The TCA330 is a panel mounted, ready to use Total Chlorine Analyzer. It is designed to monitor free and total chlorine in drinking water, rinse water, cooling water or other fresh water samples from 0.05-20 ppm Cl2. It features a plug and play design that incorporates a flow control device, a pH sensor, a chlorine sensor and the LXT330 controller conveniently mounted on a PVC panel.
Total Chlorine Sensor
Total Chlorine is the combined amount of free chlorine, chloramine, organic and bound chlorine in the sample. The TCA Sensor is a three electrode Amperometric sensor with a gold cathode, silver halide anode and 304 SS counter electrode. The counter electrode provides a stable base potential that minimizes drift. The TCA sensor has a microporous membrane that allows ions to diffuse in and out of the sensor. The various chlorine species in the measured solution diffuse into the sensor and react with the acidic potassium iodide electrolyte to form iodine.
The iodine is reduced at the cathode back to iodide and the current flow between the cathode and silver iodide anode is proportional to the total chlorine. The use of the pH sensor provides accurate compensation for samples between pH 4 and pH 12 and eliminates the need for an expensive sample conditioning system to control the pH of the solution. The LXT330 allows either parameter to be graphically displayed with user defined ranges allowing easy trend analysis.
Amperometric Chlorine Sensor
Amperometric Chlorine Sensors are flow sensitive, the minimum required flow by the sensor is 0.5 ft/sec, above this value the output is virtually flow independent. A “Constant head” Flow control Device (CFD) maintains the optimum flow by the sensor over a wide range of incoming sample flow rates. The minimum flow required for the CFD is 10 gas/hr and the maximum flow is 80 gal/hr with the sample going to drain at atmospheric pressure.