... supply. 4.Message indicators Boke934 Benchtop Digital Ammonium Ion Meter Parameters: Ammonium Ion Concentration Range5*10-6~0.1mol/L(1,900~ ... Points2 to 5 points Ion Calibration Solutions 10-2,10-3,10-4,10-5,10-6 mol/L Memory99 Data sets with ... to computer.Meter Included: Ammonium Electrode (Made in US, Assembled in China),Temperature Probe, Power Adapters. Boke934 Benchtop Digital Ammonium Ion ...