Hanna HI3222 Benchtop pH/ORP/ISE/Temperature Meter
| Brand | Hanna Instruments |
|---|---|
| Origin | USA |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Product Category | Imported |
| Model | HI3222 |
| Instrument Type | Benchtop |
| Parameter Types | pH, ORP, ISE, Temperature |
| pH Accuracy | ±0.01 pH / ±0.002 pH |
| ORP Accuracy | ±0.2 mV |
| ISE Accuracy | ±0.5% of reading (monovalent), ±1% of reading (divalent) |
| Temperature Accuracy | ±0.4°C |
| pH Range | –2.0 to 20.000 pH (selectable resolution: 0.1 / 0.01 / 0.001 pH) |
| ORP Range | ±2000 mV (resolution: 0.1 mV / 1 mV) |
| ISE Range | 1.00 × 10⁻⁷ to 1.00 × 10¹⁰ (units selectable: ppm, mol/L, mg/L, %, etc.) |
| Temperature Range | –20.0 to 120.0°C (resolution: 0.1°C) |
| Calibration | Up to 5-point pH auto-calibration with 7 built-in NIST/USA standard buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) + 5 user-defined points |
| ISE Calibration | Up to 5-point with 6 stored standards (0.1–10,000 concentration units) |
| Temperature Compensation | Automatic or manual (–20.0 to 120.0°C) |
| Input Impedance | ≥10¹² Ω |
| Data Storage | Manual — 400 records |
| Auto — 1000 records (configurable intervals | 5 s to 180 min) |
| Connectivity | USB interface (requires optional HI92000 software and cable) |
| Display | Backlit LCD with real-time status icons and electrode performance feedback |
| Power Supply | 12 VDC adapter |
| Operating Environment | 0 to 50°C, ≤55% RH |
| Dimensions & Weight | 235 × 207 × 110 mm, 1.8 kg |
Overview
The Hanna HI3222 is a high-precision benchtop multiparameter meter engineered for rigorous laboratory environments requiring traceable, repeatable electrochemical measurements. It operates on the fundamental principles of potentiometric analysis: pH and ORP are determined via Nernst equation-based voltage measurement across a glass/reference electrode system, while ion-selective electrode (ISE) quantification relies on logarithmic response to activity of target ions in solution. Temperature compensation is applied using either integrated Pt1000 thermistor (HI7662 probe) or user-entered values, ensuring thermodynamic consistency per ISO 3696 and ASTM D1293. Designed for compliance-critical workflows—including environmental testing, pharmaceutical QC, and academic research—the HI3222 delivers metrological integrity through NIST-traceable calibration protocols and dual-level accuracy verification (±0.002 pH at 25°C under controlled conditions).
Key Features
- Triple-mode operation: Simultaneous or independent measurement of pH, ORP (redox potential), ISE (ion concentration), and temperature—enabling full electrochemical profiling in a single instrument.
- Adaptive 5-point pH calibration with diagnostic feedback: After calibration, the display reports electrode slope (%), offset (mV), and asymmetry potential—providing immediate assessment of electrode health per USP and EP 2.2.3 guidelines.
- Intelligent self-diagnostics: Real-time electrode impedance monitoring, buffer recognition, and drift detection alert users to contamination, aging membranes, or degraded calibration standards before measurement errors occur.
- Configurable data integrity controls: User-definable “out-of-range” and “calibration expired” warnings support GLP/GMP documentation requirements and prevent unauthorized use beyond defined validity windows.
- High-resolution backlit LCD with contextual prompts: On-screen guidance walks users through calibration, ISE standardization, and measurement setup—reducing operator dependency and training overhead.
- Robust data management architecture: Manual storage of 400 entries and automated logging of up to 1000 measurements with timestamp, temperature, and electrode ID metadata—fully exportable via USB for audit-ready reporting.
Sample Compatibility & Compliance
The HI3222 supports universal BNC-compatible pH and ISE electrodes (e.g., HI1131B, HI4110) and the HI7662 temperature probe, enabling rapid method transfer across sample matrices—from low-ionic-strength ultrapure water (≥18.2 MΩ·cm) to highly buffered biological fluids and aggressive industrial process streams. Its wide pH range (–2.0 to 20.000) accommodates non-aqueous solvents and concentrated alkali solutions when paired with specialized electrodes. All calibrations reference NIST/USA-certified standard solutions (pH 1.68, 4.01, 6.86, etc.), ensuring traceability to national metrology institutes. The instrument meets IEC 61010-1 safety standards for laboratory electrical equipment and is designed to support 21 CFR Part 11-compliant workflows when used with validated HI92000 software (electronic signatures, audit trails, and user access control).
Software & Data Management
Data acquisition and post-processing are facilitated through Hanna’s HI92000 Windows-based software suite (sold separately). This application enables full configuration of measurement parameters, real-time graphing, statistical analysis (mean, SD, RSD, confidence intervals), and PDF report generation with embedded calibration certificates. All stored data retain native timestamps, electrode identifiers, and environmental metadata—critical for ISO/IEC 17025 accreditation. USB communication uses CDC-class virtual COM port protocol, eliminating driver installation on modern Windows systems. Raw CSV exports are compatible with LIMS integration and third-party analytical platforms including MATLAB and Python-based data pipelines.
Applications
- Environmental labs: Monitoring pH and heavy metal ions (e.g., Pb²⁺, Cd²⁺, F⁻) in wastewater per EPA Method 150.1 and ISO 10523.
- Pharmaceutical QA/QC: Verification of buffer preparation, dissolution media pH, and residual chloride in parenteral formulations per USP and Ph. Eur. 2.2.3.
- Food & beverage R&D: Precise titration endpoint detection, acidulant concentration profiling, and shelf-life stability studies.
- Academic electrochemistry: Teaching Nernstian behavior, selectivity coefficient determination (Kpot), and membrane response kinetics.
- Industrial process control: In-line verification of cleaning-in-place (CIP) rinse pH and conductivity correlation in bioreactor feedstocks.
FAQ
What calibration standards are supported for pH and ISE modes?
The HI3222 includes seven factory-programmed NIST/USA pH buffers (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) and six ISE standard concentrations (0.1–10,000 units). Users may add five custom pH points and additional ISE standards via the setup menu.
Does the instrument support automatic temperature compensation during ISE measurements?
Yes—ATC is applied to both pH and ISE readings when the HI7662 probe is connected; manual entry is available if external temperature data is preferred.
How is measurement uncertainty documented for regulatory submissions?
The HI3222 logs calibration date, slope, offset, and electrode ID with each measurement. When paired with HI92000, full electronic audit trails—including user login, parameter changes, and data export history—are generated in compliance with FDA 21 CFR Part 11 Annex 11 requirements.
Can the HI3222 measure low-conductivity samples like deionized water?
Accurate pH measurement in ultrapure water requires a low-resistance electrode (e.g., HI1131B) and careful technique to minimize junction potential errors; the HI3222’s 10¹² Ω input impedance minimizes loading effects, but users must follow ASTM D1129 guidance for such applications.
Is firmware upgrade capability available?
Yes—field-upgradable via USB using Hanna-provided firmware files and HI92000 software, ensuring long-term compatibility with evolving regulatory and methodological requirements.
