The Apera PH700-SA (AI5011) is a laboratory-grade benchtop pH meter specifically designed for measuring strongly alkaline solutions with pH values above 12 and high-salinity solutions exceeding 5,000 ppm. It uses the Swiss-engineered LabSen 843 combination pH/temperature electrode, featuring a specialized HA-type glass membrane designed to minimize sodium-ion interference, a common cause of inaccurate readings in strongly alkaline samples. Its proprietary blue gel reference electrolyte does not flow, helping prevent air-bubble formation and allowing stable measurements in different electrode orientations. A built-in silver-ion trap helps prevent reference-junction clogging and extends electrode service life. The PH700 platform provides ±0.01 pH accuracy, automatic temperature compensation from 0–100°C, electrode-condition diagnostics, and onboard storage for 50 measurement sets.
• Product Type: Benchtop laboratory pH meter kit
• Brand: Apera Instruments
• Model: PH700-SA
• SKU: AI5011
• pH Measurement Range: 0–14.00 pH
• pH Resolution: 0.01 pH
• pH Accuracy: ±0.01 pH
• Target Sample Types: Strong alkaline solutions (pH above 12), high-salinity solutions exceeding 5,000 ppm, and general water-based solutions
• Included Electrode: Swiss-engineered LabSen 843 combination pH/temperature electrode
• Electrode Membrane: HA-type glass designed to minimize sodium-ion interference in strongly alkaline samples
• Reference Electrolyte: Non-flowing blue gel electrolyte designed to prevent internal air-bubble formation
• Reference System: Built-in silver-ion trap to help prevent junction clogging
• Temperature Compensation: Automatic (ATC), 0–100°C
• Calibration: Automatic 1–3-point calibration
• Supported Calibration Buffers: pH 4.00, 7.00, and 12.45
• Electrode Diagnostics: Self-diagnosis and electrode-condition display
• Measurement Functions: Maximum/minimum reading mode for monitoring pH variations
• Data Storage: Up to 50 measurement sets
• Enclosure Rating: IP54 — protected against dust and water splashes; not suitable for immersion
• Primary Applications: Strong alkaline solutions, high-salinity samples, laboratory water testing, and chemical quality control
• Cultivation Applications: Nutrient-solution testing, concentrated stock-solution checks, alkaline cleaning solutions, and reservoir pH monitoring
• Included Accessories: LabSen 843 electrode, dual-electrode holder, and three 50 mL premixed calibration solutions at pH 4.00, 7.00, and 12.45
• Replacement Electrode: LabSen 843 available separately
• Warranty: 2 years for the meter and 6 months for the electrode
Key Advantage: The Apera PH700-SA combines precise pH measurement with an electrode specifically engineered for strongly alkaline and high-salinity solutions. Its HA-type glass membrane helps reduce sodium-ion measurement errors, while the silver-ion trap and non-flowing gel electrolyte support stable readings and reduce maintenance. The included pH 12.45 calibration buffer is particularly useful for validating electrode performance in alkaline applications. It can also handle routine water-based nutrient-solution testing, making it a versatile option for facilities that work with both standard and challenging chemical samples.