A Switzer Flow Switch is a system used to control the flow speed and pressures of liquids, air or other gaseous media via a pipe, system or loop, which is sometimes called a flow sensor or flow indicator.

These  Switzer switches or sensors can be used to monitor the flow over a certain time period or to continuously regulate the total flow. A flowmeter or indicator may not be a true flow’ switch’ in technology-it’s more correctly called the meter / indicator if the system just records and displays information.

Nevertheless, in the majority of cases they will cause actions and stop / start other components in the system-for instance pumps-to change the flow rate and pressure to the required and configured level.

How does a Flow Switch work?

It is useful to show how a typical switch or sensor of this type works and what it does on the core components.

The key device, connected with the mechanism and placed within the channel via which flows liquid or gas, is several different types of paddle or magnetic triggering. This paddle is transferred or rotated to a secondary part known as the transducer, and transmits a signal read back to it.

This raw signal is taken from the paddle by the transducer and transmitted to a readable transmitter. This reader actually examines the parameters of a predefined set and performs any signal or measure necessary for changing the behavior of the device and the mechanism.

Through a specific system or over the entire system, flood switches may track, record and regulate the fluid or gas flow rate, ensuring the flow stays within these parameters pre-fit. If the rate is above and below what is necessary, an alarm, pump power, diversion flow, shutdown of parts of the system can be activated instantly. The action a switch does depends entirely on the type and purpose of the switch.

The actual paddle will not all flow switches. Also quite popular are ultrasonic and other non-intrusive models, which operate by rebounding a signal from the monitoring medium. This is especially valuable if the medium is contaminated, harmful or physically harmful, or if no moving components can be exposed to constant wear or tear.

Rotaflow or Flow Area Variable Sensors are simpler equipment used to measure, restrict or permit the free transit, or fuel, of a tapered tube with a float (or, at times, an electromagnet). There are different types of magnetic flux switches available and in a variety of applications can be extremely effective provided the medium is slightly leading.

Flow Switch Uses

A liquid flow switch is applicable in chlorination of swimming pool, hot water heating, air conditioning, liquid transfer systems, fire sprinkler systems, & industrial laser cooling systems.

For water sprinkler systems, water flow switches are introduced. For example, in the case of a fire, an electrical fire warning device can be activated by a flow switch.

Air flow switches are used to clean room filter systems, exhaust ventilation, & air treatment systems.

Flow switches are used in other applications, such as:

  • Water treatment systems
  • Additive or blending systems
  • Air supply systems
  • Duct type heating.