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    EmStat4S

    USB powered potentiostat / galvanostat with EIS

    • Two versions: Low Range and High Range
    • Potential range ±3 V or ±6 V
    • Max. current ±30 mA or ±200 mA
    • FRA / EIS: 10 μHz up to 200 kHz
    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.
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    Description

    The EmStat4S delivers desktop performance in the palm of your hand. The EmStat4S is a portable USB-powered Potentiostat, Galvanostat, and optional a Frequency Response Analyser (FRA) for Electrochemical Impedance Spectroscopy (EIS). The EmStat4S is controlled with PSTrace for Windows, or you can write your own MethodSCRIPT and control it from any platform or operating system.

    Versions

    The EmStat4S comes in two different versions:

    • Low Range: current range from 1 nA to 10 mA (max. 30 mA)
    • High Range: current ranges from 100 nA to 100 mA (max. 200 mA)

    Both versions can be configured with optional EIS/FRA with a maximum frequency of 200 kHz.
    See specifications for more information.

    Always a backup

    Always a backup

    The EmStat4S is equipped with 500 MB internal storage memory for storing your measurements as a backup. All internally stored measurements can be browsed and transferred back to the PC easily using the PSTrace software for Windows. Your data is always with your instrument wherever you take it.

    Standard included

    A standard EmStat4S includes a rugged carrying case with:

    • EmStat4S
    • USB-C cable
    • Sensor cable: high quality, double-shielded cable with 2 mm banana connectors for Working, Counter, Reference electrode and Ground
    • 4 or 5 crocodile clips
    • Dummy Cell
    • PSTrace software for Windows (on USB drive)
    • Manual (hardcopy)
    • Quick Start document
    • Calibration report

    Techniques

    Voltammetric techniques

    • Linear Sweep Voltammetry (LSV)
    • Cyclic Voltammetry (CV)
    • Fast cyclic Voltammery (FCV)*
    • AC Voltammetry (ACV)*

    Amperometric techniques

    • Chronoamperometry (CA)
    • Zero Resistance Amperometry (ZRA)
    • Chronocoulometry (CC)
    • MultiStep Amperometry (MA)
    • Fast Amperometry (FAM)*
    • Pulsed Amperometric Detection (PAD)
    • Multiple-Pulse Amperometric Detection (MPAD)*

    Galvanostatic techniques

    • Linear Sweep Potentiometry (LSP)
    • Chronopotentiometry (CP)
    • MultiStep Potentiometry (MP)
    • Open Circuit Potentiometry (OCP)
    • Stripping Chronopotentiometry (SCP or PSA)*

    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.
    Software update
    Techniques marked with an asterisk* will become available with the next software update.
    Missing a technique? See cross-reference list

    Specifications

    The EmStat4S is available in two versions: the LR (Low Range) and HR (High Range) version.

    Main differences between the EmStat4S 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
    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% potential ±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:
    7.2 x 5.5 x 2.6 cm3
    weight

    ± 130 g
    power + communication

    USB-C port
    internal storage space

    500 MB, equivalent to > 15M datapoints
    EmStat4S LR EIS Accuracy Contour Plot
    EmStat4S 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

    PSTrace

    PSTrace for Windows provides support for all techniques and device functionalities. With a smooth simple interface, showing only the applicable controls, PSTrace is suitable for all levels of user experience. Functions include:

    • Direct validation of method parameters
    • Equivalent Circuit Fitting
    • Automated peak search
    • Scripting for running an automated sequence of measurements
    • Open data in Origin and Excel with one click of a button
    • Load data from EmStat4 internal storage
    More information about PSTrace
    PSTrace Method Editor

    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

    MethodSCRIPT™ communications protocol

    The EmStat4 potentiostat module has an on-board parser for the MethodSCRIPT™ scripting language. This language allows developers to program a human-readable script for the EmStat4 module on any platform or operating system. The simple script language allows for running electrochemical techniques supported by EmStat4 and makes it easy to combine different measurements and other tasks.

    MethodSCRIPT

    Downloads

    Name Type Last updated
    EmStat4M Communication Protocol V1.2 Describes how to communicate with the EmStat4M directly and how to send MethodSCRIPTS. Documentation 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. Documentation 01-02-23
    EmStat4S Brochure The EmStat4S brochure contains an overview of all the supported techniques, specifications, software, EIS accuracy contour plots, kit contents, and more. Documentation 09-09-22
    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. Software 17-03-22

    EmStat4S Brochure

    The EmStat4S brochure contains an overview of all the supported techniques, specifications, software, EIS accuracy contour plots, kit contents, and more.
    Download
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