Freshwater Alkalinity Checker® HC - HI775 The Hanna Freshwater Alkalinity Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector to precisely determine... more info

Marine phosphate - ultra low range Checker HC® colorimeter: Range 0.00 to 0.60 ppm The Hanna Phosphate Ultra Low Range (0.00 to 0.90 ppm) Checker®  bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light... more info

Marine Alkalinity (dKH) Checker® HC The Hanna Marine Alkalinity (dKH) Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing... more info

Chlorine Checker, Ultra High Range (0-500 ppm) The Hanna Total Chlorine Ultra High Range Checker®  bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter... more info

Marine Nitrite low range Checker HC: Range 0 to 999 ppb The Hanna Marine Low Range Nitrite Checker® bridges the gap between simple chemical test kits and professional instrumentation. Don't let measurement accuracy depend on visual interpretation. Use the Hanna Marine Nitrite Checker® with a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable... more info

Marine Nitrite low range Checker HC: Range 0 to 999 ppb The Hanna Marine Low Range Nitrite Checker® bridges the gap between simple chemical test kits and professional instrumentation. Don't let measurement accuracy depend on visual interpretation. Use the Hanna Marine Nitrite Checker® with a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable... more info

Nitrite ultra low range Checker HC®: Range 0 to 200 ppb The Hanna Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits are not very accurate and only give 5 to 10 points resolution while professional instrumentation can cost hundreds of dollars and can be time-consuming to calibrate and maintain. The Checker® is both accurate and affordable. Compact,... more info

  Free Chlorine Ultra Low-Range Checker HC- HI-762 The Hanna Free Chlorine Ultra Low-Range Checker® bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector... more info

Total Chlorine Checker Ultra Low Range (0 to 500 ppb) The Hanna Total Chlorine Ultra Low-Range Checker®  bridges the gap between simple chemical test kits and professional instrumentation. Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in color. Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a... more info