Hanna Instruments HI 3220 Benchtop pH/ORP Meter

The Hanna Instruments HI 3220 is a research-grade benchtop pH and ORP meter. It serves laboratory settings that demand high accuracy, consistent data, and clear calibration diagnostics. Furthermore, advanced electrochemistry electronics sit inside a compact benchtop casing. Consequently, the unit streamlines routine quality control, chemical analysis, and academic research workflows.

Hanna Instruments HI 3220 Measurement Capabilities and Accuracy

The HI 3220 handles multi-parameter testing across pH, ORP (mV and relative mV), and temperature. Key technical features include:

• High-Resolution pH Readings: It delivers resolution down to 0.001 pH across an expanded range (-2.000 to 20.000 pH). As a result, operators can detect even subtle chemical shifts quickly.
• CAL Check™ Diagnostic System: Hanna’s proprietary technology alerts operators to dirty electrodes, cracked glass membranes, or contaminated buffers before testing begins. Therefore, it prevents measurement drift during critical runs.
• Multi-Point Calibration: The system supports up to 5-point automatic calibration. In addition, it provides standard pre-programmed buffers alongside custom user-defined buffer values.
• Automatic Temperature Compensation (ATC): An external temperature sensor corrects pH values across -20.0°C to 120.0°C.

Hardware and Interface Features

Engineers designed the HI 3220 for heavy benchtop workloads. First, a large, backlit graphical LCD presents live readings, calibration status, and buffer icons simultaneously. Second, a sealed membrane keypad resists chemical splashes and corrosive laboratory fumes.

The complete package includes:

• A standard refillable glass-body BNC pH electrode for routine liquid testing.
• A dedicated stainless steel probe for fast temperature monitoring.
• An articulated electrode arm and base to keep probes steady at any immersion depth.

Data Management and Laboratory Uses

The meter incorporates full Good Laboratory Practice (GLP) features. Specifically, it records calibration dates, times, offset values, and slope percentages for audits. Users can log readings on demand or set timed intervals, and they can easily export recorded data to a computer via USB.

Ultimately, the Hanna Instruments HI 3220 supports pharmaceutical testing, municipal water analysis, chemical plants, and academic laboratories where traceable potentiometric data is mandatory.