With two points calibration function, it will prompt pH calibration solution when you calibrate the meter.
You need only immerse the pH electrode into standard solution and press [CAL] key, then the meter will be calibrated automatically.
When measure the sample solution, you need freeze reading temporarily for ease of recording.
Waiting for a stable reading, press [HOLD] key, then the meter will hold the value.
pH Range: 0.0-14pH Accuracy: 0.1pH