Auniontech ISX-3 Medical-Grade Bioimpedance Analyzer

Overview

The Auniontech ISX-3 Medical-Grade Bioimpedance Analyzer is a precision-engineered, single-channel impedance spectroscopy platform designed explicitly for non-clinical biomedical research applications. It operates on the principle of frequency-domain electrical impedance spectroscopy (EIS), applying small-signal alternating currents across biological tissues or cell cultures and measuring complex impedance (Z* = Z′ + jZ″) as a function of frequency from DC to 10 MHz. This wideband capability enables characterization of interfacial phenomena—including cell membrane capacitance, extracellular/intracellular conductivity, and electrode-tissue interface dynamics—critical for studies in electrophysiology, tissue engineering, biosensor development, and real-time monitoring of cellular responses under pharmacological or mechanical stimuli. Unlike diagnostic medical devices, the ISX-3 is not certified for patient diagnosis or therapeutic use; however, its hardware architecture complies with DIN EN 60601-1:2013-12 for basic safety and essential performance in laboratory-based human-subject research environments where low-risk, short-duration bioimpedance measurements are conducted.

Key Features

• Galvanically isolated Sciospec IF-4BNC front-end with medical-grade isolation (>5 kV reinforced insulation), enabling safe operation during ex vivo tissue experiments and low-risk in vivo animal studies.
• AC-coupled measurement interface with integrated high-pass filtering, eliminating DC path continuity and ensuring intrinsic current-limiting behavior—essential for minimizing electrochemical polarization and preserving biological sample integrity.
• Full-spectrum impedance acquisition from DC to 10 MHz with up to 2048 logarithmically spaced frequency points per sweep, supporting high-resolution Cole-Cole plot generation and multi-time-constant equivalent circuit modeling.
• Dual-mode excitation: fixed-frequency sweeps and adaptive frequency stepping optimized for rapid transient response capture in dynamic biological systems.
• Programmable ±8 V DC bias superposition for investigating voltage-dependent membrane properties or redox-active interfaces without compromising AC signal fidelity.
• Hardware-synchronized digital I/O via isolated Sync-In/Sync-Out ports, facilitating precise temporal alignment with external stimulators (e.g., pulse generators, optical triggers) or data acquisition systems in multimodal experimental setups.

Sample Compatibility & Compliance

The ISX-3 supports diverse biological sample configurations through flexible electrode topologies: two-point (bulk conductivity), three-electrode (reference-controlled potentiostatic), and four-electrode (Kelvin sensing) arrangements—ideal for minimizing contact impedance artifacts in high-resistivity media such as cerebrospinal fluid analogs or decellularized scaffolds. Its enclosure meets IP20 environmental protection standards and incorporates conductive shielding to suppress electromagnetic interference in shared lab spaces. While not a Class IIa medical device under MDR 2017/745, the system implements critical safeguards aligned with ISO 14971 risk management principles for laboratory instrumentation: SELV-compliant power architecture, reinforced insulation between mains and measurement circuits, and opto-isolated communication pathways. Optional medical-grade Ethernet isolators (included in standard quotation) ensure compliance with network-side isolation requirements per Clause 8.8.3.3 of DIN EN 60601-1 when interfacing with hospital-grade infrastructure.

Software & Data Management

The ISX-3 ships with Sciospec’s PC-based control suite, offering intuitive graphical configuration of sweep parameters, real-time Bode and Nyquist visualization, and batch-mode data export in CSV, HDF5, and MATLAB .mat formats. All raw and processed datasets retain full metadata—including timestamp, instrument ID, calibration status, and user-defined experimental annotations—to support GLP-aligned documentation workflows. The COM interface provides deterministic, low-latency programmatic access via native C DLLs, Java JNI bindings, LabVIEW VIs, and MATLAB instrument drivers—enabling seamless integration into custom automation frameworks or closed-loop stimulation protocols. Audit trails, user-level access controls, and electronic signature support are available through optional Sciospec Compliance Extension, satisfying 21 CFR Part 11 readiness for regulated preclinical research environments.

Applications

• Non-invasive assessment of epithelial/endothelial barrier integrity in Transwell® models using TEER (Transepithelial Electrical Resistance) and phase-sensitive impedance mapping.
• Real-time monitoring of cardiomyocyte contractility and electrophysiological maturation in 2D/3D cardiac microtissues.
• Quantification of dielectric dispersion in tumor spheroids to correlate structural heterogeneity with metastatic potential.
• Development and validation of implantable biosensors requiring stable long-term impedance drift characterization under physiological saline conditions.
• High-throughput screening of nanomaterial cytotoxicity via time-resolved impedance cytometry at subcellular resolution.

FAQ

Is the ISX-3 cleared by FDA or CE-marked as a medical device?
No. The ISX-3 is classified as a research-use-only (RUO) instrument and bears no regulatory clearance for clinical diagnosis or treatment.
Can it be used for human subject studies?
Yes—within ethics-approved non-interventional protocols involving surface electrodes or ex vivo tissue specimens, provided local institutional biosafety review confirms adherence to DIN EN 60601-1 safety provisions.
Does the system include factory calibration certificates traceable to NIST standards?
Yes. Each unit ships with a documented calibration report covering magnitude and phase accuracy across the full frequency range, traceable to national metrology institutes via Sciospec’s DAkkS-accredited calibration laboratory.
What level of technical support is available for method development?
Auniontech provides application engineering support—including protocol optimization, equivalent circuit modeling guidance, and custom script development—for academic and industrial research teams under annual service agreements.
Is firmware upgradeability supported over the instrument’s lifecycle?
Yes. Field-upgradable firmware ensures compatibility with future software releases and emerging EIS analysis methodologies without hardware modification.