The Apera PH820 (AI531) is a high-precision, laboratory-grade benchtop pH meter designed for commercial cultivation facilities and laboratories that require accurate, repeatable, and traceable pH measurements. It delivers an accuracy of ±0.002 pH ±1 digit and includes a Swiss-made LabSen® 211 combination pH electrode featuring an impact-resistant, bubble-free sensor tip and a long-life reference system. A dedicated MP500 temperature probe enables simultaneous pH and temperature measurement. The meter supports automatic 1–5-point calibration, electrode-condition diagnostics, and calibration reminders to help maintain measurement reliability. Its Good Laboratory Practice (GLP) data-management system stores up to 500 timestamped measurement records, which can be exported through USB for spreadsheet analysis and quality-control documentation. An ORP measurement mode is also available with a compatible electrode sold separately.
• Product Type: High-precision benchtop pH meter kit
• Brand: Apera Instruments
• Model: PH820
• SKU: AI531
• pH Measurement Range: −2.00 to 16.00 pH
• pH Accuracy: ±0.002 pH ±1 digit
• pH Resolution: 0.001 pH
• Included pH Electrode: Swiss-made LabSen® 211 combination pH electrode
• Electrode Design: Impact-resistant, bubble-free sensor tip designed to minimize air-bubble interference
• Reference System: Long-life reference system designed to support stable measurements
• TRIS Buffer Compatibility: Compatible with TRIS buffer for specialized biological assays
• Temperature Probe: Dedicated MP500 temperature probe
• Calibration: Automatic 1–5-point calibration
• Supported Calibration Buffers: pH 1.68, 4.00, 7.00, 10.01, and 12.45
• Electrode Diagnostics: Monitors electrode slope and displays electrode-condition information
• Calibration Reminders: Prompts users when recalibration is due
• Data Storage: Up to 500 GLP measurement records, including date, time, measurement value, unit, and temperature
• Data Export: USB connectivity for exporting stored measurement data to a connected PC
• ORP Measurement: Supported with a compatible ORP electrode, sold separately
• Display: Large backlit LCD with simultaneous pH and temperature readings, stability indicators, and calibration-status information
• Ingress Protection: IP54 — resistant to dust and water splashes; not suitable for immersion
• Power Supply: Included DC 9V power adapter
• Connectivity Ports: pH/mV, reference (REF), temperature (TEMP), RS232, and DC 9V input
• Primary Applications: Nutrient-solution testing, irrigation-water analysis, laboratory pH measurement, and production quality control
• Cultivation Applications: Nutrient mixing stations, reservoir checks, coco and rockwool cultivation, recirculating hydroponics, and incoming-water verification
• Quality-Control Documentation: GLP records support traceable nutrient-batch testing and water-quality monitoring
• Manufacturing Quality System: Apera products are manufactured under an ISO 9001:2015-certified quality system.
Key Advantage: The Apera PH820 combines exceptional ±0.002 pH accuracy with GLP data storage for up to 500 measurement records and USB data export. Its electrode-health monitoring and calibration reminders help identify declining probe performance before it compromises measurement reliability. These capabilities make it particularly valuable for commercial cultivation facilities that require precise nutrient-batch verification, consistent pH control, and documented quality-control records.