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Pressure Switches, Flow Switches, Temperature Switches, Level Switches etc.

Relays in Ladder Logic Tutorials

S Bharadwaj Reddy
Electromechanical relays may be connected together to perform logic and control functions, acting as logic elements much like digital gates (AND, OR, etc.). A very common form of schematic diagram showing the

Relay Principle & its Types

S Bharadwaj Reddy
A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are

Reed switch Working Principle

S Bharadwaj Reddy
The reed switch is an electrical switch operated by an applied magnetic field. It was invented at Bell Telephone Laboratories in 1936 by W. B. Ellwood. It consists of a

Two Wire Sensors Working Animation

S Bharadwaj Reddy
2-Wire vs. 3-Wire Sensors can also be broken down by their wiring configurations. The most common are 2-wire and 3-wire. Two-wire devices are designed to wire in series with the

Proximity switches Circuit Diagram Operation

S Bharadwaj Reddy
A proximity switch is one detecting the proximity (closeness) of some object. By definition, these switches are non-contact sensors, using magnetic, electric, or optical means to sense the proximity of objects. A

Pushbutton switches and Types of Switches

S Bharadwaj Reddy
A hand switch / Pushbutton switch is exactly what the name implies: an electrical switch actuated by a person’s hand motion. These may take the form of toggle, pushbutton, rotary, pull-chain,

Basics of Switches – NO/NC Contact

S Bharadwaj Reddy
Perhaps the most confusing aspect of discrete sensors is the definition of a sensor’s normal status. Electrical switch contacts are typically classified as either normally-open or normally-closed, referring to the open or

Differential Pressure Switch Principle

S Bharadwaj Reddy
The Differential Pressure Switch just like the pressure switch is a simple electro- mechanical device that operates on the basic principles of Levers and opposing forces. They are mainly used

Zero Speed Switch Working Principle

S Bharadwaj Reddy
Monitoring Speed is essential in any automation process. Speed of any equipment driven by an electric motor can very due to variety of reasons e.g. overload, underload, breakage of transmission

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