{"product_id":"apera-sx731-7-in-1-portable-phorpconductivitytdssalinityresistivity-meter-kit","title":"Apera SX731 7-in-1 Portable pH\/ORP\/Conductivity\/TDS\/Salinity\/Resistivity Meter Kit","description":"\u003cp\u003eThe Apera SX731 (AI467) is a professional 7-in-1 handheld water-quality meter designed for commercial cultivation, hydroponics, fertigation, and water-treatment applications. Using three interchangeable electrodes, it measures pH, oxidation-reduction potential (ORP), electrical conductivity (EC), total dissolved solids (TDS), salinity, resistivity, and temperature. The complete kit includes a 201T-S pH\/temperature electrode, a 301Pt-S platinum ORP electrode, and a 2301T-S Brush-resistant Platinum Black (BPB) conductivity\/temperature electrode.\u003c\/p\u003e\n\n\n\u003cp\u003eThe SX731 is designed for field use, with an IP57-rated housing, automatic electrode recognition, digital filtering, and onboard storage for up to 400 measurement records. Its wide conductivity range of 0–200 mS\/cm accommodates both low-conductivity reverse-osmosis (RO) water and concentrated nutrient solutions. Automatic temperature compensation supports consistent readings, while the dedicated ORP electrode enables monitoring of oxidation-reduction potential in water-treatment and sanitation programs. The kit also includes calibration solutions and a rugged carrying case for convenient transport between testing locations.\u003c\/p\u003e\n\n\n\u003cp\u003e• Product Type: Handheld multiparameter water-quality meter kit\u003cbr\u003e\n• Brand: Apera Instruments\u003cbr\u003e\n• Model: SX731\u003cbr\u003e\n• SKU: AI467\u003cbr\u003e\n• Measurement Parameters: pH, ORP (mV\/EH), EC, TDS, salinity, resistivity, and temperature\u003cbr\u003e\n• pH Measurement Range: 0.00–14.00 pH\u003cbr\u003e\n• pH Accuracy: ±0.01 pH\u003cbr\u003e\n• ORP Measurement Range: −1999 to +1999 mV\u003cbr\u003e\n• ORP Accuracy: ±0.1% full scale for the meter; ±15 mV overall system accuracy\u003cbr\u003e\n• Conductivity Range: 0.00 µS\/cm to 200 mS\/cm (200,000 µS\/cm)\u003cbr\u003e\n• Conductivity Accuracy: ±1% of full scale\u003cbr\u003e\n• Temperature Compensation: Automatic (ATC), 0–50°C\u003cbr\u003e\n• Included pH Electrode: 201T-S combination pH\/temperature electrode\u003cbr\u003e\n• pH Electrode Construction: Lithium-glass membrane, single ceramic junction, and integrated temperature sensor\u003cbr\u003e\n• pH Electrode Operating Range: 0–14 pH; 0–80°C\u003cbr\u003e\n• Included ORP Electrode: 301Pt-S platinum-ring ORP electrode\u003cbr\u003e\n• ORP Reference System: Ag\/AgCl reference with a single ceramic junction\u003cbr\u003e\n• Included Conductivity Electrode: 2301T-S conductivity\/temperature electrode\u003cbr\u003e\n• Conductivity Sensor Technology: Brush-resistant Platinum Black (BPB)\u003cbr\u003e\n• Conductivity Cell Constant: K = 1.0\u003cbr\u003e\n• Electrode Recognition: Automatically detects the connected electrode and selects the appropriate measurement mode\u003cbr\u003e\n• pH Calibration: Automatic 1–3-point calibration with recognition of U.S., NIST, and Chinese buffer series\u003cbr\u003e\n• Conductivity Calibration: Automatic one-point calibration using a recognized conductivity standard\u003cbr\u003e\n• ORP Calibration: No meter-level calibration required; proper electrode conditioning is necessary\u003cbr\u003e\n• Low-Conductivity Measurement: Nonlinear automatic temperature compensation activates below 10 µS\/cm to support measurements in near-pure and RO water\u003cbr\u003e\n• Data Storage: Up to 400 measurement records\u003cbr\u003e\n• Data Recall: Stored readings can be reviewed directly on the meter\u003cbr\u003e\n• Digital Filtering: Helps improve measurement stability and reduce noise in field conditions\u003cbr\u003e\n• Additional Functions: Electrode self-diagnosis and automatic power-off\u003cbr\u003e\n• Water and Dust Protection: IP57-rated housing, designed for dust-tight protection and temporary immersion\u003cbr\u003e\n• Included Calibration Solutions: pH 4.00, 7.00, and 10.00 buffers, plus a 1,413 µS\/cm conductivity standard\u003cbr\u003e\n• Other Included Accessories: Three electrodes, rugged carrying case, and supporting electrode-care accessories\u003cbr\u003e\n• Primary Applications: Nutrient-solution testing, source-water verification, reservoir monitoring, runoff analysis, and water-treatment checks\u003cbr\u003e\n• ORP Applications: Evaluating oxidizing capacity in sanitation and water-treatment solutions using peroxide-, chlorine-, or ozone-based treatments\u003cbr\u003e\n• Suitable Growing Systems: Hydroponics, coco coir, deep-water culture (DWC), and recirculating hydroponic systems\u003cbr\u003e\n• Warranty: 3 years for the meter and 6 months for the electrodes\u003cbr\u003e\n• Important Limitation: The included conductivity electrode measures up to 200 mS\/cm.\u003c\/p\u003e\n\n\n\u003cp\u003eKey Advantage: The Apera SX731 combines pH, ORP, and conductivity testing with TDS, salinity, resistivity, and temperature measurement in one portable kit. Its broad conductivity range allows operators to test both low-conductivity source water and concentrated nutrient solutions without changing conductivity probes. Automatic electrode recognition simplifies switching between measurement types, while IP57 protection and 400-record data storage make it practical for routine quality-control checks across multiple reservoirs and cultivation areas.\u003c\/p\u003e","brand":"Hydro Supply Co.","offers":[{"title":"Default Title","offer_id":68104531574820,"sku":"APRA-AI467","price":482.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0254\/3914\/1924\/files\/handheld-ph-orp-conductivity-tds-salinity-resistivity-multiparameter-m.jpg?v=1794499876","url":"https:\/\/www.growitdepot.com\/products\/apera-sx731-7-in-1-portable-phorpconductivitytdssalinityresistivity-meter-kit","provider":"Grow It Depot","version":"1.0","type":"link"}