PHB-51 Intelligent Touchscreen Portable pH Meter

The Metalsin PHB-51 is the most advanced portable pH meter in our lineup, designed for professionals who refuse to compromise on precision when leaving the laboratory. Engineered for the rigorous demands of potable water, raw water, wastewater, and reclaimed water systems, this device combines a smartphone-like user experience with the ruggedness required for field-based analysis.

PHB-51 portable pH meter with intelligent management system & touchscreen. The meter is furnished with standard buffers, a silicone rubber case, a wristband, and a carrying case.

Intuitive Interface & Global Calibration Standards

The PHB-51 features a stunning 4.3-inch high-contrast color LCD touchscreen, providing crystal-clear visibility and effortless navigation in any outdoor lighting. This professional-grade instrument supports an exhaustive 1-8 points of calibration, ensuring a high-accuracy linear curve across the entire pH spectrum. With automatic recognition for all major global buffer groups—including USA, NIST, DIN, GB, MERCK, and JIS—technicians can switch between international protocols with a single touch, ensuring compliance regardless of the project’s location or industry standards.

Intelligent Management & Regulatory Accountability

Beyond mere measurement, the PHB-51 operates on a sophisticated Intelligent Operating System that brings laboratory-level administration to the field. This suite includes comprehensive modules for user management (secure access), calibration and electrode management (tracking sensor health), and method management (standardizing SOPs). The integrated Log Management system captures every operational step, creating a transparent audit trail. This level of oversight is critical for regulated wastewater treatment and reclaimed water systems, where data integrity and accountability are paramount.

Rugged Versatility & Data Analytics

Housed in an IP65 waterproof chassis, the PHB-51 is built for the elements. It features a multi-reading system (auto-read, timed-read, and continuous-read) with an auto-hold function that intelligently locks measurement endpoints. Data integrity is guaranteed by automatic/manual temperature compensation and electrode diagnosis, which displays pH slope and offset values to monitor sensor life. For high-volume projects, it stores 1,000 GLP-compliant data sets per parameter, complemented by a data analysis feature for on-site reviews, comparisons, and recalculations. With USB communication, support for user-defined buffers, and an auto-power off function to preserve battery life, the PHB-51 is the ultimate workstation for modern field scientists.

Technical Parameter & Operation Manual