GAOTek Automatic Calibration pH Meter

This Automatic Calibration pH Meter has a temperature range of 23 ºF to 230 ºF, a pH range of -2.00 pH to 20.00 pH and an AC adapter.



  • High resolution LCD display, 5.7 in (144 mm)
  • Multi-reading feature allows auto-reading, timed-reading 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
  • 1-5 points calibration with Standard Recognition
  • Selectable pH buffer groups, including NIST, DIN, GB, USA
  • Automatic electrode diagnosis with pH slope and offset display


Technical Specification

pH Range -2.00 pH to 20.00 pH
Resolution 0.1 pH, 0.01 pH
Accuracy ±0.01 pH
Calibration Points Up to 5
Standard Customization Yes
Standard Recognition NIST, GB, USA and DIN buffers
mV Range -2000.0 mV to 2000.0 mV
Resolution 0.1 mV
Accuracy ±0.3 mV or ±0.1%
Temperature Range 23 ºF to 230 ºF (-5 ºC to 110 ºC)
Unit ºC, ºF
Resolution 0.1
Accuracy 32.36 ºF (±0.2 ºC)
Measurement Reading Mode Auto Read (Fast, Medium, Slow), Timed, Continuous
Reading Prompts Reading, Stable, Locked
Temp. Compensation ATC, MTC
Data management Data Storage 500 results each
GLP Features Yes
Inputs pH Electrode BNC(Q9)
Temp. Probe 4-pin aviation connector
Outputs USB PC
RS 232 printer
Display options Backlight Yes
Auto Shutdown 1 min to 60 min, off
IP Rating IP54
Date and Time Yes
General Power AC Adapter, 100 V to 240 V AC input, DC 9 V output
Dimensions 9.52 in x 7.67 in x 2.67 in (242 mm × 195 mm × 68 mm)
Weight 1.98 lbs. (900g)



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