PalmSens PS4&MUX8/MUX16 Eight-Channel Portable Electrochemical Workstation

Overview

The PalmSens PS4&MUX8/MUX16 is a high-precision, portable electrochemical workstation engineered for multi-sample electroanalytical research and field-deployable quality control. Built upon a modular architecture centered on the PalmSens4 core potentiostat/galvanostat, this system integrates the MUX8-R2 8-channel multiplexer to enable true parallel electrochemical measurements across up to eight independent or shared-electrode configurations. Its measurement principle is grounded in bipotentiostatic control with real-time digital feedback, supporting all standard DC and AC techniques—including cyclic voltammetry (CV), differential pulse voltammetry (DPV), square-wave voltammetry (SWV), chronoamperometry (CA), open-circuit potential (OCP), and full-frequency electrochemical impedance spectroscopy (EIS) from 10 μHz to 1 MHz. Designed for rigorous scientific use, the system maintains metrological traceability through factory-calibrated analog front-end circuitry and temperature-compensated reference electrode sensing—ensuring consistent performance across laboratory, industrial process monitoring, and remote environmental sampling environments.

Key Features

• Modular scalability: Single PS4 base unit + MUX8-R2 enables 8-channel operation; up to 16 MUX8-R2 units can be daisy-chained via Link interface for 128-channel capacity.
• Ultra-low current detection: 100 pA resolution with ≤0.1% accuracy across nine programmable current ranges—optimized for microelectrode and low-conductivity media applications.
• Broad dynamic potential control: ±10.000 V compliance range supports high-impedance coatings, battery electrode characterization, and corrosion studies under aggressive electrolytes.
• Dual power flexibility: Operates continuously for >8 hours on integrated rechargeable Li-ion battery or draws stable power via USB 2.0 (5 V, 1 A), eliminating dependency on mains outlets during field deployment.
• True channel independence: Each MUX8-R2 channel supports configurable electrode topologies—individual 2-/3-electrode cells, shared reference/counter electrodes, or monolithic sensor arrays—with per-channel OCP, grounding, or floating bias settings.
• Real-time synchronization: All channels acquire data simultaneously with sub-millisecond timestamp alignment, critical for comparative kinetics analysis and sensor array cross-validation.

Sample Compatibility & Compliance

The PS4&MUX8/MUX16 accommodates diverse electrochemical interfaces including screen-printed electrodes (SPEs), microdisk arrays, flow cells, corrosion coupons, and solid-state battery half-cells. Its hardware-level isolation and galvanic separation between channels prevent crosstalk during simultaneous measurements—even when samples exhibit large inter-channel potential differences or varying solution resistances. The system complies with IEC 61010-1:2010 safety standards for electrical equipment used in measurement, control, and laboratory applications. When operated under GLP or GMP-regulated workflows, PSTrace software (v5.6+) supports 21 CFR Part 11-compliant audit trails, electronic signatures, and user-access-controlled method locking—enabling full traceability for pharmaceutical dissolution testing, biosensor validation, and regulatory submissions.

Software & Data Management

PSTrace desktop software (Windows 10/11, 64-bit) provides full instrument control, real-time visualization, and advanced post-processing—including Kramers–Kronig validation, equivalent circuit fitting (ZView-compatible), and automated peak integration. It auto-detects connected MUX8-R2 modules and maps channel assignments without manual configuration. For mobile operation, PStouch (Android v8.0+) establishes secure Bluetooth 5.0 connections to PS4, enabling live waveform viewing, parameter adjustment, and one-touch method execution—ideal for on-site water quality screening or educational demonstrations. Raw data exports in ASCII (.txt), CSV, and binary (.psd) formats ensure compatibility with MATLAB, Python (pysens), and third-party chemometrics platforms. All acquisition metadata—including timestamps, calibration IDs, environmental logs (optional external sensor input), and operator annotations—are embedded in each dataset header.

Applications

• High-throughput sensor development: Parallel evaluation of 8 distinct modified electrode surfaces for pesticide detection, heavy metal quantification, or neurotransmitter sensing.
• Corrosion monitoring: Simultaneous polarization resistance and EIS tracking across multiple alloy specimens exposed to variable pH or chloride concentrations.
• Battery R&D: In-situ impedance mapping of cathode/anode half-cells under identical SOC/SOH conditions to isolate interfacial degradation mechanisms.
• Environmental field analysis: Real-time nitrate, phosphate, or dissolved oxygen profiling using SPE-based sensor arrays deployed in rivers, wastewater streams, or soil lysimeters.
• Academic teaching labs: Multi-station electrochemistry experiments where students configure unique electrode geometries while sharing a single PS4 base unit—reducing capital cost and lab footprint.

FAQ

Can the PS4&MUX8 operate without a PC connection?
Yes—the PS4 base unit stores pre-loaded methods internally and can execute standalone measurements (e.g., fixed-parameter CV or EIS sweeps) with results saved to onboard flash memory. Full method editing and real-time visualization require PSTrace or PStouch.
Is the MUX8-R2 compatible with older PalmSens models?
The MUX8-R2 is fully backward-compatible with PalmSens3 and EmStat Blue systems via firmware update; however, full 8-channel EIS synchronization requires PS4’s enhanced timing engine.
How is channel crosstalk mitigated during simultaneous measurements?
Each MUX8-R2 channel features isolated analog signal paths, opto-coupled digital control lines, and individually buffered reference electrode inputs—validated to < −100 dB crosstalk at 1 kHz in saline solutions.
Does the system support custom waveform generation?
Yes—PSTrace includes a built-in arbitrary waveform generator (AWG) allowing user-defined voltage/current excitation profiles (e.g., multi-step pulses, chirped EIS, or hybrid CV-EIS sequences) with µs-level timing resolution.
What calibration procedures are recommended for long-term accuracy?
PalmSens recommends annual factory recalibration traceable to NIST standards; end-users may perform daily verification using certified resistor-capacitor calibration kits (e.g., RC-10k/1nF) included with the MUX8-R2 accessory bundle.