The Apera SX736 (AI468) is a professional, laboratory-grade handheld water-quality meter designed to measure multiple parameters using three interchangeable electrodes. It measures pH, dissolved oxygen (DO), electrical conductivity (EC), total dissolved solids (TDS), salinity, resistivity, and temperature, with millivolt (mV) measurement also supported. The complete kit includes a 201T-S pH/temperature electrode, a 2301T-S Brush-resistant Platinum Black (BPB) conductivity/temperature electrode, and a DO500 polarographic dissolved oxygen electrode. Automatic electrode recognition switches the meter to the appropriate measurement mode when a probe is connected, simplifying field testing across nutrient reservoirs, irrigation systems, and water sources.
The SX736 offers a wide conductivity measurement range of 0–200 mS/cm, making it suitable for testing both low-conductivity source water and nutrient solutions. Its dissolved oxygen electrode provides automatic temperature and salinity compensation, reaches 90% of its final reading within approximately 30 seconds of immersion, and requires about five minutes of polarization before measurement. The IP57-rated meter includes digital filtering, a stability indicator, and storage for up to 400 measurement records, making it suitable for routine water-quality monitoring in commercial cultivation environments.
• Product Type: Handheld multiparameter water-quality meter kit
• Brand: Apera Instruments
• Model: SX736
• SKU: AI468
• Measurement Parameters: pH, dissolved oxygen (DO), electrical conductivity (EC), TDS, salinity, resistivity, and temperature; mV measurement is also supported
• pH Measurement Range: −2.00 to 19.99 pH
• pH Accuracy: ±0.01 pH
• pH Resolution: Selectable 0.1 or 0.01 pH
• pH Calibration: Automatic 1–3-point calibration
• Included pH Electrode: Apera 201T-S pH/temperature electrode
• pH Electrode Construction: Lithium-glass membrane with a single ceramic junction
• New-Electrode Slope: ≥97%
• pH Electrode Temperature Range: 0–80°C (32–176°F)
• pH Electrode Cable: 1 meter
• Conductivity Range: 0–200 mS/cm with automatic ranging
• Included Conductivity Electrode: Apera 2301T-S BPB conductivity/temperature electrode
• Conductivity Sensor Technology: Brush-resistant Platinum Black (BPB)
• Conductivity Calibration: Single-point calibration
• Conductivity Applications: Source-water testing, nutrient-solution monitoring, and high-EC fertigation
• Included DO Electrode: Apera DO500 polarographic dissolved oxygen electrode
• DO Measurement Compensation: Automatic temperature and salinity compensation
• DO Response Time: Reaches 90% of the final reading within approximately 30 seconds of immersion
• DO Polarization Time: Approximately 5 minutes before the first measurement session
• Temperature Compensation: Automatic for pH and conductivity; the pH ATC range is 0–100°C
• Electrode Recognition: Automatically detects the connected electrode and switches to the corresponding measurement mode
• Digital Filtering: Reduces measurement noise and helps stabilize readings
• Reading Stability Indicator: On-screen indicator confirms when the reading has stabilized
• Data Storage: Up to 400 measurement records
• Water and Dust Protection: IP57-rated meter body, designed for dust-tight protection and temporary immersion up to 1 meter for 30 minutes
• Meter Dimensions: 65 × 120 × 31 mm
• Meter Weight: Approximately 180 g
• Primary Applications: Water-quality testing, source-water verification, reservoir monitoring, nutrient-solution analysis, and dissolved oxygen checks
• Suitable Growing Systems: Hydroponics, coco/perlite fertigation, deep-water culture (DWC), and recirculating hydroponic systems
• Commercial Applications: Fertigation stations, cultivation facilities, and multi-room water-quality monitoring
• Included Components: SX736 meter, 201T-S pH/temperature electrode, 2301T-S conductivity/temperature electrode, DO500 polarographic DO electrode, calibration solutions, 3M KCl storage solution, three replacement DO membrane caps, DO refill solution, and hard-shell carrying case
• Replacement Consumables: DO membrane caps, DO electrode refill solution, and electrode storage solution
• Meter Warranty: 3 years
• Electrode Warranty: 6 months
Key Advantage: The Apera SX736 combines pH, EC, and dissolved oxygen testing in one portable instrument, allowing operators to assess nutrient acidity, nutrient concentration, and water oxygenation with a single kit. Its broad conductivity range accommodates both source water and concentrated nutrient solutions, while automatic electrode recognition and the 400-record data logger simplify routine monitoring across multiple reservoirs and growing areas. The included three-electrode kit and hard-shell carrying case provide a complete solution for field-based water-quality checks.