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Difference between Flow Meter and Flow Switch | Flow Meter Vs Flow Switch

This page compares Flow Meter Vs Flow Switch and mentions difference between Flow Meter and Flow Switch.

Flow Meter

The device used for measurement of flow rate or quantity of gas/liquid moving in a pipe is called flow meter.

In other words it is an instrument used to monitor, to measure and to record the rate of flow, pressure or discharge of liquids/gases.

Examples of FLow meters:
• Differential Pressure Flow Meters (Orifice plate, Venturi meter, flow nozzle, Rotameter)
• Positive Displacement Flow Meters (Piston Flow Meter, Gear Flow meter, Helical Flow meter)
• Open Channel Flow Meters (Flumes, Weir, Sluice Gate)
• Electromagnetic Flow Meter

Flow Switch

• Definition: The mechanical device used to control flow of air/steam/liquid is known as flow switch.
• The flow switches transmit trip signals to another devices (usually pumps) within the system in order to turn off or turn on. This helps in protecting damage to the system and to protect cooling circuit in the system.
• The flow switches are used to actuate alarms as well as used to control relays.

Examples of Flow switches:
• Water flow switch: Used in water sprinkler system
• Air flow switch: Used in room filter system, air treatment and exhaust ventilation system etc.

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