GAOTek High Resolution Portable Water Test Ion Nitrate Meter Tester




  • High resolution LCD display, 5.7 in (259 mm)
  • Multi-reading feature allows auto reading, timed-read and continuous-read
  • Automatic/Manual temperature compensation ensures accurate results
  • Auto hold features senses and locks the measurement endpoint
  • Data Storage 500 sets (GLP-compliant)
  • Support for USB or RS-232 communication
  • The reset feature automatically resumes all settings back to factory default options
  • IP54 waterproof
  • 1 to 5 points calibrations with Standard Recognition
  • Selectable pH buffer groups, including NIST, DIN, GB, USA
  • Automatic electrode diagnosis with pH slope and offset display
  • 1 to 5 points calibrations
  • Selectable measurement unit, including μg/L, mg/L, g/L, mmol/L, px, ppm, ppb, etc.
  • Multi-measurement modes are supported, including Direct Reading mode
  • Over 10 methods are built-in, including F-, Cl-, Br-, I-, NO3-, BF4-, NH4+, K+, Na+, Ca2+, Cu2+, Pb2+, Ag+ etc.


Technical Specifications

Test parameters pH / ISE / Temp (mV / px)
pH RangeResolution


Calibration Points

-2.000 pH to 20.000 pH0.1 pH, 0.01 pH, 0.001 pH

±0.002 pH

Up to 5

mV RangeResolution


-2000.00 mV to 2000.00 mV0.1 mV, 0.01 mV

±0.1 mV or ±0.03% of reading whichever is greater

Px RangeResolution


Calibration Points

-2.000 px to 20.000 px0.1 px, 0.01 px, 0.001 px

±0.002 px

Up to 5

ISE RangeUnit



Calibration Points

1.000e-9 to 9.999e+9mol/L, mmol/L, g/L, mg/L, μg/L, ppm, ppb

Up to 4 significant digits


Up to 5

Temperature RangeUnit






-14 ºF to 275 ºF (10 to 135 ºC)ºC, ºF


±0.1 ºC

AC Adapter, 100-240 V AC input, DC 9 V output

6.69 in x 3.35 in x 1.18 in (242 mm x 195 mm x 68 mm)

1.98 lb (0.9 kg)


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