Ruggedized potentiostat with battery & Bluetooth

  • Portable: battery, Bluetooth and rugged housing
  • Available with connection module for sensor cable or SPE
  • Potential range ±3 V
  • Max. current ±30 mA
  • Optional impedance analyzer: 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.
PalmSens usually responds to your quotation request within one business day.


The EmStat4R delivers desktop performance in a rugged enclosure. The EmStat4R is a portable Battery or USB-powered Potentiostat, Galvanostat, and optional a Frequency Response Analyzer (FRA) for Electrochemical Impedance Spectroscopy (EIS). The EmStat4R is great for applications that require low currents, from 30 mA down to picoamps, such as sensor applications. The EmStat4R is controlled with PSTrace for Windows, the Android app PStouch, or you can write your own MethodSCRIPT and control it from any platform or operating system.

Two versions

The EmStat4R is available with a cell cable or SPE connection module. Both versions can be configured with optional EIS/FRA with a maximum frequency of 200 kHz. See specifications for more information.

EmStat4R SNS

EmStat4R SPE

Connection module Cell cable Connection module Screen-printed-electrode
Cell cable included Yes Cell cable included No
Electrode connections WE, RE, CE and ground Electrode connections RE, WE, CE
Connectors 2 mm banana Sensor pitch 2.54 mm
    Maximum sensor width 11 mm
    Allowed sensor thickness Between 0.1 mm and 0.8 mm


Always a backup

Always a backup

The EmStat4R 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 EmStat4R includes a rugged carrying case with:

  • EmStat4R
  • Rugged case
  • USB-C cable
  • Cell cable: high quality, double-shielded cable with 2 mm banana connectors for Working, Counter, Reference electrode and Ground
  • 4 crocodile clips
  • Dummy Cell
  • PSTrace software for Windows (on USB drive)
  • Manual (hardcopy)
  • Quick Start document
  • Calibration report
  • Three year warranty


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)


  • 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 PSTrace 5.10.
Custom techniques
MethodSCRIPTTM allows for developing custom techniques. Scroll to software for more information.
Missing a technique? See cross-reference list


dc-potential range ±3 V
compliance voltage ±5 V
maximum current ±30 mA
max. data acquisition rate 1M samples /s
applied potential resolution 100 µV
applied potential accuracy ≤ 0.2% ±1 mV offset
current ranges 1 nA to 10 mA
8 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

bandwidth settings

320 Hz, 3.2 kHz, 30 kHz or 570 kHz

current ranges

10 nA, 1 uA, 100 uA, 10 mA

4 ranges

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

<0.4% of current

±20 pA  ±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)

measured dc-potential accuracy ≤ 0.2% ±1 mV offset
bandwidth settings 320 Hz, 3.2 kHz, 30 kHz or 570 kHz
frequency range 10 µHz to 200 kHz
ac-amplitude range

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

frequency range 10 µHz to 200 kHz
ac-amplitude range

0.9 * CR (Arms)

electrometer amplifier input > 1 TΩ // 10 pF

10 kHz default or

500 kHz for EIS and fast CA/CP

electrode connections

Two versions:

  • Sensor cable: WE, RE, CE and ground ending in 2 mm banana plugs
  • SPE connector: RE, WE and CE

aluminum body only:
11.1 x 6.0 x 2.7 cm3
with rubber sleeve:
11.8 x 6.8 x 3.3 cm3


± 310 g

power + communication

USB-C port or Bluetooth

Battery life
  • >6 hours with cell on at 10 mA current
  • charging up to 80% takes approx. 3.5 hours
  • a full charge takes approx. 5 hours
internal storage space

500 MB, equivalent to > 15M datapoints

EmStat4R EIS Accuracy Contour Plot
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 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
  • Browse measurements on instrument’s internal storage
More information about PSTrace
PSTrace Method Editor


PStouch works with all our single channel and multiplexed instruments. PStouch functions include:

  • Setting up and running measurements
  • Analysing and manipulating peaks
  • Sharing data directly via e-mail, Dropbox, or any other file sharing service
  • All files compatible with PSTrace


Get it on Google Play

More information about PStouch

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.

Learn about MethodSCRIPT

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


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
How to use Drop Detection with the SPE Connection Module Describes the functionality and working principle of Drop Detection with the SPE Connection Module for EmStat Go and EmStat4R. Application Note 03-10-22
EmStat4R Brochure The EmStat4R brochure contains an overview of all the supported techniques, specifications, kit contents, the software PSTrace, the Android app PSTouch and MethodSCRIPT Documentation 13-09-22
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
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