EmStat4S

USB powered potentiostat / galvanostat with EIS

  • Two versions: Low Range and High Range
  • Potential range ยฑ3 V or ยฑ6 V
  • Max. current ยฑ30 mA or ยฑ200 mA
  • FRA / EIS: 10 ฮผHz 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
ย 
ย 
Potential range ยฑ3 V ยฑ6 V
Max. compliance voltage ยฑ5 V ยฑ8 V
Current ranges 1 nA to 10 mA (8 ranges) 100 nA to 100 mA (7 ranges)
Max. current ยฑ30 mA ยฑ200 mA
Electrode connections WE, RE, CE and ground,
2 mm banana plugs
WE, RE, CE, Sense, and ground,
2 mm banana plugs
General
ย  LR HR
dc-potential range ยฑ3 V ยฑ6 V
compliance voltage ยฑ5 V ยฑ8 V
maximum current ยฑ30 mA ยฑ200 mA
max. data acquisition rate 1 000 000 samples /s
Potentiostat
ย  LR HR
applied potential resolution 100 ยตV 183 ยตV
applied potential accuracy โ‰ค 0.2% ยฑ1 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 โ‰ค 0.2% at Full Scale Range
Galvanostat
ย  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 ยฑ3 * CR (current range)
applied dc-current resolution 0.01% of CR 0.0183% of CR
applied dc-current accuracy <0.4% (gain) + 0.002 * CR (offset)
measured dc-potential resolution

96 ยตV (gain 1)

48 ยตV (gain 2)

19.2 ยตV (gain 5)

9.6 ยตV (gain 10)

4.8 ยตV (gain 20)

193 ยตV (gain 1)

96.5 ยตV (gain 2)

38.5 ยตV (gain 5)

19.3 ยตV (gain 10)

9.65 ยตV (gain 20)

measured dc-potential accuracy โ‰ค 0.2% ยฑ1 mV offset
FRA / EIS
ย  LR HR
frequency range 10 ยตHz to 200 kHz
ac-amplitude range

1 mV to 900 mV rms, or 2.5 V p-p

measured current accuracy โ‰ค 0.2% at Full Scale Range
GEIS
ย  LR HR
frequency range 10 ยตHz to 200 kHz
ac-amplitude range

0.9 * CR (Arms)

Electrometer
ย  LR HR
electrometer amplifier input > 1 Tโ„ฆ // 10 pF
bandwidth

10 kHz default or

500 kHz for EIS and fast CA/CP

Other
ย  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

ยฑ 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 โ‰ค10 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 SDKโ€™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

MethodSCRIPTโ„ข communications protocol

The EmStat4 potentiostat module has an on-board parser for the MethodSCRIPTโ„ขย 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
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
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. Documentation 19-01-22
EmStat4M Communication Protocol Describes how to communicate with the EmStat4M directly and how to send MethodSCRIPTS. Documentation 14-10-21
EmStat4S description The description document of the EmStat4S instrument contains an overview of all techniques, specifications, the software PSTrace, Countour plots, kit contents, and scripting. Documentation 19-05-21
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