Computers and Technology

You Should Know Everything About Water Flow Switch


 The flow switch is a vital piece in a flow setup as it monitors the flow of liquids, gases, and steam and sends a trip signal to pumps or circuits to either turn on or shut down the flow. The flow switch can also signal the alarm to alert the technicians; it is a crucial cooling circuit protection setup.

Water Flow switches are flow meters that gauge and control fluid flow using a switch to the pump or alarm to keep the setup stable. The meters are used in air conditioning, fire sprinklers, hot water space, chlorination in swimming pools, and liquid transfer systems. There are many flow switches here that are the most trendy.

Paddle flow Switch

Flow Switch-Paddle Flow Switch

A paddle flow switch is a mechanical switch activated by the pressure of the fluid in the pipe. The paddle is made of a small strip of metal and, in some cases, plastic that is attached to a tension spring or a series of magnets.

If the strip is in a resting point, it is open or closed depending on its use, and the system has been fixed to detect the fluid flow in the duct. As the liquid medium goes through the pipe, its force is gauged by the water flow switch if it reaches or exceeds the set flow rate point. The water flow switch will trip an alarm or an action response if the flow rate exceeds the set target. It is the people who either lower or raise the flow rate.

Thermal flow switch

Flow Switch- Thermal Flow

This type of water flow switch has no moving parts like the mechanical flow switches that rely on a paddle to gauge flow; instead, a sensor is put in the tube. The sensor is heated to maintain steady heat by an electric charge. The law of thermal dispersion is used to get the flow rate by figuring out how fast the medium’s heat is lost. 

The charge used to keep the sensor at a steady heat is used to get the liquid’s flow rate. The meters are useful as they can detect both very high and low flow rates. They are used in setups that have harsh conditions and are easy to fix and start using. 

Calorimetric flow switch

Flow Switch-Calorimetric flow switch

The calorimetric flow meter works in the same manner as a thermal flow switch with just a small exception; it has two sensors inserted into the tube rather than one. The second sensor is there to gauge the heat of the fluid from the heated sensor. The heat is gauged in both of the sensors, and the difference is noted. A large heat change shows a low flow rate and vise versa.

Pneumatic Flow Sensor

Flow Switch-Flow Sensor

This flow switches us to air valves to control the air entering the setup, thus keeping the flow rate steady. The air valve is set to leak pressure out of the system if the flow rate is too low. The only shortfall with this flow switch is the system must have a pressure difference between the pipe areas carrying the air or steam.

Ultrasonic Flow switch

Flow Switch- Ultrasonic Flow Switch

Suppose you are looking for a flow switch that does not intrude into the pipe to gauge the flow rate. The flow switch uses the doppler effect to gauge the flow rate of the fluid in the tube. Additionally, for those seeking a non-invasive yet highly accurate method to monitor water usage in real-time, the bluebot clamp-on water meter offers an innovative solution, easily attaching to the outside of pipes without the need for professional installation. A transducer sends an ultrasonic signal into the fluid, and it also receives back the signal as it bounces off the air bubbles in the liquid. The delay in return, also called the doppler effect, is used to get the fluid flow rate.

These types of flow switches suit aerated liquids and perform poorly with drinking or distilled water.

Final word

Flow switches help to automate the process of flow rate gauging the flow rate. You can use the tools to ensure a steady flow of fluid where exact amounts of fluid are needed. You can always buy any flow switch to meet the many needs to gauge and limit the flow rate.

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