The Apera SX716 (AI461) is a portable, laboratory-grade dissolved oxygen (DO) meter designed for accurate, on-site water-quality monitoring in commercial cultivation, aquaculture, and water-treatment environments. It measures dissolved oxygen concentration in mg/L (ppm) and percentage saturation simultaneously, alongside solution temperature. The instrument uses Apera's DO500 polarographic electrode, which integrates oxygen, temperature, and salinity sensors into a single probe connected by a 2-meter cable. The electrode requires approximately five minutes of polarization before measurement and reaches 90% of a stable reading within 30 seconds of immersion. Automatic temperature and salinity compensation help maintain measurement accuracy, while manual barometric pressure compensation allows adjustment for elevation. Its IP57-rated enclosure, 100-set data logger, and rugged carrying case make it suitable for routine dissolved oxygen checks in hydroponic reservoirs, recirculating deep-water culture (RDWC) systems, and other water-management applications.
• Product Type: Handheld dissolved oxygen meter kit
• Brand: Apera Instruments
• Model: SX716
• SKU: AI461
• Measurement Parameters: Dissolved oxygen (DO), percentage saturation, and temperature
• DO Measurement Range: 0–19.99 mg/L (ppm) / 0–200.0% saturation
• DO Accuracy: ±0.3 mg/L
• Electrode Type: DO500 polarographic electrode with integrated temperature and salinity sensors
• Electrode Cable Length: 2 m (approximately 6.6 ft)
• Electrode Polarization Time: Approximately 5 minutes before measurement
• Response Time: Reaches 90% of a stable reading within approximately 30 seconds of probe immersion
• Temperature Compensation: Automatic, 0–45°C
• Salinity Compensation: Automatic, 0–45 ppt
• Barometric Pressure Compensation: Manual adjustment, 66–200 kPa
• Calibration: Two-point calibration using air-saturated water and a zero-oxygen sodium sulfite solution
• Measurement Stability: LCD stability indicator identifies when readings have settled
• Signal Processing: Digital filtering helps reduce noise and improve response in moving or aerated water
• Data Storage: Up to 100 measurement records
• Stored Information: Reading value, unit, temperature, and serial number
• Data Recall: Stored measurements can be reviewed directly on the meter
• Water and Dust Protection: IP57-rated enclosure, designed for dust-tight protection and temporary submersion
• Power Supply: Two AA batteries
• Power-Saving Feature: Automatic shutoff
• Primary Applications: Dissolved oxygen monitoring, water-quality testing, aquaculture, and water-treatment operations
• Cultivation Applications: Hydroponic reservoirs, RDWC systems, aerated nutrient solutions, and root-zone oxygen monitoring
• Included Components: SX716 meter, DO500 polarographic electrode with 2 m cable, calibration and storage sleeve, three replacement membrane caps, electrode inner-solution refill, two AA batteries, membrane-service screwdriver, user manual, and hard-shell carrying case
• Replacement Consumables: Replaceable membrane caps and electrode inner solution
• Electrode Warranty: 6 months
• Meter Warranty: 3 years
• Certifications: CE and CMC certification
Key Advantage: The Apera SX716 combines portable dissolved oxygen measurement with automatic temperature and salinity compensation, allowing operators to check oxygen levels directly at reservoirs and water-treatment points. Its IP57-rated enclosure, replaceable membrane caps, and 100-record data logger support practical field use and routine monitoring. For commercial hydroponic operations, it provides a way to verify dissolved oxygen conditions in recirculating systems rather than relying solely on aeration equipment settings.