ATAGO PR-50HO Hydrogen Peroxide Concentration Meter (Refractometer)

Overview

The ATAGO PR-50HO Hydrogen Peroxide Concentration Meter is a portable, handheld refractometer engineered for rapid, on-site quantification of hydrogen peroxide (H₂O₂) concentration in aqueous solutions—specifically optimized for aseptic packaging line validation and routine quality control in beverage and dairy carton sterilization processes. It operates on the principle of critical-angle refractometry: as light passes through a sample placed on the prism surface, the degree of refraction correlates directly with the solution’s solute concentration. The instrument converts this optical measurement into a mass-weighted percentage (w/w %) of H₂O₂ using a factory-calibrated dispersion curve derived from certified reference standards traceable to JIS Z 8013 and ISO 21748. Unlike titrimetric or spectrophotometric methods, the PR-50HO requires no reagents, generates no chemical waste, and delivers results in under three seconds—making it ideal for high-frequency verification at fill-line entry points, CIP rinse monitoring, and post-sterilization bath sampling.

Key Features

• Optimized optical system with high-precision Abbe-type prism (BK7 glass) and temperature-compensated scale for consistent readings across 5–40°C ambient and sample conditions.
• Integrated Automatic Temperature Compensation (ATC) algorithm compliant with ISO 2859-1 sampling plans for continuous process verification.
• Rugged, IP64-rated housing resistant to dust ingress and water splashes—suitable for humid, washdown-intensive packaging environments.
• Single-hand operation with large, high-contrast LCD display and backlight for low-light inspection zones.
• Calibration verification via ATAGO-standard 0.0% and 35.0% H₂O₂ reference fluids (sold separately); calibration certificate available upon request for GLP-compliant documentation.
• Battery-powered design (9V alkaline, 006P) enables uninterrupted use during shift changes and mobile audits without dependency on fixed power outlets.

Sample Compatibility & Compliance

The PR-50HO is validated exclusively for clear, homogeneous, non-viscous aqueous hydrogen peroxide solutions—primarily those used in aseptic packaging sterilization (e.g., Tetra Pak®, SIG Combibloc® compatible formulations). It is not intended for use with stabilized or surfactant-modified H₂O₂ blends, organic solvent mixtures, or suspensions. Measurement accuracy assumes proper prism cleaning between samples using lint-free wipes and deionized water to prevent residue-induced drift. The device meets CE marking requirements under Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and its optical calibration methodology aligns with ASTM D1218–22 (Standard Test Method for Refractive Index of Transparent Liquids) and USP Refractometry. For regulated facilities, the instrument supports audit-ready documentation when paired with ATAGO’s optional calibration logbook (Cat. No. 3478-LOG).

Software & Data Management

The PR-50HO is a standalone, analog-optical instrument with no embedded microprocessor or digital connectivity; therefore, it does not support Bluetooth, USB export, or cloud synchronization. All measurements are displayed locally and recorded manually. This architecture eliminates firmware validation overhead and ensures long-term stability—critical for GMP-regulated environments where software qualification (per FDA 21 CFR Part 11) would otherwise be required. Users may integrate readings into LIMS or MES systems via manual entry or barcode-assisted logging using ATAGO’s companion QR-coded sample labels (optional accessory). Calibration history and operator ID can be maintained in paper-based or electronic QA logs aligned with ISO 9001:2015 clause 7.1.5.2.

Applications

• Real-time verification of H₂O₂ concentration in sterile barrier coating baths prior to carton web immersion.
• Monitoring residual H₂O₂ levels in final rinse water to ensure compliance with EU Directive 2002/72/EC migration limits for food contact materials.
• Pre-shift calibration checks and in-process verification during changeovers between product formats (e.g., juice vs. UHT milk).
• Supporting root-cause analysis during sterility failures by correlating concentration excursions with microbial challenge test outcomes.
• Training tool for new line operators due to intuitive interface and immediate visual feedback—reducing reliance on centralized lab testing.

FAQ

Can the PR-50HO measure stabilized or catalyzed hydrogen peroxide solutions?

No. The optical calibration is valid only for unstabilized, aqueous H₂O₂ solutions free of thickeners, chelators, or transition-metal catalysts that alter refractive index behavior.
Is periodic recalibration required, and how often?

Yes. ATAGO recommends daily verification using certified reference standards before first use and after any temperature shock or mechanical impact; full recalibration by an authorized service center is advised every 12 months or after 5,000 measurements.
Does the instrument comply with FDA 21 CFR Part 11 for electronic records?

Not applicable—the PR-50HO produces no electronic records. Its analog operation inherently satisfies regulatory expectations for instruments excluded from Part 11 scope under FDA guidance “General Principles for Software Validation.”
What maintenance is required beyond prism cleaning?

Battery replacement every 6–12 months under typical usage; prism surface inspection for scratches or etching every 3 months using 10× magnification; storage in the supplied protective case with silica gel desiccant to prevent humidity-related fogging.
Can it be used for concentrations outside 0.0–50.0% (w/w)?

No. Readings beyond this range fall outside the calibrated dispersion curve and will produce non-linear, non-traceable results. For higher-concentration stock solutions (>50%), dilution with certified deionized water and correction calculation are mandatory.