8-in-1 Portable PH/DO/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Meter Kit
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8-in-1 Portable PH/DO/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Meter Kit

Model: SX-751

TOP INSTRUMENT 8-in-1 Portable pH/DO/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Meter Kit is designed for lab-grade measurement of up to 8 water quality parameters in the field, including pH, ORP (redox), DO (dissolved oxygen), conductivity, TDS, salinity, and resistivity. It is suitable for general water solutions’ applications such as water treatment, groundwater, surface water, hydroponics, environmental monitoring, aquaculture, aquarium, beverage making, etc.
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  • SX-751

  • TOP


  • Intelligent functions –– auto. calibration, auto. temperature compensation, self-diagnosis, data logging, auto. power off, and more.

  • Digital filter technology –– enhance the meter’s response time and measurement accuracy.

  • Automatic electrode recognition –– the meter automatically switches to the right parameter mode according to the connected electrode.

  • Data logging –– 400 sets of data storage and recall.

  • Built tough –– IP57 water-resistant structure, ideal for use in harsh environment.

PH Electrode

The 201T-S pH/temp. electrode is featured with fast response and high accuracy. This electrode is suitable for general water solutions’ pH testing. A 3M KCL storage bottle comes with the electrode to keep its sensitivity.

Measurement Range0 to 14 pH, 0 to 80˚C (32 to 176˚F)
JunctionSingle ceramic
Cable length1 meter
Temperature sensor30K Thermistor
Slope≥97% in new condition

DO Electrode

Top's proprietary 3-in-1 polarographic DO electrode enables automatic compensation for temperature and salinity, minimizing, DO measurement error. And the electrode polarization takes only 5 minutes vs. industry average 30 minutes.

Measurement Range0-20.00mg/L
Cable length2 meters
Temperature unit30KΩ Thermistor

Conductivity Electrode

2301T-S Conductivity Electrode (K=1.0) is featured with a proprietary platinum black sensor for accurate readings in a wide conductivity range up to 200 mS/cm, along with a built-in temperature sensor for automatic temperature compensation.

Measurement Range0 to 200 mS/cm ( 0 to 200,000 µS/cm), 32 to 122°F (0 to 50°C)
Cable length1 meter
Temperature sensor30KΩ thermistor

ORP Electrode

301Pt-S ORP Electrode is featured with a proprietary platinum ring ORP sensor for fast and stable readings. This electrode is designed for testing in general water solutions both in-lab or in-field.

Measurement Range-1999 to 1999 mV
JunctionSingle Ceramic
Reference ElectrodeAg/AgCl
Cable length1 meter
PH CalibrationThis meter can adopt 1 to 3 point automatic calibration, automatically recognizing 1.68, 4.00, 7.00, 9.18, 12.45. 3 bottled pH buffers are included (pH 4, 7, 10)
Conductivity CalibrationA unique one-point automatic calibration function at 1413µS covering a wide measurement range of 0 to 200 mS/cm (200,000µS/cm) .
DO CalibrationEasy calibration for saturated oxygen with the help of the calibration sleeve. Zero-oxygen calibration is also available.
Complete KitAll the necessary buffers and accessories are included in the rugged carrying case.

To Make The World Closer To The Truth
ZHEJIANG TOP INSTRUMENT CO.,LTD., as a subsidiary of TOP Cloud agri, is a high-tech enterprise specializing in the R&D, manufacturing, sales for laboratory equipments, and provision of comprehensive laboratory solutions.


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