EmStat4M Module

Tested & calibrated potentiostat module

Desktop performance in the palm of your hand
Enables rapid prototyping
Easy to reproduce measurements using MethodSCRIPT™
Many code examples for different languages and platforms

Version
Max. freq. for EIS 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
Techniques
Specifications
Software
Downloads

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Description

The EmStat4M is a potentiostat/galvanostat module supporting all common electrochemical techniques, including Electrochemical Impedance Spectroscopy (EIS). The EmStat4M can be evaluated with our PSTrace software for Windows. You can write your own applications for the EmStat4M module using our .NET libraries or MethodSCRIPT™ and control it from any platform or operating system.

Versions

The EmStat4M comes in two different versions:

Low Range (LR): current range from 1 nA to 10 mA (max. 30 mA)

High Range (HR): 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.

Onboard storage

Every EmStat4M is equipped with an internal storage of 500 MB, equivalent to 15 million data points.
This means all your measurements can automatically be saved onboard as a backup.

Start developing with the EmStat4M

The EmStat4M module can be ordered as a bare module or as part of a kit. We offer a Starter Kit and Development Kit as well. The Starter Kit includes a sensor cable, software, and more. The Development Kit comes with the EmStat4M module mounted on a development board. The development board features a Bluetooth module, Li-Ion battery charging, and options for making external connections to an Arduino for example. See the table below for an overview of what is included in both kits.

	Module only	Starter Kit	Development Kit
EmStat4M LR or HR module
Development Board	–	–
USB-C cable	–
USB-C splitter cable for extra power (EmStat4M HR only)	–
Sensor cable (1 meter with 2 mm pins)	–
4 or 5 croc clips	–
Dummy Cell	–
PSTrace software for Windows (on USB drive)	–
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 EmStat4M is available in two versions: LR (Low Range) and HR (High Range).

Main differences between the EmStat4M 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	WE, RE, CE, Sense, and ground

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)
measured current accuracy The current accuracy describes how close to the real values your measured current is.	≤ 0.2% at Full Scale Range

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% (gain) + 0.002 * CR (offset)
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

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 100 kHz
ac-amplitude range	0.9 * CR (A_rms)

Electrometer

> 1 TΩ // 10 pF

10 kHz default or

500 kHz for EIS and fast CA/CP

Other
	LR	HR
electrode connections	WE, RE, CE, and ground	WE, RE, CE, S and ground
dimensions	62 mm X 40 mm X 7 mm
weight	± 130 g
power + communication	USB-C port
internal storage space	500 MB, equivalent to > 15M datapoints

EmStat4M LR EIS Accuracy Contour Plot

EmStat4M 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.

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

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
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Software (8)

	Name	Last updated
	EmStat4 Firmware v1.3.4 See app note "EmStat Pico firmware updating" for more information about updating built-in and bare EmStat4M modules.	25-03-24
	EmStat4 Firmware v1.2.3 See app note "EmStat Pico firmware updating" for more information about updating built-in and bare EmStat4M modules.	08-02-23
	PalmSens SDK for Python PalmSens Python SDK 5.9 with support for PalmSens instruments.	07-11-22
	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.	07-07-22
	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.	17-03-22
	Getting started with PalmSens SDK for WPF This manual explains how to use the SDK with the included libraries and examples.	07-06-21
	Getting started with PalmSens SDK for WinForms This manual explains how to use the SDK with the included libraries and examples.	07-06-21
	Getting started with PalmSens SDK for Android This manual explains how to use the SDK with the included libraries and examples.	07-06-21

Documentation (10)

	Name	Last updated
	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 Brochure EmStat4M Brochure including main specifications and practical limitations.	28-02-24
	Entering the Bootloader This document explains how to enter the bootloader of the EmStat Pico or the EmStat4M and update the firmware.	05-10-23
	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
	EmStat4M Connection Card This connection card provides an overview of the connector pin-outs.	14-03-22
	MethodSCRIPT 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 V1.0 Describes how to communicate with the EmStat4M directly and how to send MethodSCRIPTS.	14-10-21
	MethodSCRIPT v1.2 MethodSCRIPT v1.2 protocol description	28-04-20

Datasheet (1)

	Name	Last updated
	EmStat4M Datasheet Document with more detailed specifications including module pin-out.	30-11-23

Application Note (1)

	Name	Last updated
	Migrating to the EmStat4M LR or HR This Application note shows the differences between our older and latest EmStat modules which are relevant when switching your software and electronics design to work with the EmStat4 LR or HR.	06-10-22

Other (1)

	Name	Last updated
	EmStat4M Altium symbol and footprint The ZIP file contains an Altium library with EmStat4M footprint and symbol	19-10-21

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