The Apera PH8500-HF (AI5525) is a professional handheld pH meter designed for strong-acid and hydrofluoric acid (HF) solutions. It includes the Swiss-made LabSen 833 refillable pH/temperature electrode, featuring an HF-resistant glass membrane and a Silver Ion Trap reference system to help prevent junction clogging. Its IP57-rated body, GLP data logging, and USB export support reliable measurements and documented quality control in laboratory and industrial environments.
• Brand: Apera Instruments
• Model / SKU: PH8500-HF / AI5525
• pH Range / Accuracy: 0–14 pH / ±0.01 pH
• Included Electrode: Swiss LabSen 833 refillable pH/temperature combination electrode
• Electrode Features: HF-resistant glass membrane, Silver Ion Trap reference system, and non-flowing blue gel electrolyte
• Temperature Range: −5 to 100°C (23–212°F)
• Calibration: Automatic 1–3-point calibration; recognizes up to 12 buffer types
• Data Storage: 500 GLP records with manual or automatic logging
• Connectivity: USB data export through browser-based PC-Link software
• Protection Rating: IP57
• Power: AA batteries; foldable stand for benchtop use
• Warranty: 3 years for the meter; 6 months for the electrode
Key Advantage: The PH8500-HF combines specialized electrode protection for strong-acid measurements with 500 timestamped records and USB export. HF limitation: The manufacturer rates the electrode for approximately 1,000 measurements in HF solutions at concentrations up to 0.1 mol/L (0.2% by weight), with each measurement lasting less than one minute. Hydrofluoric acid requires specialist handling and strict safety controls.