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The EmStat Pico is a joint development by PalmSens BV and Analog Devices Inc. PalmSens is known for introducing the first commercially available handheld potentiostat. Over the last decade these have evolved to become smaller and more versatile. Together with Analog Devices, PalmSens now proudly presents the world smallest potentiostat module available on the market.


The EmStat Pico module supports the following techniques:

Voltammetric techniques

  • Linear Sweep Voltammetry (LSV)
  • Cyclic Voltammetry (CV)
  • Square Wave Voltammetry (SWV)
  • Differential Pulse Voltammetry (DPV)
  • Normal Pulse Voltammetry (NPV)

The above techniques can also be used for stripping voltammetry

Techniques as a function of time

  • Chronoamperometry (CA)
  • Open Circuit Potentiometry (OCP)
  • Electrochemical Impedance Spectroscopy (EIS)

MethodSCRIPT™ communications protocol

The EmStat Pico potentiostat module works with the new MethodSCRIPT scripting language. This language allows developers to program a human-readable script directly into the Pico module by means of a serial (TTL) connection. The simple script language allows for running electrochemical techniques supported by EmStat Pico and makes it easy to combine different measurements and other tasks.
More script features include:
▪ Use of variables
▪ (Nested) loops
▪ Logging results to an SD card
▪ Digital I/O for example for waiting for an external trigger
▪ Reading auxiliary values like pH or temperature
▪ Going to sleep or hibernate mode 

Use directly with PSTrace for Windows and PStouch for Android

If expanded with USB or Bluetooth communications, the EmStat Pico  can be used directly with our PSTrace software for electrochemistry. PSTrace enables you to find the optimal settings for your experiment and allows you to extract the generated script for the EmStat Pico. This script can be transferred directly into your (embedded) code for controlling the EmStat Pico.

The PStouch app can be downloaded for free from the Google Play store.


Main Specifications

The module works at three different modes;
Low Speed mode: for scan rates up to 1 V/s or a bandwidth of 100 Hz.
High Speed mode: for high scan rates and frequencies.
Combined Mode: a combination of the Low and High Speed modes for optimal dynamic dc-potential range.


Low Speed mode

High Speed mode

Combined mode

Full dc-potential range -1.2 to +2 V -1.7 to +2 V -1.7 to +2 V
Dynamic dc-potential range [1] 2.2 V 1.2 V 2.6 V
Compliance voltage -1.7 to +2 V [2]
Maximum current ± 3 mA
Max. acquisition rate 
100 1000 100
Potentiostat (controlled potential mode)
Channels 2 (2x WE, 2x RE and 2x CE)
Applied dc-potential resolution 537 µV 395 µV 932 µV
Applied potential accuracy < 0.2% < 0.5% < 0.5%
Current ranges 100 nA, 2 uA,
4 uA, 8 uA,
16 uA, 32 uA,
63 uA, 125 uA,
250 uA, 500 uA,
1 mA, 5 mA
100 nA, 1 uA,
6 uA, 13 uA,
25 uA, 50 uA,
100 uA,
200 uA, 1 mA,
5 mA
100 nA, 1 uA,
6 uA, 13 uA,
25 uA, 50 uA,
100 uA,
200 uA, 1 mA,
5 mA
Current accuracy < 0.5 % for
current ranges
> 100nA,
< 1% for 100nA current range
< 1% of the selected current range < 1% of the selected current range
Measured current resolution 0.006% of selected current range (5.5 pA on 100 nA range)


FRA / EIS (impedance measurements)       
Frequency range 0.016 Hz to 200 kHz
Ac-amplitude range 1 mV to 0.25 V rms, or 0.573 V p-p
Electrometer amplifier input > 1 TΩ // 10 pF
Bandwidth  250 kHz
Dimensions 30.5 mm X 18 mm X 2.6 mm

[1]  The dynamic range is the range that can be covered during a single scan within the full potential range. For example; a linear scan can start at -1.5 V and end at 1.1 V or vice versa, covering 2.6 V dynamic range.

[2] The compliance voltage is the maximum potential between Working and Counter electrode and depends on the selected mode.

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