PH-903 Pen pH Tester WR PH-903 Pen pH Tester WR (New) Range: 0.00-f-¼14.00 pH, Resolution: 0.01 pH, Accuracy: -f+ú-f+¦0.03pH, Temp. C: 5-f-¼50-f+¬, (ATC) Calibration: Two-point at 6.86pH and 4.01pH (or 7.0pH and 4.01pH) Features: Automatic switch-off function: After 10 minutes without pushing buttons, the meter will be switched off automatically. Low battery: As long as there is any display, the accuracy is guaranteed. Battery Life: DC 4x 1.5V Flug: Fixed electrode 0
