SX751 8-in-1 Portable pH/Temperature Meter Kit



  •  Built-in microprocessor chip with the intelligent functions of auto. calibration, auto. temperature
    compensation, auto. salinity compensation, manual baromatric pressure compensation, data storage,
    function settings, auto. power off, and low voltage display etc.
  •  Adopts digital filter technology to intelligently improve meter’s response speed and accuracy. The
    smiley face icon will appear when the reading is stable.
  • Pure water modes available for pH and conductivity, significantly increasing the accuracy.
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Apera SX751 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.

Basic features of SX751

  •  Unique 1-point conductivity calibration covering a wide range of 0 to 200mS, easy to use.
  •  The polarographic DO electrode has a special electrode calibration sleeve. The electrode polarization
    only takes 5 minutes. Electrode adopts a combo-style membrane cap, which is very convenient to use.
    Each DO electrode comes with three backup membrane caps.
  •  Meter’s LCD screen has clear and bright backlit display.
  • Built-tough. IP57 waterproof and dust-proof.


We warrant this instrument to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS, LLC for a period of THREE YEARS for the instrument and SIX MONTHS for the probe from the delivery.

This limited warranty does NOT cover any issues due to:

  • Accidental damage
  • Improper use
  • Normal wear and tear
  • Transportation
  • Storage
  • Failure to follow the product instructions
  • Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
  • Unauthorized repair
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pH Measurement range: (-2.00 to 19.99) pH
Resolution: 0.1/0.01 pH
Accuracy: Meter: ±0.01pH; Overall: ±0.02pH
Input current: ≤2×10-12 A
Input impendance: ≥1×1012 Ω
Stability: ±0.01 pH/3h
Temp. compensation range: (0 to 100) °C (automatic)
ORP(mV) Measurement range (mV/ORP/EH): -1999 mV to 0 to 1999mV
Resolution: 1mV
Accuracy: Meter: ±0.1% FS, Overall: ±15mV
Conductivity Measurement range:
(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: 0.01/0.1/1μS/cm 0.01/0.1 mS/cm
Accuracy: Meter: ±1.0% F.S, Overall:±1.5% F.S
Temp. compensation range: (0 to 50) °C (automatic)
Electrode constant: 0.1 / 1 / 10 cm-1
Reference temperature: 25°C, 20°C, and 18°C
Dissolved Oxygen Measurement range: (0 to 19.99) mg/L (ppm); (0 to 200.0) %
Resolution: 0.1/0.01 mg/L (ppm) 1/0.1%
Accuracy: ±0.30 mg/L (ppm), including electrode error
Response time: ≤30s (25°C, 90% response)
Temp. compensation range: (0 to 45) °C (automatic)
Salinity compensation range: (0 to 45) ppt (automatic)
Barometric pressure compensation range: (66 to 200) kPa (manual)
Automatic calibration: Air saturated by water; water saturated by air
Electrode type: Polarographic

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SX751 8-in-1 Portable pH/Temperature Meter Kit

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