ilium 2100 Low-Range Conductivity Meter

Overview

The ilium 2100 Low-Range Conductivity Meter is a precision benchtop instrument engineered for high-fidelity measurement of extremely low ionic conductance in non-aqueous and ultra-pure media. Unlike conventional conductivity meters optimized for aqueous electrolyte solutions, the ilium 2100 employs a low-frequency, high-impedance AC excitation architecture (<1 Hz to 1 kHz) combined with guarded electrode design and active noise cancellation circuitry to resolve conductance values as low as 5 pS—corresponding to 1 fS/cm in solvents such as hexane, toluene, or anhydrous acetonitrile. This capability makes it uniquely suited for applications requiring trace-level ion detection in hydrocarbon fuels, pharmaceutical solvents, battery electrolytes, and ultrapure water systems where traditional two-electrode or four-electrode cells fail due to polarization, stray capacitance, or dielectric loss. The instrument operates on the principle of impedance spectroscopy at sub-Hz frequencies, enabling stable, drift-free readings in high-resistivity environments without electrode fouling or Faradaic interference.

Key Features

• Ultra-low-range capability: Measures conductivity from 1 fS/cm (e.g., in dry hydrocarbons) up to 1 mS/cm (e.g., dilute saline), covering >15 decades of dynamic range in a single instrument.
• Smart probe with onboard EEPROM: Stores full calibration coefficients (including cell constant, temperature coefficient, and offset), enabling plug-and-play operation across multiple instruments without re-calibration.
• 4-digit resolution with ±1% FS ±1 digit accuracy: Verified per ASTM D1125 and ISO 7888 standards for conductivity instrumentation under controlled laboratory conditions.
• Auto-ranging with manual lockout: Automatically selects optimal gain and excitation frequency; user may fix range for repetitive testing or compliance-driven SOP execution.
• Dual-line 16-character LCD display: Simultaneously shows conductivity (with unit and exponent) and temperature (°C), updated at 2 Hz with anti-aliasing filtering.
• USB 2.0 interface compliant with CDC/ACM class: Enables direct connection to Windows/Linux hosts for real-time data streaming, batch logging, and GLP-compliant audit trail generation via included software.

Sample Compatibility & Compliance

The ilium 2100 is validated for use with low-dielectric, low-permittivity solvents (ε_r < 10), including but not limited to hydrocarbons (hexane, heptane, kerosene), chlorinated solvents (CHCl₃, CCl₄), and polar aprotic media (DMF, DMSO, NMP). It complies with IEC 61000-4-3 (radiated immunity) and IEC 61326-1 (EMC for laboratory equipment). Its measurement methodology aligns with USP for purified water and water for injection (WFI), and supports validation protocols required under FDA 21 CFR Part 11 when used with the supplied software’s electronic signature and audit log features. The smart probe meets IP67 ingress protection when capped, ensuring robustness during solvent handling.

Software & Data Management

The included ilium DataLink v3.2 software provides configurable acquisition parameters (sampling interval, averaging window, auto-zero cycle), real-time trend plotting, and CSV/Excel export with metadata stamping (timestamp, probe ID, calibration date, operator ID). All raw ADC counts and computed values are stored locally with SHA-256 checksum integrity verification. Audit trails record every configuration change, calibration event, and data export action—including user login context—meeting ALCOA+ principles for GxP environments. Data files support optional AES-256 encryption and may be archived in vendor-neutral HDF5 format for long-term reproducibility.

Applications

• Quality control of aviation turbine fuel (ASTM D3242, D7467) for chloride and sulfate ion contamination.
• In-process monitoring of lithium-ion battery electrolyte purity during synthesis (LiPF₆ in EC/DEC).
• Validation of solvent drying efficiency in API manufacturing (ICH Q5C, Q7).
• Trace ion quantification in semiconductor-grade solvents (SEMI F57).
• Research into ion transport mechanisms in ionic liquids and solid polymer electrolytes.
• Calibration reference for secondary conductivity standards in metrology labs (NIST-traceable probe validation available).

FAQ

Does the ilium 2100 require periodic recalibration by the user?

No—factory calibration is retained in the smart probe’s non-volatile memory. Users perform only performance verification using certified standard solutions (e.g., 10 nS/cm KCl in hexane); full recalibration is performed only by authorized service centers.
Can the instrument measure conductivity in viscous or particulate-laden samples?

It is not recommended for suspensions or high-viscosity fluids (>500 cP) due to potential electrode coating and flow-dependent polarization errors. Use only with filtered, particle-free samples.
Is the USB interface compatible with modern operating systems?

Yes—native CDC/ACM class support ensures plug-and-play functionality on Windows 10/11, macOS 12+, and Ubuntu 20.04+ without proprietary drivers.
What is the temperature compensation method?

Linear and non-linear (quadratic) compensation models are selectable per ASTM D1125; default uses material-specific β-coefficients stored in the probe memory.
How is measurement stability ensured at femtosiemens levels?

Through triple-shielded coaxial cabling, driven-guard electrode topology, synchronous demodulation at user-selectable frequencies, and 60-second thermal equilibrium delay before final reading capture.