The Apera PH700-PW (AI5015) is a laboratory-grade benchtop pH meter specifically designed for measuring pure water and low-ionic-strength solutions with conductivity below 100 µS. It is suitable for reverse osmosis (RO), distilled, deionized, and other low-conductivity water samples where conventional pH electrodes often produce unstable readings, slow stabilization, and poor repeatability. The kit includes the Swiss-made LabSen 803 pH/temperature electrode, featuring an ultra-low-impedance L-type glass membrane, a movable sleeve junction, and a silver-ion-trap reference system. These features help stabilize measurements in low-ionic-strength samples, reduce junction clogging, and simplify electrode cleaning. The PH700 platform provides ±0.01 pH accuracy, automatic temperature compensation, electrode-condition diagnostics, and internal storage for 50 measurement sets, making it suitable for laboratory water-quality testing and quality control before nutrient preparation.
• Product Type: Benchtop laboratory pH meter kit
• Brand: Apera Instruments
• Model: PH700-PW
• SKU: AI5015
• pH Measurement Range: 0–14.00 pH
• pH Resolution: 0.01 pH
• pH Accuracy: ±0.01 pH
• Target Sample Conductivity: Below 100 µS
• Included Electrode: Swiss-made LabSen 803 pH/temperature electrode
• Electrode Membrane: Ultra-low-impedance L-type glass membrane with resistance below 50 MΩ
• Junction Design: Movable sleeve junction for electrolyte-flow adjustment and easier cleaning
• Reference System: Silver-ion-trap reference system designed to prevent junction clogging from silver sulfide precipitation
• Electrode Maintenance: Refillable electrode design
• Typical Stabilization Time: 30–60 seconds under normal conditions
• Temperature Compensation: Automatic (ATC), 0–100°C
• Temperature Sensor: Integrated thermistor positioned close to the pH membrane for faster temperature response
• Calibration: Automatic 1–3-point calibration
• Supported Calibration Buffers: pH 4.00, 7.00, and 10.01
• Electrode Diagnostics: On-screen self-diagnosis and electrode-condition display
• Measurement Functions: Maximum/minimum reading mode
• Data Storage: Up to 50 measurement sets
• Electrode Connections: BNC for pH and RCA for temperature
• Ingress Protection: IP54 — dust-protected and resistant to water splashes; not suitable for immersion
• Primary Applications: RO water, distilled water, deionized water, drinking water, well water, and storm or surface water
• Commercial Applications: Incoming-water quality control, water-treatment testing, tissue-culture laboratories, and propagation facilities
• Included Components: PH700-PW meter, LabSen 803 electrode, dual-electrode holder, and 50 mL bottles of pH 4.00, 7.00, and 10.01 calibration buffers
• Replacement Electrode: LabSen 803 available separately
• Warranty: 2 years for the meter and 6 months for the electrode
Important Limitation: This model is designed for pure water and low-ionic-strength solutions. It is not the recommended choice for nutrient-loaded reservoirs, concentrated nutrient solutions, or high-salinity samples; those applications require a more suitable electrode configuration.
Key Advantage: The Apera PH700-PW combines laboratory-grade pH measurement with an electrode specifically engineered for pure and low-conductivity water. Its low-impedance glass membrane and movable sleeve junction help reduce the measurement drift and slow stabilization commonly encountered with conventional electrodes. Automatic calibration, electrode-condition diagnostics, and 50-record storage make it a practical solution for facilities that need repeatable water-quality measurements before RO or distilled water enters a nutrient-preparation system.