| Measuring Range | (0 to 19.99) mg/L (ppm); (0 to 200.0) %.; (-2.00 to 19.99) pH; Conductivity: (0.00 to 19.99) μS/cm, (20.0 to 199.9) μS/cm (200 to 1999) μS/cm, (2.00 to 19.99) mS/cm (20.0 to 199.9) mS/cm TDS: (0 to 100) g/L; Salinity: (0 to 100) ppt Resistivity: (0 to 100) MΩ·cm |
|---|---|
| Resolution | 0.1/0.01 mg/L (ppm); 1/0.1 %; 0.1/0.01 pH; 0.01/0.1/1 μS/cm; 0.01/0.1 mS/cm; 1 mV |
| Accuracy | ±0.30 mg/L (ppm), incl. Electrode error; Instrument: ±0.01 pH; Total: ±0.02 pH; Device: ±1.0 F.S, Total: ±1.5% F.S; Device: ±0.1% FS, Total: ±15 mV |
| Response Time | ≤ 30s (90% response at 25°C) |
| Air Pressure Compensation | (66 to 200) kPa (manual) |
| Automatic Calibration | Air saturated with water; water saturated with air |
| Data Storage | 400 data sets |
| Dimensions & Weight | Meter: (65×120×31) mm/180 g Complete set: (255×210×50) mm/1760 g |
| Electrode Constant | 0.1 / 1 / 10 cm-1 |
| Electrode Type | Polarographic |
| Input Current | ≤2×10-12 A |
| Input Impedance | ≥1×1012Ω |
| IP Rating | IP57 |
| Measuring Range (mV/ORP/EH) | -1999mV to 0 to 1999mV |
| Memory Values | Serial number, measured value, measuring unit and temperature |
| Quality and safety certification | CE, ISO 9001:2015 |
| Reference Temperature | 25°C, 20°C, and 18°C |
| Salinity compensation range | (0 to 45) ppt (automatic) |
| Stability | ±0.01 pH/3h |
| Temperature Compensation | (0 to 100) °C (automatic); (0 to 50) °C (automatic); (0 to 45) °C (automatic) |
| Power Supply | 2 AA batteries (1.5V x2) |
| Manufacturer | Apera Instruments |
| MPN | AI469 |
| Item number | AI469 |
The Apera Instruments SX751 is a versatile, portable multi-parameter meter designed for laboratory-quality measurements of pH, dissolved oxygen (DO), redox potential (ORP), conductivity (EC), TDS, salinity, and resistivity in general water solutions. Its rugged, dust- and water-resistant (IP57) design makes it ideal for use in harsh field environments.
The SX751 includes a memory function capable of storing up to 400 data sets, which can be easily retrieved for analysis. Its accurate and fast measurements are made possible by high-quality electrodes, such as the 201T-S pH/Temp. electrode with lithium glass membrane, the 2301T-S BPB conductivity electrode, and the DO500 polarographic DO electrode, each providing reliable, fast results.
For DO measurements, the DO500 electrode is polarized within just 5 minutes, and the integrated automatic temperature and salinity compensation ensures precise results. The 301Pt-S ORP electrode, with its high-quality platinum sensor, provides accurate ORP measurements without the need for calibration.
Key Features
- Multi-parameter measurement – pH, DO, ORP, EC, TDS, salinity, resistivity
- Fast and accurate readings – Integrated digital filter technology for enhanced precision
- Memory function – Stores up to 400 data sets
- Field-ready design – IP57 dust and water resistance
- Replaceable electrodes – Includes 3 replacement membrane caps for the DO500 electrode
- Calibration made easy – Quick 1-3 point pH calibration and 1-point EC calibration
- Complete test kit – Supplied with all necessary accessories in a rugged carrying case
- 3-year manufacturer’s warranty (6 months for electrodes)
Complete Set Includes
SX751 portable pH/DO/ORP/EC/TDS/salinity/resistivity meter
201T-S pH/Temp. electrode
301Pt-S ORP electrode
2301T-S conductivity/Temp. electrode
DO500 polarographic DO electrode
Calibration solutions: pH 4.00, pH 7.00, pH 10.01 (50 ml each)
1413 μS Conductivity calibration solution
DO502 electrolyte solution for refilling
3x DO503 membrane caps
Polishing paper for electrode cleaning
Manual
2x AA batteries
Screwdriver
Robust carrying case
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