Home Potentiostat/Galvanostat SRS EC301 Potentiostat/Galvanostat

SRS EC301 Potentiostat/Galvanostat

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Manufacturer: Stanford Research Systems

The EC301 gives electrochemists the opportunity to equip their labs with high compliance, research-grade instrumentation at a very attractive price. Stand-alone front-panel operation allows easy use in the field or in handling routine electrode preparation. The free Windows software (SRSLab) has routines for all major electrochemical experiments and can be downloaded from the SRS website.

  • ±30 V compliance voltage
  • ±1 A maximum current
  • ±15 V polarisation range
  • Front-panel setup & operation
  • Free full-featured Windows software
  • Built-in EIS to 100 kHz
  • 1 MHz control bandwidth for EIS
  • Ramps from 0.1 mV/s to 10 kV/s
  • GPIB and Ethernet interfaces 

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Additional 12 months warranty for free (2 years total) via our UK Service Centre.

Front-Panel Operation
The intuitive front panel of the EC301 allows you to quickly and easily set up several scan types (CV, LSV, steps and holds). Unlike many competitive models, the EC301 is a stand-alone instrument – you don’t need to use a computer. The array of indicator LEDs make it easy to know the state of the instrument at a glance.

Software Included
The SRSLab software supports all the major electrochemical techniques including voltammetry, pulsed waveforms, step techniques, and EIS. You can even design your own custom measurements. Data is acquired over the TCP/IP interface. The software lets you easily configure sequences of experiments and shows you the data as they are generated. The data is easily exported to spreadsheets and graphing packages. 

Designed for EIS
The EC301 was designed with electrochemical impedance spectroscopy (EIS) in mind. Instead of employing driven shields, we bring the measurement close to the cell. This means higher accuracy and less susceptibility to parasitic effects. Shunt resistor current measurements in all ranges enhance control loop stability, enabling EIS at high frequencies. An external frequency response analyzer (FRA) can be used measure EIS at frequencies up to 1 MHz using analog connections. The EC301 performs stand-alone EIS measurements up to 100 kHz. 

Compliance Limiting
Quite often, electrochemists are working with sensitive cells which would be destroyed if the full compliance of a potentiostat were brought to bear. Bubbles in a flow cell system can easily cause potentiostats to lose voltage control by blocking feedback to the instrument from the reference electrode. Without compliance limiting, a carefully prepared electrode will be ruined. With this feature, the user can simply select the maximum potential the counter electrode will be allowed to apply. When the limit is reached, it is clamped to the preset level. Compliance limiting guarantees safe operation even if control is lost. 

Optional Power Boosters
SRS offers a ±5 A (O100BST), ±10 A (O200BST), or ±20 A (O400BST) power booster for applications requiring higher current. All three models are affordably priced.

Floating Working Electrode
In normal operation, the working electrode current return path is tied to chassis ground. However, there are times in which electrochemists wish to experiment with working electrodes that are intrinsically grounded (e.g., water pipes, rebar in concrete, an autoclave). Once the shorting bar from the rear panel of the instrument is removed, the ground return path floats, allowing these experiments.

Fast Cyclic Voltammetry
The EC301 supports scan rates up to 10 kV/s. Potential, current and an auxiliary signal are all acquired simultaneously at 250,000 samples per second. Furthermore, an AC line detection circuit allows synchronization of repetitive scans with the power line cycle.

Built-in Temperature Measurement
Temperature is a critical parameter in many battery, fuel cell and corrosion experiments, but it is often not recorded. Not knowing the temperature at which the data were acquired can make it difficult to compare your results. With a built-in input for a 100 Ω platinum RTD, the EC301 makes it easy to acquire and plot temperature right along with the rest of your data.

Open Command Set
While our software supports all major electrochemical techniques, we realize that electrochemistry isn’t static. When a new technique or procedure is developed, the open command set lets experimentalists write customized software to support it. You can write in LabVIEW, MATLAB, or any other language.

