Nexus

Engineered for Electrochemical Excellence

(Bi)Potentiostat/ Galvanostat/ Impedance analyzer
FRA / EIS: 10 μHz up to 1 MHz
11 current ranges: 100 pA to 1 A
Dual EIS with second sense electrode
Script your experiments using MethodSCRIPT
Use with PSTrace software for Windows

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.
Add Bipotentiostat Get an additional Working Electrode and make a BiPotentiostat of your instrument. continue reading	Clear

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Description
Accessories
Techniques
Specifications
Software
Downloads

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Description

Building on PalmSens’ legacy of providing top-tier solutions for accurate low-current measurements, Nexus delivers an ultra-low-noise performance that exceeds even our existing portable devices, while also supporting measurements up to 1 Ampere.

The research software PSTrace makes using the Nexus a breeze. The scripting language MethodSCRIPT gives a user full control when needed. Looking for a multi-channel instrument? Just stack multiple instruments on top of each other. iR-compensation is included by default.

Why choose the Nexus?

Typical research fields

Always a backup

Every Nexus is equipped with an internal storage of 32 GB. This means all your measurements can automatically be saved on-board as backup.
Measurements can be browsed and transferred to the PC easily using the PSTrace software for Windows.

Accessories

Accessories for the Nexus

Techniques

Voltammetric techniques

Pulsed techniques

Amperometric techniques

Galvanostatic techniques

Electrochemical Impedance spectroscopy (EIS)

PEIS - Potential scan (IMPE)

EIS - Fixed potential

GEIS - Fixed current

EIS - Time scan (IMPT)

Fast EIS/GEIS *

Other

Techniques marked with an * will become available with a software update at a later moment.

Missing a technique? See cross-reference list

Specifications

General
dc-potential range The maximum potential difference, that can be applied between WE and RE.	±10 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	±12 V
maximum current	±1.1 A

Potentiostat (controlled potential mode)
applied dc-potential resolution The lowest observable difference between two values that a measurement device can differentiate between.	78 µV
applied potential accuracy The applied potential accuracy describes how close to the real values your applied potential is.	≤0.1% ±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.	100 pA to 1 A (11 ranges)
current accuracy The current accuracy describes how close to the real values your measured current is.	< 0.1% of measured current ±10 pA ±0.1% of range
measured current resolution The lowest observable difference between two values that a measurement device can differentiate between.	0.0038 % of current range (3.8 fA on 100 pA range)

Galvanostat (controlled current mode)
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 1 A (10 ranges)
applied dc-current	±5 * range (< 10 mA) ±4.5 * range (10-100 mA) ±1 * range (1 A)
applied dc-current resolution	0.0038% of applied current range
applied dc- current accuracy The current accuracy describes how close to the real values your measured current is.	< 0.1% of current ±10 pA (bias) ±0.1% of range (offset)
potential ranges	10 mV, 100 mV, 1 V
measured dc-potential resolution	78 µV at ±10 V (1 V range) 7.8 µV at ±1 V (100 mV range) 0.78 µV at ±0.1 V (10 mV range) 78 nV at ±0.01 V (1 mV range)
measured dc-potential accuracy	≤ 0.05% or ±1 mV (for \|E\| < ±9 V) ≤ 0.2% (for \|E\| ≥ ±9 V)

Optional: FRA / EIS (impedance measurements)
frequency range	10 μHz to 1 MHz
ac-amplitude range	1 mV to 0.3 V rms, or 0.8 V p-p

Optional: GEIS (galvanostatic impedance measurements)
frequency range	10 μHz to 1 MHz
ac-amplitude range	0.001 * range to 0.15 * range RMS (full range) 0.001 * range to 0.74 * range RMS for frequencies up to 1 kHz

Optional: GEIS (galvanostatic impedance measurements)

frequency range

10 μHz to 1 MHz

ac-amplitude range

0.001 * range to 0.15 * range RMS (full range)

0.001 * range to 0.74 * range RMS for frequencies up to 1 kHz

Electrometer
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	1 MHz

Optional: Bipotentiostat
dc-potential range The maximum potential difference, that can be applied between WE and RE.	± 5 V
dc-potential resolution	153 µV (16-bit)
dc-offset error	≤ 0.1%, ± 1 mV offset
accuracy	≤ 0.1 %
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.	100 pA to 10 mA (9 ranges)
maximum measured current	i(WE1) + i(WE2) < 45 mA
current resolution	0.0038% of current range
current accuracy The current accuracy describes how close to the real values your measured current is.	≤ 0.1% of current 0.1% of range (offset)

iR Compensation module
method used for iR-drop compensation	Positive Feedback
resolution of MDAC used for correcting potential	16-bit
max. compensated resistance	1 MΩ
max. bandwidth for iR-drop compensation enabled	10 kHz

Other
electrode connection	2 mm banana pins for RE, WE, WE2, CE, GND, Sense and Sense 2
housing	aluminium body: 20 x 21 x 4.5 cm
weight	1.8 kg
communication	ethernet and USB-C
internal storage space	32 GB or > 800 million datapoints

Auxiliary port (D-Sub 15)
analog input	±10 V, 18-bit An 18 bit input can measure in 2^18 or roughly 262 thousand different steps. If you measure for example an analog voltage that can go from 0 to 5V, the accuracy is 5 divided by 262k, resulting in resolution of 20 uV. Continue reading
analog output	0-10 V, 12 bit (1 kΩ output impedance)
4 digital outputs	0-5 V
1 digital input	0-5 V
i-out and E-out	raw output of current and potential E-out ±10 V (1 kΩ output impedance) i-out ±2 V (1 kΩ output impedance)
power	5 V output (max. 150 mA)

PSTrace

PSTrace is designed to be productive immediately after installation, without going through a long learning period. It has three modes; the Scientific mode which allows you to run all the techniques our instruments have to offer, and two dedicated modes for Corrosion analysis and the Analytical Mode. PSTrace is suitable for all levels of user experience.

Features include:

Direct validation of method parameters
Automated peak search
Equivalent Circuit Fitting
Scripting for running an automated sequence of measurements
Open data in Origin and Excel with one click of a button
Load data from the instrument’s internal storage
and many more…

More information about PSTrace

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 SDKs

MethodSCRIPT™ Communications Protocol

The Nexus works with MethodSCRIPT™, giving you full control over your potentiostat. 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…

MethodSCRIPT

Downloads

Name	Type	Last updated
Nexus Brochure The Nexus uses the latest advancements in technology, and offers very accurate electrochemical results with ultra-low-noise. Read more about the Nexus in the brochure.	Documentation	22-04-25
MethodSCRIPT v1.7 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	26-03-25
Nexus Operator’s Manual Learn how to connect the instrument, understand the specifications, use the features and troubleshoot if needed.	Documentation	20-02-25