Hanna HI5222 Benchtop pH/ORP/ISE/Temperature Meter

Overview

The Hanna HI5222 is a high-precision benchtop multiparameter meter engineered for laboratories requiring rigorous, traceable, and repeatable measurements of pH, oxidation-reduction potential (ORP), ion-selective electrode (ISE) response, and temperature in aqueous solutions. Based on potentiometric measurement principles—employing Nernst equation-based voltage detection across glass pH electrodes, platinum or gold ORP sensors, and solid-state or liquid-membrane ISEs—the HI5222 delivers metrologically sound data aligned with international standard practices. Its architecture supports GLP/GMP-aligned workflows through mandatory metadata capture (user ID, electrode serial number, calibration history, ambient temperature), making it suitable for environmental testing labs, pharmaceutical QC, drinking water analysis, and academic research where regulatory documentation integrity is essential.

Key Features

• 7-inch capacitive touchscreen interface with intuitive icon-driven navigation and customizable home screen layouts
• Dual independent measurement channels enabling simultaneous pH/ORP and ISE measurements without cross-interference
• Advanced calibration management: up to 5-point pH (with automatic buffer recognition), 3-point ORP (using certified redox standards), and 5-point non-linear ISE calibration with slope verification and detection limit estimation
• Automatic temperature compensation (ATC) via integrated Pt1000 probe or external thermistor input; supports manual offset correction for non-aqueous media
• Real-time stability indicator and electrode diagnostics—including impedance monitoring, asymmetry potential evaluation, and slope deviation alerts—enhancing measurement confidence and preventive maintenance planning
• Robust housing rated IP54 for resistance to splashes and particulates in shared lab environments

Sample Compatibility & Compliance

The HI5222 is validated for use with standard aqueous samples across pH 0.00–14.00, ORP ±2000 mV, ISE concentration ranges spanning 1×10⁻⁶ to 1×10¹ mol/L (dependent on electrode selection), and temperature from 0 to 105 °C. It accommodates all major commercial pH, ORP, and ISE electrodes with BNC connectors and double-junction reference systems. The instrument’s firmware and data handling protocols support compliance with ISO/IEC 17025:2017 clause 7.7 (result reporting), ASTM D1293 (pH of water), ASTM D3222 (ORP of natural waters), and USP (pH measurement in pharmaceutical preparations). Audit trail functionality—including immutable timestamps, operator login tracking, and calibration event logging—is configurable to meet FDA 21 CFR Part 11 requirements when paired with networked authentication infrastructure.

Software & Data Management

Data export and remote configuration are supported via Hanna’s HI92000 PC software (Windows-compatible), which enables graphical trend analysis, report generation in PDF/CSV/XLSX formats, and database synchronization. All stored measurements include contextual metadata: date/time stamp, operator ID, electrode identification code, calibration status flag, and environmental conditions. USB-A port permits direct flash drive export; USB-B and RS232 enable connection to LIMS or SCADA systems; optional Ethernet module allows integration into centralized laboratory informatics platforms. Firmware updates are delivered via signed binary packages to ensure cryptographic integrity and version traceability.

Applications

• Environmental monitoring: routine pH and heavy metal (e.g., Pb²⁺, Cd²⁺, F⁻) ion quantification in surface water, wastewater effluents, and leachate per EPA Method 9035 and ISO 10523
• Pharmaceutical manufacturing: buffer solution verification, cleaning validation swab extract analysis, and excipient purity screening under ICH Q5C and Q7 guidelines
• Food & beverage QA: titratable acidity estimation, brine salinity control via Na⁺ ISE, and fermentation process ORP profiling
• Academic teaching labs: demonstration of electrochemical equilibria, Nernstian behavior, and sensor selectivity coefficients using standardized calibration sets

FAQ

Does the HI5222 support GLP-compliant data archiving?
Yes—when configured with user authentication and enabled audit trail settings, all measurements retain immutable timestamps, operator IDs, electrode identifiers, and calibration logs required for GLP audits.
Can ISE measurements be performed without internal temperature compensation?
No—the instrument mandates temperature input for ISE calculations; however, users may enter manual temperature values if ATC is unavailable.
Is the HI5222 compatible with non-Hanna electrodes?
Yes, provided they conform to standard BNC connectivity, output impedance ≤10¹² Ω, and reference junction compatibility with double-junction configurations.
What is the maximum data retention capacity?
The internal memory stores up to 4000 complete measurement records with full metadata; external storage via USB extends archival indefinitely.
How frequently should calibration be performed?
Calibration frequency must be determined by risk assessment per ISO/IEC 17025; Hanna recommends daily verification with check standards and full calibration before critical sample batches or after electrode replacement.