Hanna HI2202 Bluetooth-Enabled Precision pH and Temperature Meter

Overview

The Hanna HI2202 is a laboratory-grade, portable pH and temperature meter engineered for precision electrochemical measurement in demanding quality control, environmental monitoring, and research applications. It operates on the fundamental principle of potentiometric pH measurement—detecting the voltage difference between a glass sensing electrode and a reference electrode immersed in an aqueous sample—then converting that potential into a pH value using the Nernst equation. Integrated automatic temperature compensation (ATC) ensures thermally corrected readings across the full operational range (–20.0 to 120.0 °C), eliminating manual correction errors. Unlike conventional wired meters, the HI2202 employs Bluetooth Smart (BLE 4.0) technology to establish a wireless, low-power connection with the HALO™ HI11102 composite pH electrode—eliminating signal degradation from cable capacitance, electromagnetic interference (EMI), and mechanical wear. This architecture supports true plug-and-play electrode interchangeability while preserving calibration integrity and traceability.

Key Features

• Bluetooth Smart (BLE 4.0) wireless interface with ≤10 m operational range and auto-pairing capability
• 5.5-inch high-contrast LCD display with 150° wide-angle viewing—optimized for benchtop, wall-mount, or handheld use
• GLP-compliant data management: timestamped calibration records include date/time, buffer IDs, slope (%), offset (mV), and electrode serial number
• Dual USB connectivity: micro-USB for charging and PC synchronization; standard USB-A for direct flash drive export of CSV-formatted logs
• Three operational modes: portable handheld, benchtop (with adjustable rotating electrode stand), and wall-mounted (for multi-user shared workspaces)
• CAL Check™ diagnostic system alerts users to electrode drift, contamination, or expired buffers by comparing current calibration performance against historical baselines
• HI11102 HALO™ electrode features dual-junction liquid junction, gel-filled electrolyte, integrated NTC thermistor, and CR2032 backup power for persistent calibration memory

Sample Compatibility & Compliance

The HI2202 is validated for use with aqueous and mildly aggressive solutions—including those containing heavy metals, Tris buffers, and low-ionic-strength matrices—thanks to the HI11102’s double-ceramic junction and diffusion-controlled gel electrolyte. Its pH measurement range (–2.000 to 16.000) meets ASTM D1293 (water pH), ISO 10523 (water quality), and USP (pharmaceutical water testing) requirements. The instrument conforms to IEC 61010-1 for electrical safety and supports audit-ready GLP/GMP workflows via immutable calibration metadata and time-stamped measurement logs. All firmware and app-based operations comply with FDA 21 CFR Part 11 principles for electronic records and signatures when used with the Hanna Lab App under configured access controls.

Software & Data Management

The Hanna Lab App (iOS/Android) transforms compatible mobile devices into fully functional pH workstations. Upon BLE pairing, the app receives real-time pH and temperature streams at 1 Hz, displays dynamic trend graphs with pinch-to-zoom navigation, and applies user-defined alarm thresholds (highlighted in yellow for warnings, red for out-of-range). Logs are automatically segmented hourly and saved as timestamped CSV files—with optional annotations for batch ID, operator, or sample notes. Data can be exported via email or cloud sync for integration into LIMS or statistical process control (SPC) platforms. On-device storage retains up to 1000 auto-recorded entries with full GLP metadata; all entries are non-volatile and retain calibration linkage even after electrode replacement.

Applications

• Environmental labs: Surface water, wastewater, and soil extract pH profiling per EPA Method 9040C
• Pharmaceutical QC: Purified water and WFI (Water for Injection) monitoring per USP
• Food & beverage: Fermentation tracking, brine analysis, and shelf-life stability studies
• Academic research: Kinetic pH titrations, enzyme activity assays, and buffer capacity validation
• Industrial process control: Electroplating bath monitoring, boiler feedwater alkalinity checks, and bioreactor pH feedback loops

FAQ

Does the HI2202 require recalibration after replacing the HI11102 electrode?
No. The HALO™ electrode stores its calibration history and identification data onboard. When paired, this information transfers automatically to the meter—preserving slope, offset, and buffer usage records without manual re-entry.
Can the HI2202 operate without a smartphone or tablet?
Yes. All core functions—including calibration, measurement, data logging, and GLP reporting—are fully autonomous on the meter’s embedded interface. Mobile devices enhance visualization and long-term data management but are not required for operation.
What temperature compensation method does the HI2202 use?
It applies automatic NTC-based temperature compensation using the built-in thermistor in the HI11102 electrode, adhering to the standardized DIN/ISO temperature coefficient algorithm for pH electrodes.
Is the HI2202 compliant with FDA 21 CFR Part 11?
While the meter itself does not include electronic signature functionality, its GLP data structure—complete with tamper-evident timestamps, operator IDs, and calibration traceability—supports Part 11 compliance when deployed within a validated IT environment using the Hanna Lab App with role-based access controls.
How is electrode diagnostics performed?
The CAL Check™ system continuously evaluates electrode response time, asymmetry potential, and calibration slope deviation. Warnings appear on-screen if slope falls outside ±85–105% or if offset exceeds ±35 mV—indicating cleaning, reconditioning, or replacement needs.