ALDAS-Mini: EIS MEASUREMENT SYSTEM

Visualizing Dynamic Characteristics of Electrolysis Cells or Fuel Cells & Optimizing Operational Efficiency

Overview
Benefits
Specifications
Accessories
Downloads
Applications

The ALDAS-Mini (Electrolysis Cell Analyzer) is a compact, high-performance solution designed to accelerate R&D in electrolysis cell technology. Engineered for precision, it enables advanced analysis of electrolysis cells, playing a pivotal role in the global transition to sustainable, hydrogen-based energy systems.
Electrolysis cells are essential for generating clean hydrogen, a critical component in achieving carbon neutrality. The ALDAS-Mini empowers researchers and engineers to optimize operational parameters, reduce costs, and improve efficiency by delivering insights into cell performance under operating conditions. This system supports the pursuit of cleaner energy solutions and a sustainable future.

Product Video

This video will introduce the methods for connecting this system to the measurement target, the configuration procedures, and some measurement examples.

Key Features

Innovative impedance measurement: max. 2000 A electrolysis or load current
Ease of integration: requiring no modifications to existing systems
Simultaneous multi-cell measurement: up to 8 cells in a stack
High-precision measurements in noisy environments: consistent and reliable results
Wide compatibility: supports electrolysis cell types including PEM, SOEC, AEM, AWE, etc.

Model No. (Order Code)

EA5301-01	SENSE module 1ch
EA5301-02	SENSE module 2ch
EA5301-03	SENSE module 3ch
EA5301-04	SENSE module 4ch
EA5301-05	SENSE module 5ch
EA5301-06	SENSE module 6ch
EA5301-07	SENSE module 7ch
EA5301-08	SENSE module 8ch
EA5501	SOURCE module
EA5701	PC application software

EA5503 Includes SOURCE CABLE, LAN hub, and 3 LAN cables. A separately sold current sensor and connection cable are required for measurements. Please purchase the optional current sensor and connection cable separately.

Accelerate electrolysis cell or fuel cell development via high-current operational testing

EIS (Electrochemical Impedance Spectroscopy) measurement of electrolysis cells or fuel cell used to face challenges in measuring large cells or cell stacks with high currents. The ALDAS-Mini addresses this issue by enabling EIS measurement for a wide range of cell sizes, from small cells with electrolysis currents or load current of a few amperes to large cells with currents of up to 2000 A.

High-speed EIS measurement shortens test cycles

To observe the diffusion resistance region, impedance measurements must be extended to the low-frequency range. However, these measurements pose a challenge as they require a significant amount of time to complete. A typical electrochemical instrument, for instance, can take roughly 30 minutes to run a scan from 10 kHz to 0.01 Hz.

The ALDAS-Mini completes the same measurement in approximately 7.6 minutes*¹ across 8 channels simultaneously. This advantage in speed and parallel measurement capability significantly improves throughput for evaluating electrolysis cells and fuel cell systems.
(*1:Measurement conditions: 10 kHz to 0.01 Hz, 30 points, fast mode)

Stable, high-accuracy measurement down to the low-frequency range

Our current sensor method avoids the temperature drift issues common with shunt methods. High precision current measurement ensures stable results with minimal variation, even at low frequencies below 1 Hz.

Designed for seamless setup, requiring no modifications to existing systems

No modification to your electrolysis system is needed to set up the ALDAS-Mini.
Unlike conventional booster-equipped FRA (Frequency Response Analyzer) devices, the ALDAS-Mini operates seamlessly alongside the cells' DC power supplies.

STEP 1: Applied current connection
Connect the SOURCE module to the cell’s power source terminal with the SOURCE Cable.
The SOURCE module applies AC current for measurement.

STEP 2: Measurement line connection
Attach the current sensor to measure the current. Then, connect the SENSE cable to the cell to measure the voltage (both connected to the SENSE module).

STEP 3: Start measurement
Start the measurement after configuring the necessary settings in the dedicated PC software.
The I-V curve and Nyquist plot are displayed simultaneously in real-time, with impedance calculated from the measured current and voltage.

Basic specification

Accuracy guaranteed: 1 year

Measurement target	Electrolysis cell, fuel cell, cell stack
Measurement parameters	Impedance (R,X,θ,Z), voltage (V), current (I)
Measurement modes	Logging Mode, EIS Mode
Display modes	Nyquist plot, Bode plot, logging plot
Measurement voltage range	250 mV to 60 V
Measurement current range	100 mA to 500 A (CT6845A) Maximum 2000 A (depending on the combination of sensors)
Max. applied measurement signal	40 Ap-p (at 5 V) Derating applies for voltages above 5 V
Measurement frequency range	10 mHz to 100 kHz
Number of input channels	1 to 8 channels
Dimensions and weight	SENSE Module EA5301 (with 8 channels): approx. 430W × 221H × 361D mm (16.9W × 8.7H × 14.2D in.) (excluding protruding parts), approx. 12.7 kg (28.0 lbs) SOURCE module EA5501: approx. 520W × 197H × 540D mm (20.5W × 7.8H × 21.3D in.) (excluding protruding parts), approx. 27.0 kg (59.5 lbs) (not including cables)
Power supply	100 V to 240 V AC, 50 Hz/60 Hz, 500 VA
PC requirements	OS: Windows 11 Interface: wired LAN