What role does a flow sensor play in a chemical feed system?

In a chemical feed system, the flow sensor serves a crucial function by measuring the flow rate of water or the chemical solution being processed. When the flow rate reaches a predetermined threshold, the sensor signals the chemical feed pumps to activate. This ensures that the appropriate amount of chemicals is introduced into the system in a timely manner, which is essential for maintaining the effectiveness of the treatment process.

For instance, if the flow rate indicates that water is moving through the system at a certain speed, the flow sensor ensures that chemical doses are being introduced proportionally, maintaining the desired concentration levels. This automated response helps optimize treatment efficiency and accuracy, preventing both underdosing and overdosing of chemicals, which could have detrimental effects on water quality and system performance.

The other options describe functions that are not relevant to flow sensors. For example, adjusting chemical composition or softening water involves different processes and equipment. Additionally, removing contaminants typically involves filtration or purification systems rather than the measurements and controls performed by a flow sensor.