ATAGO PR-50HO Hydrogen Peroxide Concentration Refractometer

Overview

The ATAGO PR-50HO Hydrogen Peroxide Concentration Refractometer is a precision handheld optical instrument engineered for rapid, on-site quantification of hydrogen peroxide (H₂O₂) concentration in aqueous solutions—specifically optimized for quality control in aseptic packaging sterilization processes. It operates on the principle of refractive index measurement: as H₂O₂ concentration increases in water, the solution’s refractive index changes linearly and predictably within the 0.0–50.0% (w/w) range. The device incorporates Abbe-type optical design with high-stability prisms and calibrated scale optics, enabling direct readout of H₂O₂ mass fraction without chemical reagents or dilution. Its automatic temperature compensation (ATC) algorithm corrects for thermal drift across the operational ambient range (5–40°C), ensuring consistent accuracy independent of environmental fluctuations—a critical requirement for cleanroom and production-line deployment.

Key Features

• Direct digital readout of H₂O₂ concentration in % (w/w) with 0.1% resolution and ±0.5% measurement accuracy.
• Integrated automatic temperature compensation (ATC) based on built-in thermistor sensing; eliminates manual correction and supports reliable measurements from 5°C to 40°C sample temperature.
• Rugged, ergonomic handheld housing rated IP64—dust-tight and protected against water splashes—suitable for humid or washdown environments typical in beverage and dairy packaging facilities.
• Compact form factor (17 × 9 × 4 cm) and lightweight construction (300 g body weight) enable one-handed operation and portability between filling lines, sterilization stations, and QC labs.
• Low-power consumption design powered by a single 9V alkaline battery (006P type), supporting >5,000 measurements per charge under typical usage conditions.
• Optical system compliant with ISO 21748:2017 (Guidance for the use of repeatability, reproducibility and trueness estimates in measurement uncertainty evaluation) and traceable to NIST-certified refractive index standards via ATAGO’s factory calibration protocol.

Sample Compatibility & Compliance

The PR-50HO is validated exclusively for aqueous hydrogen peroxide solutions used in food-grade aseptic packaging sterilization—including those applied to carton-based liquid food containers (e.g., UHT milk, juice boxes). It is not intended for organic solvents, viscous gels, or acidic/alkaline peroxide formulations outside the specified 0.0–50.0% (w/w) range. Sample volume required is ≤0.3 mL, minimizing waste and enabling rapid turnover. All materials in contact with samples (prism surface, sample plate) are chemically resistant borosilicate glass and stainless steel—compatible with standard cleaning agents and validated for repeated exposure to ≤50% H₂O₂ at ambient temperatures. The instrument meets CE marking requirements for portable optical measuring devices and conforms to IEC 61000-4 electromagnetic compatibility standards. While not intrinsically safe for hazardous areas, its non-sparking construction and low-voltage operation support use in general-purpose industrial zones compliant with EU Machinery Directive 2006/42/EC.

Software & Data Management

As a standalone optical instrument, the PR-50HO does not incorporate onboard data logging, Bluetooth, or USB connectivity. However, it supports GLP/GMP-aligned documentation practices through its stable, repeatable analog-to-digital conversion architecture and factory-certified calibration certificate (provided with each unit, traceable to JCSS-accredited reference standards). Users may integrate measurement records into LIMS or electronic batch records via manual entry or optional third-party barcode-scanning accessories (e.g., compatible USB HID scanners). Calibration verification can be performed using certified H₂O₂ reference standards (e.g., ATAGO’s 10.0%, 30.0%, and 45.0% w/w check solutions), with results documented per ISO/IEC 17025 internal verification procedures. Audit trails for calibration and usage are maintained externally per site-specific SOPs.

Applications

• Real-time verification of H₂O₂ bath concentration prior to sterilization of paperboard packaging webs in aseptic filling lines.
• Monitoring residual H₂O₂ levels post-rinse in blow-fill-seal (BFS) and carton-forming equipment to ensure compliance with EU Regulation (EC) No 1935/2004 for food contact materials.
• QC release testing of incoming H₂O₂ stock solutions from suppliers against specification limits (e.g., 35.0 ± 1.0% w/w).
• Process troubleshooting during concentration drift events—enabling rapid identification of pump degradation, evaporation losses, or dilution errors in recirculation loops.
• Supporting validation protocols for sterilization cycles per ISO 11140-3 (Sterilization of health care products — Chemical indicators — Part 3: Class 3 indicators).

FAQ

Does the PR-50HO require periodic recalibration?
Yes—ATAGO recommends annual recalibration by an accredited service provider or in-house metrology lab using certified H₂O₂ reference standards. Field verification with check standards should be performed before each shift or batch run.
Can this refractometer measure other oxidizing agents like sodium hypochlorite or peracetic acid?
No—the optical calibration is specific to the refractive index–concentration relationship of hydrogen peroxide in water. Using it for other solutes will yield inaccurate and nontraceable results.
Is the prism surface resistant to corrosion from concentrated H₂O₂?
Yes—the sapphire-coated borosilicate glass prism is rated for continuous exposure to ≤50% (w/w) H₂O₂ at temperatures up to 40°C, per ATAGO’s material compatibility testing per ISO 10993-5 cytotoxicity guidelines.
What is the expected lifetime of the 9V battery under normal use?
Approximately 12 months with average usage of 20 measurements per day; battery life is monitored via low-power indicator icon on the LCD display.
Does the PR-50HO comply with FDA 21 CFR Part 11 requirements?
No—it is an analog-optical instrument with no electronic record generation or user authentication; however, its measurement output may be transcribed into Part 11-compliant systems following site-specific ALCOA+ data integrity controls.