HANNA HI98190 Portable Multi-Parameter pH/ORP/Temperature Meter

Overview

The HANNA HI98190 is a high-precision, field-deployable multi-parameter meter engineered for rigorous electrochemical measurement of pH, oxidation-reduction potential (ORP), and temperature in demanding laboratory, industrial, and environmental applications. Based on potentiometric principles, the instrument employs a stable reference system and high-input-impedance amplifier (≥10¹² Ω) to ensure minimal current draw from the measuring cell—critical for maintaining electrode stability and measurement fidelity across extreme pH ranges (–2.000 to 20.000). Its triple-resolution capability (0.1 / 0.01 / 0.001 pH) supports both routine QC checks and high-sensitivity research protocols, while the extended ORP range (±2000 mV) accommodates redox processes in aggressive chemical environments—including strong oxidizers, alkaline electrolytes, and wastewater streams. Designed and manufactured in Italy under ISO 9001-certified production controls, the HI98190 complies with international metrological requirements for portable electrochemical instrumentation.

Key Features

• Triple-resolution pH measurement (0.1 / 0.01 / 0.001 pH) with selectable display precision and corresponding accuracy tiers (±0.1 / ±0.01 / ±0.002 pH)
• CAL Check™ real-time electrode diagnostics—continuously monitors slope, offset, and response time to flag membrane degradation, junction clogging, or reference contamination before data integrity is compromised
• Integrated HI12963 titanium-bodied tri-combo probe featuring a glass pH sensing element, platinum ORP sensor, and Pt1000 temperature sensor—all housed in corrosion-resistant titanium with a rapid DIN connection
• Seven pre-programmed NIST-traceable pH buffer points (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) plus two user-defined calibration points; automatic recognition of up to five points per session
• GLP-compliant data logging: stores date/time stamps, calibration parameters (slope %, offset mV), probe ID, and operator notes for full traceability
• IP67-rated enclosure—fully sealed against dust ingress and submersion in 1 m water for up to 30 minutes—validated per IEC 60529 standards
• Backlit graphical LCD with intuitive icon-driven interface, on-screen calibration prompts, and auto-endpoint detection for reproducible measurements
• Configurable auto-shutdown (5 / 10 / 30 / 60 min or off) and battery status indicator for extended field operation

Sample Compatibility & Compliance

The HI98190 is validated for use with aqueous and semi-aqueous samples across diverse matrices: pharmaceutical formulations (USP <791>), electroplating baths, semiconductor rinse waters, bioreactor broths, and municipal wastewater effluents. Its titanium probe construction resists chloride-induced pitting and caustic attack—enabling reliable operation in 1 M NaOH or 30% HCl solutions when used with appropriate rinsing protocols. The instrument meets EN 61326-1 (EMC for laboratory equipment), RoHS Directive 2011/65/EU, and CE marking requirements. For regulated environments, its GLP data structure—including immutable timestamps, calibration history, and audit-ready export via HI92000 software—supports compliance with FDA 21 CFR Part 11 (when paired with electronic signature-enabled software configuration) and ISO/IEC 17025 clause 7.7 (uncertainty-aware result reporting).

Software & Data Management

Data transfer is accomplished via standard USB-B interface to Windows-based systems running HANNA’s HI92000-15 Data Management Software. This application provides full bidirectional communication: downloading stored measurements (200 records, including pH, ORP, temp, and metadata), exporting CSV or PDF reports with customizable templates, reviewing calibration logs with trend analysis, and generating instrument-specific certificates of conformance. All exported files retain embedded GLP fields (e.g., “Calibration Date”, “Slope = 98.7%”, “Offset = –12.3 mV”)—enabling direct integration into LIMS platforms or quality management systems (QMS). No cloud dependency or subscription model is required; local database storage ensures data sovereignty and offline usability.

Applications

• Pharmaceutical manufacturing: monitoring buffer preparation pH during API synthesis and final formulation (aligned with ICH Q5C stability guidelines)
• Environmental field testing: simultaneous pH/ORP profiling of sediment pore water and leachate in landfill monitoring wells (EPA Method 9040C)
• Food & beverage QA: verification of acidification steps in fermented dairy products and shelf-life validation of acidic sauces (AOAC 982.15)
• Academic research: kinetic studies of redox-coupled enzymatic reactions requiring millivolt-level ORP resolution and sub-second thermal equilibration
• Wastewater treatment: tracking nitrification/denitrification transitions via ORP drift analysis in activated sludge basins (ISO 15839)
• Electrochemistry labs: calibration verification of reference electrodes using certified Zobell’s solution and saturated calomel standards

FAQ

What electrode is included with the HI98190, and is it replaceable?
The instrument ships with the HI12963 titanium-body tri-combo probe, integrating pH, ORP, and Pt1000 temperature sensing in a single rugged assembly. It is fully replaceable and designed for >2-year service life under typical field conditions.
Does the HI98190 support automatic temperature compensation (ATC) for all parameters?
Yes—ATC is applied to both pH and ORP measurements using the built-in Pt1000 sensor. Manual temperature entry is also supported for non-contact probe configurations.
How is calibration traceability maintained for audit purposes?
Each calibration event is timestamped and logged with slope (%), offset (mV), buffer IDs used, and ambient temperature—stored onboard and exportable via HI92000 software with digital signatures for Part 11 compliance.
Can the HI98190 measure non-aqueous samples such as ethanol or glycerol solutions?
It is optimized for aqueous systems. Non-aqueous solvents require specialized electrodes and correction factors not supported by default firmware; consult HANNA Application Note AN-112 for guidance.
Is the USB interface isolated to prevent ground-loop interference during lab bench measurements?
The USB circuitry includes galvanic isolation per IEC 61000-4-5, minimizing noise coupling when connected to grounded PC systems in electromagnetically noisy environments.