Eutech COND 6+ Portable Conductivity Meter
| Brand | Thermo Fisher Scientific |
|---|---|
| Origin | Singapore |
| Manufacturer | Eutech Instruments (a Thermo Fisher brand) |
| Type | Imported |
| Model | COND 6+ |
| Price | Upon Request |
Overview
The Eutech COND 6+ Portable Conductivity Meter is a rugged, field-deployable electrochemical instrument engineered for reliable measurement of electrical conductivity and temperature in aqueous solutions. Based on the principle of two-electrode AC conductivity measurement—employing a constant-frequency alternating current to minimize polarization effects and electrode fouling—the COND 6+ delivers stable, reproducible readings across five decades of conductivity range (0.00 µS/cm to 199.9 mS/cm). Its compact handheld architecture, IP54-rated enclosure, and integrated automatic temperature compensation (ATC) make it suitable for routine water quality monitoring in environmental fieldwork, wastewater treatment plants, aquaculture facilities, and educational laboratories where portability, battery autonomy, and operational simplicity are critical.
Key Features
- Five-range automatic conductivity detection with seamless range switching and real-time auto-scaling display
- Integrated ATC using a built-in NTC thermistor sensor (0.1 °C resolution), configurable for manual or automatic compensation between 0–80 °C
- Four-point automatic or five-point manual calibration with buffer recognition (including USP/ISO-standard KCl solutions)
- Precision of ±1% full-scale + 1 LSD across all ranges, traceable to NIST-traceable reference standards
- Adjustable temperature coefficient (0.0–3.0 %/°C) and selectable reference temperature (20.0 °C or 25.0 °C) per ASTM D1125 and ISO 7888
- Low-power single-line LCD (4.5 × 2.3 cm) with high-contrast segment display optimized for outdoor visibility
- Automatic shutdown after 20 minutes of inactivity; >100 hours of continuous operation on four AAA alkaline cells
- Built-in self-diagnostic routines with error code reporting (e.g., E1 = open circuit, E2 = shorted cell, E3 = temperature sensor fault)
- BNC and 2.5 mm phono input compatibility for interchangeable conductivity cells (cell constants: 0.1, 1.0, 10.0 cm⁻¹)
Sample Compatibility & Compliance
The COND 6+ is validated for use with low-to-medium ionic strength samples including freshwater, surface water, drinking water, boiler feedwater, and process rinse water. It is not intended for high-salinity seawater (>50 mS/cm) or viscous, particulate-laden, or strongly oxidizing media without appropriate cell cleaning protocols. The instrument complies with IEC 61010-1:2010 for electrical safety and meets IP54 ingress protection requirements per IEC 60529. Calibration procedures align with EPA Method 120.1 and ASTM D1125-20 for conductivity determination in water. While not 21 CFR Part 11 compliant out-of-the-box, audit trails and calibration logs may be manually documented to support GLP/GMP-aligned workflows in regulated environments.
Software & Data Management
The COND 6+ operates as a standalone field instrument without onboard data logging or PC connectivity. All measurements are displayed in real time only; no internal memory or USB/Bluetooth interface is provided. Users must record values manually or integrate with external logging systems via visual readout. For laboratories requiring electronic records, Thermo Fisher recommends pairing the COND 6+ with the optional Eutech PC Link software (used with legacy Eutech data loggers) or migrating to the newer Thermo Scientific Orion Star A212 series for full GLP-compliant data capture, timestamped calibration history, and password-protected method storage.
Applications
- Field-based assessment of total dissolved solids (TDS) and salinity in groundwater and surface water surveys
- Routine QC checks of purified water systems (PW, WFI) in pharmaceutical manufacturing per USP
- Monitoring conductivity drift in reverse osmosis (RO) and deionization (DI) effluent streams
- Educational demonstrations of ionic mobility, electrolyte concentration relationships, and temperature dependence of conductivity
- Pre-screening of industrial cooling tower water for scaling potential and corrosion risk evaluation
- Calibration verification of inline conductivity sensors used in bioreactor and fermentation control systems
FAQ
Does the COND 6+ support GLP-compliant calibration documentation?
No—the device lacks internal memory, electronic signature capability, or audit trail generation. Calibration must be recorded manually in a lab notebook or LIMS-compatible spreadsheet.
Can the instrument measure resistivity or salinity directly?
It calculates resistivity inversely from conductivity (ρ = 1/σ) but does not output salinity values; users must apply empirical conversion factors (e.g., PSS-78) externally.
Is the included electrode suitable for high-accuracy laboratory work?
The standard K=1.0 cell is optimized for general-purpose field use; for metrological-grade accuracy, a certified platinum black cell with individual calibration certificate is recommended.
What is the recommended recalibration frequency?
Per ISO/IEC 17025 guidance, recalibrate before each batch of field measurements—or at minimum daily—using two-point verification (e.g., 1413 µS/cm and 12.88 mS/cm KCl standards).
Can the temperature sensor be calibrated independently?
No—the NTC sensor is factory-trimmed and non-adjustable; verification against a traceable RTD or mercury thermometer is advised prior to critical measurements.
