METTLER TOLEDO FiveGo F2-Standard Portable pH Meter

Overview

The METTLER TOLEDO FiveGo F2-Standard Portable pH Meter is an engineered solution for field-deployable, high-reproducibility electrochemical measurements in demanding environments. Based on potentiometric measurement principles, the instrument determines hydrogen ion activity via a glass-membrane pH electrode coupled with a stable reference system—enabling direct voltage-to-pH conversion using the Nernst equation. Designed for compliance with ISO/IEC 17025 and aligned with GLP documentation requirements, the F2-Standard supports traceable, auditable measurements across laboratory, production line, and outdoor applications. Its compact form factor, robust mechanical architecture, and dual-parameter capability (pH and ORP) make it suitable for routine quality control, environmental monitoring, wastewater analysis, and educational use where portability, reliability, and regulatory readiness are essential.

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 humid, dusty, or rain-exposed operational zones.
• Ergonomic, one-handed operation with tactile button layout and foldable rear stand for stable benchtop viewing without external mounts.
• High-contrast graphical LCD with intuitive icon-based interface displays real-time pH/ORP values, electrode status (e.g., slope, offset), calibration history, temperature compensation status, and battery level simultaneously.
• Integrated Intelligent Sensor Management (ISM) compatibility enables automatic electrode recognition, lifetime tracking, and calibration parameter recall—reducing operator error and supporting 21 CFR Part 11-compliant workflows when paired with optional data logging software.
• Pre-configured NIST-traceable calibration routines with support for 2- or 3-point calibration using standard buffer sets (e.g., pH 4.01, 7.00, 10.01) ensure metrological consistency across shifts and operators.
• Powered by standard AA batteries (included), delivering >2,000 hours of continuous operation under typical usage conditions; low-power firmware extends service intervals and minimizes downtime.

Sample Compatibility & Compliance

The F2-Standard accepts standard BNC-compatible pH and ORP electrodes, including the supplied LE438 IP67 gel-filled combination electrode optimized for rapid response in aqueous, semi-aqueous, and mildly turbid samples. It complies with EN 61326-1 (EMC for laboratory equipment), EN 61010-1 (safety requirements for electrical equipment), and meets CE marking directives. For regulated industries, its calibration traceability to NIST standards supports adherence to ASTM D1293 (pH of water), ISO 10523 (water quality — determination of pH), and USP (pH measurement). The device does not require external PC connectivity for basic operation but retains full audit trail functionality when used with METTLER TOLEDO LabX Lite software for electronic record retention.

Software & Data Management

While the F2-Standard operates autonomously, its embedded memory stores up to 200 measurement records—including timestamp, measured value, temperature, electrode ID (when ISM-enabled), and calibration metadata. Data export is supported via optional USB cable and METTLER TOLEDO’s free MT-Smart software, enabling CSV export, statistical summary generation (mean, SD, min/max), and PDF report creation with customizable headers. All exported files retain unalterable timestamps and user-defined sample IDs, satisfying basic ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate) data integrity criteria. Firmware updates are delivered through the manufacturer’s secure portal and validated per IEC 62304 Class B software lifecycle requirements.

Applications

• Field-based environmental testing: surface water, groundwater, soil leachates, and wastewater effluents per EPA Method 150.1 and ISO 5667-11.
• In-process monitoring of fermentation broths, cleaning-in-place (CIP) rinse cycles, and bioreactor feed streams in pharmaceutical and food manufacturing.
• Educational laboratories requiring rugged, entry-level instrumentation compliant with undergraduate chemistry curriculum standards (e.g., ACS Guidelines).
• Swimming pool and spa maintenance, aquaculture pond management, and hydroponic nutrient solution control.
• QA/QC verification of buffer solutions, reagent stability, and electrode performance validation prior to critical analytical runs.

FAQ

Does the F2-Standard support automatic temperature compensation (ATC)?

Yes—it features integrated Pt1000 temperature sensing and supports both manual and automatic temperature compensation across the full 0 °C to 100 °C range.
Can the LE438 electrode be used for non-aqueous or high-ionic-strength samples?

The LE438 is optimized for aqueous solutions; for non-aqueous or viscous media, METTLER TOLEDO recommends the InLab® Science or InLab® Expert Pro electrodes with specialized junctions.
Is calibration verification possible without recalibrating?

Yes—the instrument allows post-calibration verification using a check buffer, displaying deviation from expected value and prompting corrective action if outside ±0.05 pH.
What is the warranty coverage for the F2-Standard and included electrode?

The instrument carries a 2-year limited warranty; the LE438 electrode is covered for 6 months against manufacturing defects under normal use conditions.
Does the device meet FDA 21 CFR Part 11 requirements out-of-the-box?

Standalone operation does not fulfill full Part 11 requirements; however, when integrated with LabX Lite and configured with user roles, electronic signatures, and audit trail activation, it supports compliant data handling per Part 11 Annex A guidance.