Return of spots or film on dishes and glassware

10 ml level mark for adding correct volume

Properly storing your pH electrode in a solution keeps the glass membrane well hydrated which maintains proper function and provides accurate readings

Internal clock with timestamp for all logged data

Hanna HI707 Nitrite Checker | Low Range Digital Colorimeter 0-0.35 mg/L whole house filter with cartridge Return of spots or filmProfessional Low Range Nitrite Colorimeter for Aquariums, Pools & Drinking Water The Hanna HI707 Checker HC is a portable, professional grade low range nitrite colorimeter designed for accurate nitrite (NO N) measurement from 0. 00 to 0. 35 mg L in aquariums, swimming pools, drinking water, and water quality applications. This handheld photometer delivers lab quality results in the field with simple operationjust add reagent, insert the cuvette, and