The Apera PH8500-PW (AI5556) is a professional handheld pH meter designed for reverse-osmosis (RO), distilled, deionized (DI), and other low-ionic-strength water sources where conventional electrodes often produce unstable readings. Its Swiss-made LabSen 803 electrode features a movable sleeve junction and low-resistance glass membrane to improve measurement stability. The meter includes GLP data logging, USB data export, and a foldable stand for benchtop use.
• Brand: Apera Instruments
• Model / SKU: PH8500-PW / AI5556
• Measurement Range: 0–14 pH
• Accuracy: ±0.01 pH
• Included Electrode: Swiss-made LabSen 803 glass pH/temperature electrode
• Electrode Features: Movable sleeve junction and glass membrane resistance below 50 MΩ
• Temperature Range: −5 to 80°C (23–176°F)
• Calibration: Automatic 1–3-point calibration; recognizes pH 1.68, 4.00, 7.00, 10.01, and 12.45
• Data Logging: 500 GLP records with manual or automatic recording
• Connectivity: USB data export via browser-based PC-Link software
• Protection Rating: IP57
• Power: 3 × AA batteries
• Warranty: 3 years for the meter; 6 months for the electrode
Key Advantage: The PH8500-PW is purpose-built for purified and low-ion water, combining a specialized electrode for more stable readings with GLP records and USB export for documented water-quality checks.