Which device is commonly used to indicate flow-related activation of a system component (such as a pump) based on flow through the pipe?

Which device is commonly used to indicate flow-related activation of a system component (such as a pump) based on flow through the pipe?

• A. Flow switch
• B. Pressure gauge
• C. Thermostatic mixing valve
• D. Booster pump

Answer: (A)

Flow-related activation of a system component is accomplished with a flow switch. This device detects fluid movement in a pipe and closes or opens an electrical circuit to energize or de-energize equipment like a pump when there is sufficient flow. It ensures the system only runs when water or air is actually flowing, which protects components from running dry and enables automatic control based on demand. The other options don’t fit because a pressure gauge merely reports pressure, not trigger an action; a thermostatic mixing valve adjusts temperature by blending hot and cold water; and a booster pump is the equipment that would be activated, not the sensor that indicates flow.

Flow-related activation of a system component is accomplished with a flow switch. This device detects fluid movement in a pipe and closes or opens an electrical circuit to energize or de-energize equipment like a pump when there is sufficient flow. It ensures the system only runs when water or air is actually flowing, which protects components from running dry and enables automatic control based on demand. The other options don’t fit because a pressure gauge merely reports pressure, not trigger an action; a thermostatic mixing valve adjusts temperature by blending hot and cold water; and a booster pump is the equipment that would be activated, not the sensor that indicates flow.