic wavy line. Continue reading
    Fast Cyclic Voltammetry (FCV)
    Fast Cyclic Voltammetry is cyclic voltammetry with a very high scan rate up to 1 V per microsecond. Continue reading
    AC Voltammetry (ACV)
    In AC Voltammetry a potential scan is made with a superimposed sine wave which has a relatively small amplitude of 5 ~ 10 mV and a frequency of 10 to 250 Hz. Continue reading

    Pulsed techniques

    Differential Pulse Voltammetry (DPV)
    In Differential Pulse Voltammetry a potential scan is made using pulses with a constant amplitude of E pulse superimposed on the dc-potential. Continue reading
    Square Wave Voltammetry (SWV)
    Square Wave Voltammetry is a special version of Differential Pulse Voltammetry is, where the pulse time is equal to half the interval time. Continue reading
    Normal Pulse Voltammetry (NPV)
    In Normal Pulse Voltammetry (NPV) a potential scan is made by making constantly larger potential steps of pulse. Continue reading

    Amperometric techniques

    Chronoamperometry (CA)
    The instrument applies a constant dc-potential and the current is measured with constant interval times. Continue reading
    Zero Resistance Amperometry
    A ZRA measures the current flowing through it without adding any resistance. This means the current is measured without the ZRA influencing the current. Continue reading
    Chronocoulometry (CC)
    Chronocoulometry is an electrochemical technique during which a potential is set. Continue reading
    MultiStep Amperometry (MA)
    MultiStep Amperometry (MA) is an electrochemical technique which simply allows the user to specify the number of potential steps they want to apply and how long each step should last. Continue reading
    Fast Amperometry (FAM)
    Fast Amperometry (FAM) is a form of amperometric detection with very high sampling rates or respectively very short interval times. Continue reading
    Pulsed Amperometric Detection (PAD)
    With Pulsed Amperometric Detection a series of pulses (pulse profile) is periodically repeated. Pulsed Amperometric Detection can be used when higher sensitivity is required. Continue reading
    Multiple-Pulse Amperometric Detection (MPAD)
    Multiple-Pulse Amperometric Detection (MPAD) is an electrochemical technique that can be used when higher sensitivity is required. Using pulses instead of constant potential might result in higher faradaic currents Continue reading
    *

    Galvanostatic techniques

    Linear Sweep Potentiometry (LSP)
    With Linear Sweep Potentiometry, a current scan is performed from the begin current to the end current. Continue reading
    Chronopotentiometry (CP)
    Chronopotentiometry (CP)is an electrochemical technique in which a controlled current, usually a constant current, is caused to flow between two electrodes; the potential of one electrode is monitored as a function of time with respect to a suitable reference electrode. Continue reading
    MultiStep Potentiometry (MSP)
    MultiStep Potentiometry allows the user to specify the number of current steps they want to apply and how long each step should last. The potential response is continuously sampled with the specified interval. Continue reading
    Open Circuit Potentiometry (OCP)
    Open Circuit Potential (OCP) is the potential where no current is flowing, because the circuit is open. Continue reading
    Stripping Chronopotentiometry (SCP / PSA)
    Stripping Chronopotentiometry (SCP or PSA) starts with a deposition stage at the deposition potential. After this stage, the potential versus time is recorded. In this stage, the potentiostat is switched off and the measurement starts. Continue reading
    *

    Electrochemical Impedance spectroscopy (EIS)

    Electrochemical Impedance spectroscopy (EIS)
    Electrochemical Impedance Spectroscopy (EIS) is an electrochemical technique to measure the impedance of a system in dependence of the AC potentials frequency. Continue reading
    PEIS - Potential scan (IMPE)
    EIS - Fixed potential
    GEIS - Fixed current
    EIS - Time scan (IMPT)
    Fast EIS/GEIS *

    Other

    Mixed Mode (MM)
    Mixed Mode is a flexible technique that allows for switching between potentiostatic, galvanostatic, and open circuit measurements during a single run. Continue reading
    Custom techniques (MethodSCRIPT)
    Techniques marked with an * will become available with a software update at a later moment.
    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
    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
    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
    The maximum potential difference, that can be applied between WE and RE.
    		±3 V ±6 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
    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
    The applied potential accuracy describes how close to the real values your applied potential is.
    		≤ 0.2% ±1 mV offset
    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    		 100 nA to 100 mA
    7 ranges
    measured current resolution
    The lowest observable difference between two values that a measurement device can differentiate between.
    		0.009% of CR (92 fA on 1 nA range) 0.009% of CR (9.2 pA on 100 nA range)
    measured
    current accuracy
    The current accuracy describes how close to the real values your measured current is.

    < 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
    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.

    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
    The current accuracy describes how close to the real values your measured current is.

    < 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
    The current accuracy describes how close to the real values your measured current is.
    		≤ 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
    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.
    		> 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 cm
    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 MultiEmStat4 comes with MultiTrace for Windows. MultiTrace allows the instrument to be controlled in two different modes: Individual and Simultaneous channel control mode.

    Individual mode

    The individual mode gives an overview of all channels. Each channel can be selected separately and can run a measurement independently in parallel with other channels. You can also run a script for a sequence of measurements and other actions on each channel. 

    Simultaneous mode

    In the Simultaneous Mode the MultiEmStat4 works with all channels running the same measurement in parallel at the same time. There is only one active method in the Method Editor which is started on all selected channels simultaneously upon start. All results are presented as overlays in the same plot.

    More information about MultiTrace

    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
    More information about our SDK

    MethodSCRIPT™ communications protocol

    The MultiEmStat4-series work with MethodSCRIPT™, giving you full control over your potentiostat channels. The simple script language is parsed on-board, which means no DLLs or other type of code libraries are required. MethodSCRIPT™ allows for running all supported electrochemical techniques, making it easy to combine different measurements and other tasks. 

    MethodSCRIPT can be generated, edited, and executed in PSTrace.

    MethodSCRIPT features includes:

    • (Nested) loops and conditional logic support
    • User code during a measurement iteration
    • Exact timing control
    • Simple math operations on variables (add, sub, mul, div)
    • Data smoothing and peak detection
    • Digital I/O, for example for waiting for an external trigger
    • Logging results to internal storage or external SD card
    • Reading auxiliary values like pH or temperature
    • and many more…
    More information about MethodSCRIPT

    Downloads
    Expand all Collapse all

    Documentation (5)

    Name Last updated
    MultiEmStat4 Brochure MultiEmStat4 Brochure, a Multi-Channel Potentiostat, Galvanostat and Impedance Analyzer. 08-01-25
    MethodSCRIPT v1.5 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. 25-03-24
    EmStat4M Communication Protocol V1.3 Describes how to communicate with the EmStat4M directly and how to send MethodSCRIPTS. 25-03-24
    EmStat4M Communication Protocol V1.2 Describes how to communicate with the EmStat4M directly and how to send MethodSCRIPTS. 01-02-23
    MethodSCRIPT v1.4 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. 01-02-23

    Software (2)

    Name Last updated
    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.     		07-07-24
    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

    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
    Expand all Collapse all

    MultiEmStat4 Brochure

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