What component do gas chlorinators use to measure the rate of chlorine addition?

Gas chlorinators utilize a rotameter to measure the rate of chlorine addition. A rotameter is a specific type of flow meter that measures the flow of gas or liquid in a transparent tapered tube with a movable float inside. As the flow rate increases, the float rises to a higher position in the tube, corresponding to a specific flow rate. This design allows operators to visually inspect and accurately gauge the amount of chlorine being injected into the water treatment process.

The use of a rotameter is essential in a chlorination system because maintaining the correct dosage of chlorine is crucial for effective disinfection while ensuring safety. If too much chlorine is introduced, it could lead to harmful levels in the water, whereas too little may not effectively eliminate pathogens.

Other options, while related to water treatment systems, do not serve the function of accurately measuring the chlorine addition rate. Flow meters typically measure the volume of liquid passing through a system, pressure regulators control pressure within the system, and thermometers measure temperature but do not pertain to the addition of chlorine in gas form. Thus, a rotameter is distinctly the correct component for this application.