Carevas 5 in 1 Professional Multi-parameter Combo Testing Meter PHEC//SalinityThermometer Digital Multi-Function Tester

Easy to use, high accurancy. Quick and easy installation and operation. EC: Support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms) Built-in 3 calibration points (1413uScm 12.88ms /cm 111.8ms /cm) :1 point (6.86) or 2 point (6.86 4.00) (6.86 9.18) or 3 point (6.86 4.00 9.18) can automatically identify the calibration solution.