Determines free, combined or total chlorine residuals as well as residual bromine, iodine, ozone, permanganate or chlorine dioxide. An internally mounted switch is used to select normal sensitivity range of 1 to 10 ppm, or high sensitivity range of down to 5 ppb (0.005 mg/L) Cl2. The working pipet is filled from an internal one-pint collapsible bag containing 0.00564N phenyl arsine oxide titrant. Current flow between electrodes is indicated on millimeter on front panel of titrated. Uses platinum sensing electrode and copper reference electrode.
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