Eutech CON2700 Conductivity Meter

Overview

The Eutech CON2700 is a high-precision benchtop conductivity meter engineered for routine and regulatory-compliant measurement of electrical conductivity, total dissolved solids (TDS), salinity, resistivity, and temperature in laboratory, quality control, and environmental monitoring settings. Based on the fundamental principle of conductometric measurement—applying an alternating current across a solution and quantifying its ability to conduct electricity—the CON2700 supports both two-electrode and four-electrode (4-ring) conductivity cells, enabling accurate measurements across an exceptionally wide dynamic range (0.050 μS/cm to 500.0 mS/cm). Its design emphasizes metrological integrity: automatic range selection, built-in temperature compensation (adjustable coefficient: 0.000–10.000 %/°C; reference temperature: 15.0–30.0 °C), and automatic electrode constant calculation ensure traceable, reproducible results aligned with standard electrochemical measurement practices per ASTM D1125 and ISO 7888.

Key Features

• Auto-ranging conductivity measurement with ±1% full-scale accuracy across all ranges
• Simultaneous display of conductivity, temperature, electrode status, calibration points, date/time, and calculated cell constant
• Support for both 2-electrode and 4-ring conductivity sensors—optimized for low-conductivity ultrapure water and high-conductivity brines
• Integrated platinum black platinization circuit: enables in-situ electrode reconditioning within 5 minutes, extending sensor lifetime and maintaining surface consistency
• Backlit LCD (5.9 × 7.8 cm) with large-font, high-contrast interface for rapid visual verification under varied ambient lighting
• Password-protected menu and calibration functions to prevent unauthorized configuration changes—critical for GLP/GMP environments
• Over-range alarm and calibration expiry alerts—configurable to enforce procedural compliance
• Auto-endpoint detection ensures stable, repeatable readings without manual judgment

Sample Compatibility & Compliance

The CON2700 accommodates aqueous samples across diverse matrices—including deionized water, process streams, wastewater effluents, seawater dilutions, and pharmaceutical buffers—without requiring hardware modification. Its resistivity range (2.000 Ω to 20.0 MΩ) supports USP purified water verification, while its salinity measurement (0–80 ppt) meets ASTM D1141 seawater simulation requirements. The instrument conforms to Good Laboratory Practice (GLP) standards: all stored data (500 entries) include timestamps, operator ID (if configured), calibration history, and electrode constant values. Data export via bidirectional RS232 facilitates integration into LIMS or electronic lab notebooks compliant with FDA 21 CFR Part 11 when paired with validated software protocols.

Software & Data Management

Data logging is fully GLP-compliant: each of the 500 memory slots stores conductivity, TDS, salinity, resistivity, temperature, date/time stamp, and electrode constant. No internal battery backup is required—the unit retains data during power cycling via non-volatile memory. RS232 output supports ASCII-based transmission to PCs or printers; no proprietary drivers are needed. When connected to validated third-party data acquisition software, audit trails—including user actions, parameter edits, and calibration events—can be generated to satisfy ISO/IEC 17025 documentation requirements. Automatic storage mode enables unattended multi-point profiling over time, with configurable intervals synchronized to external triggers where applicable.

Applications

• Pharmaceutical water system validation (PW, WFI, Purified Water per USP )
• Environmental field lab analysis of surface water, groundwater, and estuarine salinity gradients
• Food & beverage QC for brine concentration, syrup density, and rinse water purity
• Electroplating bath monitoring for electrolyte conductivity stability
• Academic teaching labs—demonstrating Kohlrausch’s law, ion mobility, and temperature-dependent conductivity behavior
• Boiler feedwater and cooling tower chemistry management per ASME PTC 19.11 guidelines

FAQ

Does the CON2700 support automatic temperature compensation (ATC)?

Yes—it features programmable ATC using either fixed β-coefficients or user-defined %/°C values, with reference temperatures adjustable from 15.0 to 30.0 °C.
Can the instrument store calibration history for audit purposes?

Yes—each calibration event (up to 5 points) is timestamped and saved alongside electrode constant, date, and operator ID (if enabled), meeting GLP traceability requirements.
Is the RS232 interface compatible with modern Windows/macOS systems?

Yes—standard ASCII serial output requires only a USB-to-RS232 adapter and terminal software (e.g., Tera Term); no vendor-specific drivers are necessary.
What maintenance is required for long-term accuracy?

Regular electrode cleaning and periodic re-platinization (via the built-in circuit) every 3–6 months—depending on sample fouling—maintain optimal surface area and minimize polarization error.
Does the CON2700 meet regulatory requirements for pharmaceutical water testing?

It satisfies instrumental performance criteria outlined in USP ; however, full compliance requires documented IQ/OQ/PQ, qualified electrodes, and validated procedures per site-specific SOPs.