The Apera PH700-HF (AI5013) is a laboratory-grade benchtop pH meter specifically designed for measuring strongly acidic solutions in the 0–2 pH range and solutions containing hydrofluoric acid (HF) at concentrations up to 2,000 ppm. It uses the Swiss-manufactured LabSen 833 combination pH/temperature electrode, which features a specialized HF-resistant glass membrane engineered to withstand aggressive acidic and fluoride-containing environments where standard glass electrodes can deteriorate rapidly. The meter provides ±0.01 pH accuracy, automatic temperature compensation, electrode-condition diagnostics, and storage for 50 measurement records. It is intended for specialized laboratory testing, chemical processing, and quality-control applications rather than routine nutrient-solution monitoring.
• Product Type: Benchtop laboratory pH meter kit
• Brand: Apera Instruments
• Model: PH700-HF
• SKU: AI5013
• pH Measurement Range: 0–14.00 pH; optimized for strong-acid and HF applications in the 0–2 pH range
• pH Accuracy: ±0.01 pH
• pH Resolution: Selectable 0.01 or 0.1 pH
• Included Electrode: Swiss-manufactured Apera LabSen 833 combination pH/temperature electrode
• Electrode Membrane: Specialized HF-resistant glass
• HF Concentration Limit: Up to 2,000 ppm under the product's specified operating conditions
• HF Measurement Limitation: For rated electrode life, keep contact under one minute per measurement at concentrations ≤0.1 mol/L; solutions above 0.5 mol/L are not recommended for this electrode
• Reference System: Silver-ion-trap system designed to reduce reference-junction contamination
• Reference Electrolyte: Proprietary blue gel inner reference solution that does not flow
• Temperature Compensation: Automatic (ATC), 0–100°C
• Temperature Sensor: Integrated 30 kΩ NTC thermistor
• Calibration: Automatic 1–3-point calibration
• Supported Calibration Buffers: pH 1.68, 7.00, and 10.01
• Electrode Diagnostics: Displays electrode slope and condition after calibration
• Measurement Functions: Maximum/minimum reading mode
• Data Storage: Up to 50 measurement sets
• Display: LCD with a stability indicator to identify settled readings
• Enclosure Rating: IP54 — protected against dust and incidental liquid splashes; not suitable for immersion
• Primary Applications: Strong-acid testing, HF-containing solutions, chemical processing, acid-digested samples, and specialized laboratory quality control
• Included Components: PH700-HF meter, LabSen 833 electrode, holder for up to two electrodes, and three 50 mL calibration buffers at pH 1.68, 7.00, and 10.01
• Typical Electrode Service Life: 12–24 months under normal use; actual life depends on HF concentration and contact duration
• Warranty: 2 years for the meter and 6 months for the electrode
• Replacement Electrode: LabSen 833 available separately
Key Advantage: The Apera PH700-HF combines ±0.01 pH accuracy with a specialized electrode designed to resist damage from strongly acidic and HF-containing samples. Its HF-resistant glass membrane, electrode-condition diagnostics, and onboard data storage support repeatable measurements in demanding laboratory environments. Important: Hydrofluoric acid is extremely hazardous and requires appropriate specialist handling procedures and protective measures. This meter is a measurement instrument, not a substitute for chemical safety controls. For routine nutrient solutions around pH 5.5–6.5, a standard pH meter is generally the more appropriate choice.