Flow Switch | How to Select a Flow Switch as per Line Size | Flow Switch Size calculator. A flow switch is an instrument used to detect the presence or absence of flow in a pipe or system. Its main purpose is to monitor, control, or protect equipment by triggering an alarm or switching a device ON/OFF when flow conditions change. Definition: A flow switch is a device that detects the presence or absence of flow (liquid, gas, or air) in a pipe and changes a switch state to trigger alarms, control equipment, or protect systems. basically flow switch is a device that activates a switch when liquid, gas, or air starts flowing or stops flowing through a pipeline. How it works A flow switch has a sensing element (paddle, vane, thermal probe, ultrasonic sensor, etc.) and a switch mechanism (mechanical or electronic). When flow crosses a set threshold the switch changes state (ON ↔ OFF) and sends a signal to pumps, alarms, PLCs, or safety interlocks. Common types ...

Flow Switch – Working, Types, and Applications A Flow Switch is a mechanical or electrical device that monitors the flow of air, liquid, or steam in a system. It helps detect whether flow is within the desired range and sends an electrical signal to control devices such as pumps, alarms, or safety interlocks. Flow switches play a crucial role in preventing equipment damage caused by loss of flow, overheating, or dry running. They are commonly used in water treatment systems, chillers, fire protection, and HVAC systems. ⚙️ Working Principle The flow of fluid pushes a paddle or sensor element inside the pipe. This movement changes the position of a mechanical lever or sensor element, activating or deactivating an electrical contact. The signal is then sent to a control system, pump, or alarm circuit. Construction & typical components Standard flow switches usually include: Body / housing (material matched to fluid) Sensing element (padd...

What are the types of switching mechanism in ATS?  Basically, there are two types of mechanisms that work in ATS – open transition and closed transition. Free transition means break-before-make. Before changing any power supply connection, it will first open the existing connection and then connect to another one. A close transition is a make-before-break. Before breaking any power supply connection, it will first switch to the new connection and then break the previous connection.

What is Auto Changeover Switch? Basically you have two sources of power – primary and secondary. Earlier, when the main power supply went off, the operator himself would go and switch on the secondary power supply. This would take time, especially if it is far from a power source. To solve this problem, auto changeover switch was started to be used. As the name suggests, auto changeover switches are used to automatically switch power between primary and secondary sources. If the mains supply shuts down or fails, this switch will automatically connect the load to the secondary power supply. On resumption of mains power supply, this switch will switch the load back to mains power supply. It works in the same way as a relay. Therefore, this automatic switch acts as a very important component to provide instantaneous power supply. An auto changeover switch has a microprocessor that is programmed to control the switching of the power supply. At one end, it senses the main power supply and a...

Double pole, single throw switch A double pole, single throw switch is also known as a DPST switch. And basically this switch has two inputs and two outputs. And this switch is generally used to turn on or off two different circuits. A DPST switch has four terminals and they are two input terminals and two output terminals. A double pole, single throw switch controls two different circuits simultaneously with one push What is Double Pole, Single Throw Switch (DPST Switch)? Basically a double pole, single throw switch has two input and two output terminals. and control two different circuits simultaneously using a single DPST switch. Example of double pole single throw switch A DPST switch has 2 input and output terminals as shown in the figure. Basically connect two different circuits in this switch to turn the LED or lamp on or off Application of double pole, single throw switch A DPST switch is used to control two different circuits using one switch. Basically a DPST switch regulates...

Double Pole, Double Throw Switch Double pole, double throw switch Also known as DPDT switch, double pole, double throw switch has two input terminals and four output terminals. Basically a DPDT switch has six terminals and out of these six terminals two are input terminals and four are output terminals and normally one input terminal is connected to two output terminals. Basically a double pole, double throw switch consists of two SPDT switches What Is Double Pole, Double Throw Switch (DPDT Switch)? A double pole, double throw switch is a combination of two SPDT switches, and a double pole, double throw switch has two input and four output terminals. Basically this switch connects four different circuits using one switch controls In this switch one input has two different outputs Example Of A Double Pole, Double Throw Switch We add a double pole, double throw switch and four different electrical components as shown in the figure. And this switch works such that if the first positio...

Control Panel And Its Components Control Panel A cabinet containing a collection of electrical components designed to control and protect equipment and devices. Basically the control panel shortlists the given point like power rating of the device, incoming supply, explosion proof category, usage of the device. A control panel is a cabinet that contains electrical components for controlling motors and equipment. In simple terms, a control panel is a combination of electrical devices that use electrical power to control various mechanical functions of industrial equipment or machinery. Control panels control and monitor many mechanical processes. Control panels are used to accommodate equipment for measurement, monitoring, protection, detection, control and process management purposes. The panels are located in the control room as well as in the field known as local control panels for operational convenience. The design of the control panel is based on the type of energy and mobility. P...

  Dusk to Dawn Lighting Switch or   Lighting Switch from Sunset to Sunrise This sunset to sunrise lighting switch or Dusk to Dawn Lighting Switch is designed to control the light illuminated on the LDR sensor. The resistance of the LDR sensor changes with the change in intensity of light falling on LDR. This sensor output is given to IC 555 timer connected in bistable mode. The output of the IC 555 timer is used to control the prompting of load through a TRIAC. Hence, this circuit switches on the load in the sunset and switches off the load in the sun rise automatically. The sunset to sunrise lighting switch or Dusk to Dawn Lighting Switch project is used where the light will continue on only from sunrise to sunset (dusk to dawn). Nowadays, the electricity cost is very high and it is advisable to use electricity carefully. The applications of this project mainly include where more electricity is required in the night time like highways, complexes, colleges, parks, and ind...

