The Apera DO8500 (AI485) is a portable optical dissolved oxygen meter designed for hydroponics, aquaculture, and commercial water-quality monitoring. Its luminescence-based sensor measures dissolved oxygen without consuming oxygen during testing, allowing reliable readings in both still reservoirs and flowing water. Automatic compensation for temperature, salinity, and barometric pressure supports accurate measurements, while its GLP/GMP data logger stores timestamped readings for quality-control documentation.
• Brand: Apera Instruments
• Model / SKU: DO8500 / AI485
• DO Measurement Range: 0–20.00 mg/L (ppm); 0–200.0% saturation
• Accuracy: ±2% of reading or ±0.2 mg/L, whichever is greater
• Sensor Type: DO803 optical luminescence probe
• Compensation: Automatic temperature, salinity (via included conductivity probe), and barometric pressure
• Response Time: ≤30 seconds to 90% response at 25°C; stable reading typically in 1–3 minutes
• Probe Cable: 10 ft (approximately 3 m)
• Data Logging: 500 GLP/GMP records with date and time stamps; USB data export to PC using included PC-Link software
• Protection Rating: IP67 meter body
• Sensor Cap Life: More than 8,000 hours; replaceable DO8032 cap
• Power Supply: 3 AA alkaline batteries; over 200 hours of battery life without backlight
• Included Accessories: DO8500 meter, optical DO probe, conductivity/salinity probe, calibration/storage sleeve, USB cable, PC-Link software, and hard-shell carrying case
• Warranty: 3 years for meter, 2 years for probe body, and 1 year for sensor cap
Key Advantage: The DO8500 combines maintenance-light optical oxygen sensing with automatic salinity compensation and 500-record data logging. It can measure oxygen in still or flowing nutrient solutions without membrane replacement or electrolyte refills, making it useful for monitoring hydroponic reservoirs and documenting dissolved oxygen conditions across cultivation operations.