CL-2059-01 is an chlorine sensor to measure chlorine in water by constant voltage principle,it's the measure water chlorine, chlorine dioxide, ozone. Constant voltage measurement maintains a stable electric potential at the measurement side of the electrode, different components produce different current intensity at the electric potential when measured. The micro-current measurement system consists of two platinum electrodes and a reference electrode consisting. Chlorine, chlorine dioxide , ozone will be consumed when water sample flowing through the measuring electrode, therefore, must maintain the water sample continue flow the measuring electrode.