Power Amplifier (CE)

Compliance voltage

±30 V

Maximum current

±1 A


>1 MHz (10 kΩ load, <100 µA)

Slew rate

≥10 V/µs

CE limit

Limits counter electrode voltage when enabled

     Set range

±500 mV to

±30 V


1 MHz

Bandwidth limit

10 Hz, 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz cutoff frequencies

Differential Electrometer (EC19 Module)

Input range

±15 V

Input impedance

>1 TΩ in parallel with 20 pF

Input bias current

<20 pA


>10 MHz


>80 dB (<10 kHz)

Potentiostat Mode

Applied voltage range

±15 V

Applied voltage resolution

500 µV (200 µV performing an automatic scan)

Applied voltage accuracy

±0.2 % of setting ±5 mV

Automatic scan rate

0.1 mV/s to 10 kV/s

Noise and ripple

<20 µVrms (1 Hz to 10 kHz)

Galvanostat Mode

Applied current ranges

±1 nA to ±1 A in decades

Applied current resolution


Applied current accuracy

     1 A range

±0.5 % of reading ±0.2% of range

     All other I-ranges

±0.2 % of reading ±0.2% of range

Automatic scan rate

1 pA/s to 2 A/s

Power Booster (Opt).

Maximum current ±5 A, ±10 A, or ±20 A

Compliance voltage

±20 V

ZRA Mode

Voltage offset

CESense and WE electrodes held within ±5 mV of each other

Voltage Measurement


±15 V




±0.2 % of reading ±5 mV

Acquisition rate

4 µs (250 kS/s)

Current Measurement


±1 nA to ±1 A in decades




     1 A range

±0.5 % of reading ±0.2% of range

     All other current ranges

±0.2 % of reading ±0.2% of range

Acquisition rate

4 µs (250 kS/s)

Analog Voltage and Current Outputs (front-panel BNCs)

Voltage output

±15 V output


±0.2 % of VRE  - VWE Sense  ±5 mV

    Output impedance

50 Ω

    Max. output current

10 mA


No filtering or 10 Hz low-pass

    Bias rejection

±15 V (full range)

Current output

±2 V

    Accuracy (1 A range)

IWE within ±0.5 % of (VBNC x IRange) ±0.2 % x IRange

    Accuracy (all other current ranges)

IWE within ±0.2 % of (VBNCx IRange) ±0.2 % x IRange

    Max. output current

10 mA


No filtering or 10 Hz low-pass

    Bias rejection

±2 V (full range)

IR Compensation

Positive feedback


3 Ω to 3 GΩ (depends on current range)


1 mΩ (1 A range), 100 kΩ (1 nA range)

Current interrupt

     Switching time

<5 µs (1 kΩ resistive load)

     Interrupt duration

100 µs to 1 s

     Interrupt frequency

0.1 Hz to 300 Hz




Frequency range

1 mHz to 100 kHz

Dynamic range

120 dB


Linear or logarithmic

Temperature Measurement


100 Ω Pt RTD


±1 °C (-100 °C to +200 °C)

Rotating Electrode Output (front-panel BNC)


0 to 10 V settable analog output


±1 % of setting ±5 mV

External Input (front-panel BNC)

Input range

±15 V (potentiostat mode), ±2 V (galvanostat mode)

     Potentiostat mode

1 V input corresponds to an applied voltage of 1 V

     Galvanostat mode

1 V input corresponds to an applied voltage of 1 A


10 kΩ in parallel with 50 pF


>1 MHz

ADD TO SCAN button

Adds the external input voltage to internally-generated scans


Takes the control voltage or current solely from the external input

Rear-Panel Inputs and Outputs


10 MHz, 1 Vpp

Raw E

±15 V output

Raw I

±2 V output (1 V full scale)

CE / 3

±10 V VCE / 3 voltage output, 1 MHz bandwidth

Sync ADC

±10 V analog input

CI sync

TTL output for IR compensation

Scan trigger

Digital input. Falling edge begins automatic scan
Program E/I ±15 V input (sum of internal and external voltage programs)
ADC 1,2,3 ±10 V analog inputs (general purpose)
SRSLab Software



Operating system



Cyclic Voltammetry (CV)
Linear Sweep Voltammetry
Cyclic Staircase Voltammetry (Tast)
Square Wave Voltammetry
Differential Pulse Voltammetry (DPV)
Differential Normal Pulse Voltammetry (DNPV)
Timed Hold
Quartz Crystal Microbalance (QCM)
Electrochemical Impedance Spectroscopy (EIS)


Communication interfaces

IEEE-488.2 and TCP/IP


17" × 5.25" × 19.5" (WHL)


26 lbs. 


One year parts and labour on defects in materials & workmanship

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