HachHQ4200 Portable Multi-Meter, pH, Conductivity, TDS, Salinity, Dissolved Oxygen (DO), ORP, and ISE, 2 channels, w/o electrodesSKU · LEV015.53.4200A
HachHQ4300 Portable Multi-Meter, pH, Conductivity, TDS, Salinity, Dissolved Oxygen (DO), ORP, and ISE, 3 channels, w/o electrodesSKU · LEV015.53.4300A