A flow sensor is an instrument that measures the rate of water, air, or other fluids moving through a system. In HVAC and water heating, these sensors help monitor airflow and hydronic flow to keep equipment operating efficiently, detect abnormal conditions, and support automatic control. Flow sensors come in several types, including turbine, ultrasonic, and thermal designs, each suited to specific flow ranges and media.
/floʊ ˈsɛnsər/
A flow sensor is an instrument that measures the rate of water, air, or other fluids moving through a system. In HVAC and water heating, these sensors help monitor airflow and hydronic flow to keep equipment operating efficiently, detect abnormal conditions, and support automatic control. Flow sensors come in several types, including turbine, ultrasonic, and thermal designs, each suited to specific flow ranges and media.
Why are flow sensors important in HVAC and water heating?
They verify airflow or water flow, helping systems stay efficient, safe, and stable while enabling automated control.
Source: The Cooling Company
Flow sensors provide real-time data for HVAC and water heating control.
In a commercial HVAC system, a flow sensor helps balance air distribution and verifies chilled water flow to coils. In water heating, flow sensors monitor recirculation loops or tankless demand to deliver consistent temperature and detect leaks or blockages.
Calibrate and inspect flow sensors during routine service so your HVAC and water heating controls can rely on accurate flow data.
“Calibrate and inspect flow sensors during routine service so your HVAC and water heating controls can rely on accurate flow data.”
Flow sensors are also used in medical devices, automotive systems, and aerospace fuel management.
Do flow sensors work for both air and water?
Yes. HVAC airflow sensors and hydronic flow sensors use different designs, but the purpose is the same: accurate flow measurement.
Can a bad flow sensor affect comfort?
Absolutely. Incorrect readings can cause poor airflow, unstable water temperatures, or inefficient operation.
How often should flow sensors be calibrated?
At least during routine annual service, and more often in critical commercial systems.
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