ECA-5M
Made for high-frequency EIS with a low noise floor.
A potentiostat and impedance analyser built around an analog lock-in amplifier. The 5 MHz upper frequency and 1 fF capacitance resolution suit biosensors, thin films, and other low-capacitance systems. It has no galvanostat mode and is limited to 50 mA.
Highlights
- EIS up to 5 MHz
- DAC: 80 MSPS
- 1 fF resolution
- 0.1 pA resolved current step on the ±1 nA range
- Portable, runs from USB-C
Example measurements
Three time constants in one sweep
A cell with three RC time constants, measured from 1 MHz to 1 Hz in 150 logarithmic steps, 20 mV RMS, at open-circuit potential. Each semicircle is one time constant; resolving the fastest of them is what the 5 MHz front-end is for. Plotted in Sensitify Studio with equal axis scaling.
Excitation at 5 MHz
Oscilloscope capture of the ECA-5M excitation signal: a 1 mV RMS sine at 5.0000 MHz. Illustrates signal generation; not an accuracy specification.
Photos
Supported techniques
In the box
- ECA-5M instrument
- Four 30 cm stackable banana plug leads
- Four detachable crocodile clips
- USB-C cable
- Test fixture
- Dummy cell
- Carrying case
Specifications
General
- Input voltage
- USB 5 V
- Max current
- 200 mA
Potentiostat
- Modes
- Potentiostat + EIS
- Potential range
- ±2 V
- Compliance voltage
- ±2 V
- Potential resolution
- 0.001 mV
- Current range
- ±50 mA
- Minimum resolved current step
- 0.1 pA on the ±1 nA range
- Max scan rate
- 0.3 V/s
- Analog-to-digital converter
- 24-bit
- Digital-to-analog converters
- 2× 16-bit (coarse & fine)
Impedance
- Frequency range
- 10 µHz to 5 MHz
- Frequency resolution
- 10 µHz to 0.3 mHz
- AC potential range
- 1 to 350 mV
- AC potential resolution
- 0.1% of range
- Max current
- 50 mA
- DAC sampling rate
- 80 MSPS
- Signal acquisition
- 24-bit ADC + analog lock-in amplifier
Every instrument is factory-calibrated and tested before shipment.
