Hanna HI2315 Benchtop Conductivity Meter

Overview

The Hanna HI2315 is a benchtop conductivity meter engineered for precision and repeatability in routine laboratory and quality control environments. It operates on the principle of two-electrode AC conductometric measurement, applying a low-frequency alternating current to minimize polarization effects and electrode fouling—critical for stable readings in aqueous samples with variable ionic strength. Designed for single-parameter analysis, the HI2315 delivers simultaneous measurement and display of conductivity, temperature-compensated TDS (total dissolved solids), resistivity, and salinity—each derived from the base conductivity reading using standardized conversion algorithms compliant with ASTM D1125 and ISO 7888. Its fixed-temperature compensation coefficient (β = 2.0 %/°C) aligns with common industrial calibration practices, while automatic temperature sensing via integrated Pt1000 sensor ensures accurate real-time compensation across the 0.0–50.0 °C operating range.

Key Features

• Benchtop architecture with robust ABS housing and chemical-resistant front panel—designed for long-term stability in analytical laboratories and production QC areas.
• Four selectable conductivity ranges optimized for diverse sample types: ultrapure water (0.0–199.9 µS/cm), potable water (0–1999 µS/cm), wastewater (0.00–19.99 mS/cm), and high-salinity brines (0.0–199.9 mS/cm).
• Integrated temperature sensor (Pt1000) with ±0.2 °C accuracy enables automatic temperature compensation without external probes or manual input.
• Backlit LCD display with dual-line readout showing primary parameter (e.g., conductivity) and secondary parameter (e.g., temperature) simultaneously.
• Calibration performed using one-point or two-point methods with standard KCl solutions (e.g., 1413 µS/cm or 12.88 mS/cm), supporting traceable verification per ISO/IEC 17025 requirements.
• No internal memory or data logging—intended for direct operator readout and manual recordkeeping in non-GxP environments; supports optional RS232 output for external printer or basic data capture.

Sample Compatibility & Compliance

The HI2315 is validated for use with aqueous solutions across environmental, pharmaceutical, food & beverage, and academic research applications. It is suitable for measuring deionized water, drinking water, cooling tower fluids, nutrient solutions, and low-conductivity process streams. While not certified for GLP or GMP-regulated workflows due to absence of audit trail, electronic signature, or 21 CFR Part 11-compliant software, it meets general laboratory instrumentation requirements under ISO 9001 and supports compliance with USP for purified water conductivity testing when operated within defined procedural controls (e.g., calibrated daily, electrodes cleaned per SOP). CE marking confirms conformity with EU Electromagnetic Compatibility (2014/30/EU) and Low Voltage (2014/35/EU) directives.

Software & Data Management

The HI2315 operates as a standalone instrument without embedded firmware-based data management capabilities. It does not include onboard storage, timestamping, user access control, or export functionality. Data output is limited to real-time analog display and optional serial transmission (RS232) at 9600 baud, compatible with generic terminal emulators or legacy lab printers. For regulated environments requiring electronic records, integration with external LIMS or ELN systems must be implemented at the host level—not via instrument firmware. Calibration history and measurement logs must be maintained manually or through third-party acquisition software interfacing via RS232.

Applications

• Quality assurance of purified and ultrapure water systems in pharmaceutical manufacturing (supporting USP Stage 1 and Stage 2 limits).
• Routine monitoring of boiler feedwater, condensate, and cooling loop conductivity in power generation and HVAC maintenance.
• Verification of nutrient solution concentration in hydroponic and agricultural research facilities.
• Educational laboratories for teaching fundamental electrochemical principles, including Kohlrausch’s law and equivalent conductivity.
• Environmental field labs assessing freshwater conductivity as an indicator of ionic contamination or mineral dissolution.

FAQ

Does the HI2315 support automatic temperature compensation (ATC)?

Yes—it features built-in ATC using a Pt1000 sensor with fixed β = 2.0 %/°C compensation, eliminating the need for manual correction.
Can this meter be used for USP purified water testing?

It can be deployed for Stage 1 and Stage 2 conductivity measurements if calibrated daily with NIST-traceable standards and operated within its specified temperature and range limits.
Is the HI2315 compliant with 21 CFR Part 11?

No—this model lacks electronic audit trails, user authentication, and secure data archiving required for FDA-regulated electronic records.
What electrode is recommended for the HI2315?

The HI76310 four-ring conductivity cell is the factory-recommended probe, offering optimal accuracy across all four measurement ranges and compatibility with the meter’s auto-ranging circuitry.
Does the instrument store calibration data?

No—calibration settings are retained only until power-off; recalibration is required after each restart or when changing measurement ranges.