QIUSUO Ammonium Ion Meter Benchtop Ion meter for NH4 with Calibration Liquids Range 0.1 to 18000 ppm Resolution 0.001,0.01,0.1,1 Automatic

QIUSUO Benchtop Ammonium Ion Meter NH4 Ion Meters with Calibration Fluid Range 0.1 to 18000 ppm Accuracy±0.5% F.S. USB Communication Interface

QIUSUO Ammonium Ion Meter NH4 Ion Concentration Meter with Standard Calibration Fluid Range 0.1 to 18000 ppm Accuracy ±1% F.S. for Testing NH3 Ion