This is a professional water level test instrument, the operation is simple, the appearance of fashion, small size and easy to put in your pocket.
Built-in 3 calibration points (1413uS/cm 12.88ms /cm 111.8ms /cm) PH: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.
EC: Support 3-point calibration automatic identification (1413us 12.88ms and 111.8ms)