Coagulant Charge Analyzer measures the colloidal charge of a solution. A coagulant charge analyzer is needed to determine the efficiency of the coagulation by measuring the residual colloid charge. It uses a fast, simple titration procedure to correlate jar with a quantified, repeatable charge value resulting in optimized plant performance. Once this correlation is established, jar tests usually become less frequent, or unnecessary. The measurement cell consists of a reciprocating piston in a probe assembly. The movement of liquid between two stainless steel electrodes creates a voltage signal indicating net charge of the sample. This signal is displayed in a range of -10.00 to + 10.00. When the desired plant results are obtained, this number is defined as the optimum charge value.