Flow switches are used to detect the flow of a fluid or gas. In most cases, these devices contain two plates (or paddles) that move together when a certain amount of liquid passes between them. The paddle flow switch has several advantages over other types of controls.

An Overview of Paddle Flow Switches

Paddle flow switches are a type of flow switch that measures the amount of liquid passing through it by measuring the rate at which a paddle is pushing it. The paddle rotates inside a cylinder, and when it passes through the liquid, it senses the resistance created by the fluid and translates that into an electrical signal. This electrical signal is then sent to your control system so you can keep track of how much liquid has passed through.

Paddle flow switches have several advantages over other types of flow switches:

  • They're reliable and easy to use.
  • They can be used with liquids from 0°F (-18°C) up to 400°F (204°C).
  • They're available in many different sizes.
  • They are easy to install with simple mounting options.

What is a paddle flow switch?

A paddle flow switch is a device used to detect the fluid flow in a pipe. It consists of two pieces: the paddle and the switch. The fluid moves the paddle as it passes through and either opens or closes the switch depending on how much pressure is exerted by that flow.

Paddles are usually made from plastic or metal, depending on what material is needed for their application. They can be shaped like fans or paddles and may come in many different sizes depending on what kind of fluid we want them to detect.

Advantages of Paddle Flow Switches

Paddle flow switches are low-cost, easy to install, and highly reliable. They can be utilized in many different applications.

Applications for Paddle Flow Switches

Flow switches can be used to detect leaks in steam lines and water lines alike. They're often used with a pressure switch, making them so valuable. A pressure switch will cycle on and off at a given set point, but if there's no flow to trigger it off, it will stay on. If there's a leak somewhere in the line, however, then the flow of fluid past the paddle will act as an additional trigger for the pressure switch and cause it to turn off earlier than usual.

Paddle flow switches are also good at detecting high-pressure situations where other controls fail or become damaged (such as on heavy equipment).

These switches are usually more cost-effective than other types of flow switches.

Paddle flow switches are a cost-effective option for your industrial or commercial application. They are also easy to install, reliable, and can be utilized in applications.

Paddle flow switches work by sensing the pressure change when liquid passes through the button. When no fluid passes through, the paddle will not close because there is no force on it from either direction. However, when any liquid passes through one side of the switch, it will be pushed into an open position by that force until enough fluid has gone through so that there's no longer any pressure pushing back on it from either direction (i.e., equalizing). This process creates what's known as a partial vacuum within each chamber (one side has air in front of it while another side has atmosphere behind).


In conclusion, paddle flow switches are a practical and cost-effective way to measure fluid flow. They can be utilized in various applications, from monitoring water usage in your home or business to ensuring that your HVAC system is operating at peak efficiency. Flow switch paddle are easy to use and are available at an affordable cost. Additionally, they don't require special equipment or maintenance.