Atago PAL-Hypochlorous Acid – Digital Hypochlorous Acid (HOCl) Concentration Meter

Atago PAL-Hypochlorous acid is a digital handheld instrument designed for rapid field measurement of hypochlorous acid (HOCl) concentration in aqueous disinfectant solutions. It requires significantly less sample preparation compared to classical titration methods: only 2–3 drops of sample are needed, with results delivered in approximately 3 seconds.

The instrument operates within a 50–550 ppm measurement range with approximately ±50 ppm accuracy. This performance profile is optimized for on-site process control and quick field verification rather than precision laboratory analysis. Measurement is validated exclusively for HOCl solutions in water; applicability in alternative matrices (e.g., surfaces, food products) has not been verified.

With IP65 ingress protection, the instrument withstands humid and wet working environments. It operates on 2 × AAA alkaline batteries, enabling cordless portability. Note that the device lacks automatic temperature compensation; consistent measurements are recommended at a stable reference temperature.

For operations producing or utilizing hypochlorous acid disinfectants (food safety, sanitation, water treatment), this instrument provides a practical solution for rapid on-site HOCl concentration verification.

Technical Specifications

Applications

• On-site concentration control of HOCl-based disinfectant solutions
• Rapid verification in food safety and sanitation applications
• Process monitoring in water treatment and disinfection systems