METTLER TOLEDO FiveGo F2 Portable pH Meter

Overview

The METTLER TOLEDO FiveGo F2 Portable pH Meter is a rigorously engineered field-deployable electrochemical instrument designed for reliable, high-reproducibility pH and mV measurements in demanding non-laboratory environments. Built upon a robust potentiometric measurement principle, the F2 detects the potential difference between a pH-sensitive glass electrode and a stable reference electrode—converted into pH units via the Nernst equation under controlled temperature conditions. Its compact, ergonomic housing integrates an intuitive single-button interface and a large backlit LCD display optimized for readability in variable ambient lighting. Engineered for precision in real-world applications—from wastewater inspection and food processing lines to environmental monitoring and educational fieldwork—the F2 delivers laboratory-grade metrological performance without requiring mains power or climate-controlled infrastructure.

Key Features

• IP67-rated enclosure ensures full protection against dust ingress and immersion in water up to 1 meter for 30 minutes—validated per IEC 60529—making it suitable for outdoor, industrial, or wet-process environments.
• Automatic temperature compensation (ATC) enabled by optional integrated Pt1000 temperature probe (Order No. 12997876), or manual input for precise thermal correction across the full 0.0–100.0 °C range.
• Three-point calibration capability with four pre-programmed international buffer sets (DIN, NIST, JIS, and USA), supporting traceable calibration protocols aligned with ISO/IEC 17025 requirements.
• Auto-read function with endpoint stabilization detection eliminates subjective judgment in reading; measurement values are locked automatically when stability criteria (±0.01 pH over 3 sec) are met.
• Internal memory stores up to 200 timestamped measurement records—including pH, mV, temperature, date/time, and calibration data—with export-ready formatting for downstream QA/QC documentation.
• Modular configuration options include dedicated electrode variants: LE438 for general-purpose aqueous applications, LE427 for semi-solid or viscous food matrices, and field-optimized kits with sampling vials and rugged carry cases.

Sample Compatibility & Compliance

The FiveGo F2 accommodates a broad spectrum of sample types including aqueous solutions, beverages, dairy products, soil extracts, surface waters, and effluents—provided they fall within standard electrochemical compatibility limits for glass membrane electrodes. All bundled electrodes comply with ISE and pH electrode specifications defined in ASTM D1293 (Standard Test Method for pH of Water) and ISO 10523 (Water quality — Determination of pH). The instrument’s firmware supports GLP-compliant operation through audit-trail-capable calibration logging, user-defined ID entry, and immutable record timestamps—facilitating adherence to FDA 21 CFR Part 11 where electronic records are subject to regulatory review.

Software & Data Management

While the F2 operates as a standalone, battery-powered instrument, its stored datasets can be transferred via USB connection to METTLER TOLEDO’s free LabX Lite software (Windows-compatible) for report generation, statistical analysis (e.g., mean, SD, min/max), and PDF export. All exported files retain embedded metadata—including calibration history, operator ID, and environmental parameters—ensuring data integrity and chain-of-custody continuity. No proprietary drivers or cloud dependencies are required; raw CSV output is natively supported for integration with LIMS or ELN platforms.

Applications

• Environmental field testing: On-site pH screening of rivers, lakes, groundwater wells, and leachate collection points per EPA Method 150.1.
• Food & beverage quality control: Batch verification of acidified sauces, fermented dairy, fruit juices, and brine solutions—compatible with HACCP critical control point monitoring.
• Education & training: Robust design and simplified workflow support undergraduate chemistry labs and vocational technician programs emphasizing GMP-aligned measurement practices.
• Pharmaceutical manufacturing support: Non-sterile process water checks (PW, WFI pre-testing), cleaning validation rinse samples, and excipient slurry consistency assessment.
• Wastewater treatment operations: Real-time influent/effluent pH tracking during neutralization, coagulation, and biological treatment stages.

FAQ

Does the F2 meet ISO/IEC 17025 traceability requirements for calibration?
Yes—when used with certified reference buffers and documented calibration procedures, the F2 supports metrological traceability to national standards via its configurable calibration log and uncertainty-aware accuracy specification (±0.01 pH at 25 °C).
Can the F2 measure ORP (redox potential) in addition to pH?
Yes—the instrument provides direct mV readout across the full −1999 to +1999 mV range, enabling quantitative redox assessments using compatible combination electrodes or separate ORP sensors.
Is the LE427 food-grade electrode suitable for measuring pH in yogurt or mashed potatoes?
Yes—the LE427 features a conical tip, open junction, and food-grade polymer body designed to resist clogging and ensure stable response in heterogeneous, high-fat, or particulate-laden matrices.
What is the expected battery life under typical field use?
With standard alkaline AA batteries, continuous operation exceeds 2,000 hours; auto-power-off after 10 minutes of inactivity further extends service intervals between replacements.
Are firmware updates available, and how are they applied?
Firmware upgrades are distributed via METTLER TOLEDO’s official support portal and installed using the included USB cable and LabX Lite utility—no third-party tools or internet connectivity on the device itself are required.