Model 450 Free Residual Chlorine Sensor

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ELIMINATES WET CHEMICAL ANALYSIS. LOW MAINTENANCE with up to 12 months between rechargings. THREE CONFIGURATIONS AVAILABLE to meet most applications. COMPACT DESIGN provides for ease of installation and service. UNIQUE FEATURES insure accurate measurement.

FEATURES AND APPLICATIONS The Rosemount Analytical Model 450 Free Residual Chlorine Sensor, used with the Model 1054B Free Residual Chlorine Analyzer and the Model 1181 free residual chlorine transmitter, measures the free residual chlorine level in a wide variety of applications, such as Potable water treatment, sewage plant effluent, cooling tower chlorination control, swimming pools, and industrial waste treatment plant effluent. The Model 450 sensor is constructed of PVC with polymer membrane, hardwood liquid junction*, and stainless steel hardware. The sensor is designed for flow (Codes 01 and 02), submersion in a flowing sample (Code 03), and submersion in a stagnant pond (Code 04). All sensors are furnished with an integral 20-foot cable. The Code Option 04 incorporates an agitator and impeller, with a 20-foot power cord, for agitation of a stagnant solution so a fresh sample is always present at the sensor membrane in submersion applications. The membrane retainer** is designed for ease of installation, and provides adequate tension on the membrane to insure an accurate measurement. In addition, the electrolyte chamber incorporates a pressure compensator to maintain equal pressure on both sides of the membrane, despite sample pressure changes. A thermistor or an RTD for automatic temperature compensation is incorporated in the tip of the sensor to adjust for temperature change effects on the diffusion rate of free residual chlorine across the membrane. The sensor requires very little maintenance and requires no special tools or fixtures. *U.S. Patent No. 4,187,162 **U.S. Patent No. 3,887,194 **Canadian Patent No. 1,025,496