ATAGO PAL-Fruit & Jam (pH) Portable pH Meter

Overview

The ATAGO PAL-Fruit & Jam (pH) is a dedicated portable pH meter engineered for rapid, reliable, and repeatable pH measurement in high-acid food matrices—specifically formulated for fresh fruits, fruit purees, jams, jellies, preserves, and other viscous or particulate-laden acidic samples. Unlike general-purpose benchtop or handheld pH meters, this instrument integrates a specialized electrode architecture and optimized signal conditioning circuitry to withstand prolonged exposure to low-pH environments (down to pH 0.00) without drift or coating-induced response lag. Its measurement principle follows the Nernst equation-based potentiometric detection of hydrogen ion activity, with built-in solid-state reference and pH-sensitive glass membrane technology calibrated per ISO 3696 (Grade 3 water) and ASTM E70-22 standards for pH measurement methodology. Designed for field use and production-line QC, it delivers laboratory-grade accuracy in a palm-sized form factor.

Key Features

• Dedicated electrode design with enhanced acid resistance—minimizes glass membrane corrosion and junction clogging during repeated analysis of fruit pulps, syrups, and pectin-rich jams.
• High-precision analog-to-digital conversion with 0.01 pH resolution and ±0.01 pH accuracy at 25 °C, validated against traceable NIST-certified buffer standards.
• Automatic temperature compensation (ATC) across 10–40 °C using an integrated thermistor, ensuring pH readings are corrected per the sample’s actual temperature without manual input.
• Minimal sample requirement of only 0.6 mL—enables testing directly from processing vessels, jars, or small-batch pilot runs without dilution or transfer losses.
• Two-point or three-point calibration support using internationally recognized buffer sets (pH 4.01/6.86/9.18 or pH 4.01/7.00/10.01), compliant with ISO 17025 calibration traceability requirements.
• Robust, IP65-rated housing with chemical-resistant casing—suitable for humid, sugar-coated, or splash-prone environments typical of jam kitchens, juice lines, and orchard-side testing stations.

Sample Compatibility & Compliance

The PAL-Fruit & Jam (pH) is validated for direct measurement of non-homogeneous, semi-solid, and high-sugar food systems—including whole-fruit purees (e.g., apple, strawberry, plum), cooked jam batches, marmalades, fruit fillings, and fermented fruit preparations. Its electrode geometry accommodates suspended particles up to 200 µm without compromising junction integrity. The device complies with IEC 61000-4 electromagnetic compatibility standards and meets CE marking requirements for electrical safety. While not intended for sterile or GMP-critical final-release testing, its calibration protocol and documented uncertainty budget align with internal QC procedures under HACCP, SQF Code Edition 9, and FDA Food Safety Modernization Act (FSMA) preventive control frameworks.

Software & Data Management

This is a standalone, microprocessor-controlled instrument with no Bluetooth, USB, or PC connectivity. All operations—including calibration, measurement, and unit selection—are executed via tactile keypad navigation. Results are displayed on a high-contrast LCD with backlighting for low-light environments. No data logging or export functionality is included; however, the instrument supports GLP-compliant manual recordkeeping through standardized entry fields (operator ID, sample ID, date/time stamp, calibration status). Users may integrate readings into LIMS or Excel workflows via manual transcription—consistent with audit-ready documentation practices in ISO 22000-certified facilities.

Applications

• Real-time pH monitoring during jam and jelly cooking to verify acidification thresholds required for microbial stability (e.g., pH ≤ 4.6 for Clostridium botulinum inhibition).
• QC verification of fruit raw material acidity pre-blending in juice concentrate production.
• Process validation for pectin gelation onset in low-sugar jam formulations.
• In-field ripeness assessment via titratable acidity correlation in orchard and post-harvest sorting facilities.
• Regulatory compliance checks for national labeling standards (e.g., EU Regulation (EC) No 1169/2011, USDA FSIS Directive 7120.1) requiring pH declaration on fruit product packaging.

FAQ

Is the PAL-Fruit & Jam (pH) suitable for measuring pH in highly viscous or pulpy samples?
Yes—the electrode tip geometry and junction design are optimized to maintain stable potential response in semi-solid matrices such as mashed berries, citrus marmalade, and stone-fruit compotes without air bubble entrapment or slow equilibration.
Does this model support automatic calibration recognition?
No—it requires manual selection of buffer values during calibration; users must confirm each standard’s nominal pH before proceeding.
Can the device be recalibrated in the field without tools?
Yes—calibration is fully accessible via front-panel controls using standard buffer solutions; no screwdrivers or software utilities are needed.
What is the expected electrode service life under routine fruit-acid testing?
With proper storage in ATAGO-recommended KCl storage solution and weekly cleaning with mild detergent, the electrode typically maintains specification performance for 12–18 months in continuous QC use.
Is battery replacement user-serviceable?
Yes—two AAA alkaline batteries are housed behind a sealed, tool-free access door; battery life exceeds 10,000 measurements per set under typical usage conditions.