PXS-215 Ion Meter It uses blue backlight, double row digital display LCD, can display the pX value and value. ... aqueous sodium ion concentration.Main features:It uses blue backlight, double row digital display LCD, can display the pX value and value ... .Technical parameters:Measuring scope: pX ± 1 or 2: (0.00~14.00)pXThe mV (- 1800-1800) mVResolution: 0 ...