The Apera PH8500-SA (AI5523) is a professional handheld pH meter designed for strongly alkaline solutions (pH 10–14) and high-salinity samples exceeding 5,000 ppm. It features the Swiss-made LabSen 843 refillable electrode with a specialized HA-type glass membrane that minimizes sodium-ion interference and alkaline measurement errors. Its Silver Ion Trap reference system helps prevent junction clogging, while Bluetooth-free USB data logging supports documented laboratory and commercial quality-control procedures.
• Brand: Apera Instruments
• Model / SKU: PH8500-SA / AI5523
• pH Range / Accuracy: −2.00 to 16.00 pH / ±0.01 pH
• Target Solutions: Strong alkaline (pH 10–14) and high-salinity solutions (above 5,000 ppm)
• Included Electrode: Swiss LabSen 843 refillable pH/temperature electrode
• Electrode Features: HA-type glass membrane, blue gel electrolyte, and Silver Ion Trap reference system
• Temperature Compensation: Automatic or manual, 0–100°C
• Calibration: Automatic 1–3-point calibration; recognizes five standard buffers (pH 1.68, 4.00, 7.00, 10.01, and 12.45)
• Data Storage: 500 GLP records with manual or automatic logging
• Connectivity: USB data export through browser-based software (Chrome, Edge, or Firefox)
• Protection Rating: IP57 — waterproof and dustproof
• Additional Features: Foldable benchtop stand, silicone grip case, electrode diagnostics, and calibration reminders.
Key Advantage: Its specialized HA glass electrode minimizes alkaline measurement errors in high-pH and high-salinity solutions. The refillable design, 500-record GLP storage, and USB reporting make it suitable for demanding commercial water-quality and fertigation monitoring.