QIUSUO Bromide Ion Meter Portable Br Ion Meter with Range 0.4 to 81000 ppm Accuracy ±0.5% F.S. Calibration Fluid 2 to 5 Points Calibration for Testing Br Ion

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

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 Chlorine Ion Meter with Calibration Fluid Range 1 to 35000 ppm 2 to 5 Points Calibration Accuracy ±0.5% F.S.