  Selector switch A selector switch can control on or off of different currents circuit by rotating the handle. Common used for control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit. Selector switches have two positions and three positions, illuminated and non-illuminated selector switches. Selector switches are available in a variety of styles including illuminated, non-illuminated, and non-illuminated key operated. Styles offered range from maintained or spring return, incandescent or LED, and 3-50 amps. Work with a selector switch specialist to determine the best product for your application. This product overview focuses mainly on the construction and functionality of Non-Illuminated Selector Switches.  What is a Selector Switch? Selector Switch works on a general principle; they contain a simple selector switch on the front of the panel, and a broad range of potential contact combinations (vi...

  Thumbwheel switch Thumbwheel Switches have circular parts with numbers printed on them. The circular parts can be rotated to select numbers which then form a combination of contact circuit ON/OFF signals. Those switches can convert the numbers to binary,decimal,or hexadecimal numbers and output them. What Is a Thumbwheel Switch? A Thumbwheel Switch is a setting switch that converts the numeric value selected by turning a disk-shaped part on which numbers are written into a binary, decimal, hexadecimal, or other code using the combination of ON and OFF signals for multiple contact circuits and that outputs the resulting code. Features Thumbwheel switches easily convert values to binary, decimal, or hexadecimal codes. Visually checking initial values The selected value is displayed as is, so you can always check the set value visually. This makes it easier to prevent incorrect operation. Maintaining set values Conversion to a code uses only a mechanical mechanism, so the set value...

  Rotary Switch What is a Rotary Switch? A rotary switch is a switch operated by rotation. These are often chosen when more than 2 positions are needed, such as a three-speed fan or a CB radio with multiple frequencies of reception or "channels". Rotary Switch Terminology  A rotary switch is electromechanical device which is capable of selecting, making or breaking an electrical circuit  The angle of throw is the amount of shaft rotation between detent / switch position terminals  The detent system of a rotary switch provides an operator with a positive indication of rotation from one switch position to the next Types of Rotary Switch   THROW  The number of switch position terminals per pole  POLE  The terminal that is common to two or more other switch position terminals  BREAK BEFORE MAKE CONTACT  The moving contact breaks the connection with the previous fixed contact before it makes the connection with the next fixed contact  ...

  DIP Switch   Dual Inline Package Switch Dual in-line package (DIP) switches are electronic packages that consist of a series of tiny switches. DIP switches are used to configure computers and peripherals such as circuit boards and modems. Actuator choices for DIP switches include slide actuators, rocker actuators, and side actuated levers (piano).  A slide actuator configuration can have raised or recessed slides.  A rocker actuator configuration can have raised or recessed rockers.  A side actuated lever configuration is typically called piano style, the "keys" are pressed down to actuate.  The number of positions available is equivalent to the number of actuators on the DIP switch. What is a DIP Switch? DIP is short for Dual In-Line Package. A DIP switch is a set of electrical switches packaged in a small box or housing. They are designed to be mounted on printed circuit boards to provide a range of electrical inputs to an electronic device based on th...

  Slide switch Slide switches are mechanical switches using a slider that moves (slides) from the open (off) position to the closed (on) position. They allow control over current flow in a circuit without having to manually cut or splice wire. This type of switch is best used for controlling current flow in small projects. There are two common internal designs of slide switches. The most common design uses metal slides that make contact with the flat metal parts on the switch. As the slider is moved it causes the metal slide contacts to slide from one set of metal contacts to the other, actuating the switch. The second design uses a metal seesaw. The slider has a spring that pushes down on one side of the metal seesaw or the other. Slide switches are maintained-contact switches. Maintained-contact switches stay in one state until actuated into a new state and then remain in that state until acted upon once again. Depending on the actuator type, the handle is either flus...

  Level switch Level Switches are sensors with an electrical contact output at a specific liquid, powder or bulk level.  This is a simple limit switch based level switch. When the float moves with the raise in level then the output contact changes & it indicates the level position. What is level switch? A level switch is a sensor that detects the presence of liquids, powder, or granulated materials at a specific location.(It is also referred to as level sensor) For example, when a tank is supplied with liquid, it overflow.In order to prevent overflows, a level switch is installed near the top of the tank. When the liquid touches the level switch, it outputs a signal to keep the liquid from overflowing the tank. (To detect that a tank is filled with material is referred to full detection, or upper limit detection.) On the other hand, when the liquid level drops as the liquid is discharged, a level switch is used to prevent completely draining the tank. This is...

  Rocker Switch Rocker switches are electrical switches actuated by a standard or dual rocker or paddle. They are available in different configurations including two-position On/Off, three-position, momentary, maintained and more. Rocker Switches get their name from the rock resembling action they do when turned ON or OFF which sounds like horse rock movement.  types of Rocker Switches Mini-Rocker Switch Piano rocker switches Automotive rocker switches Illuminated type Rocker switches. Pole and Throw Configurations SPST rocker switches make or break the connection of a single conductor in a single branch circuit. This switch type typically has two terminals and is referred to as a single-pole switch. SPDT rocker switches make or break the connection of a single conductor with either of two other single conductors. These switches usually have three terminals and are commonly used in pairs. SPDT switches are sometimes called three-way switches. DPST rocker switches m...

  Pressure switch

  Temperature switch