Choosing Between Rotary, Pressure and Light Switches

Lifestyles are changing and people have no qualms about spending money on products that look good and offer value for money. To keep up with this change of scenario, every single day there are new additions to the already expanding resources. Read on for information about switches that bring a spark into your life!

Rotary Switches

This switch is used on devices that have two or more different modes of operation. Some of the devices under this category include the three-speed fan or a CB radio that has multiple frequencies of reception.

The rotary switch is made up of a shaft (rotor) that has a contact arm (spoke), which juts out from its surface like a cam. Along with these parts it has an array of terminals that are arranged in a circle around the rotor. Each such terminal serves as a contact for the contact arm (spoke) through which any one of the number of different electrical circuits can be connected to the rotor. Multiple poles are allowed because the switch is layered.

These switches are used to provide power to the heaters of a helicopter rotor. This switch includes a conductive rotor with conductive protrusions located within it. The conductive fingers are arranged in such a way that a pair of conductive fingers are always in electrical communication with a pair of conductive protrusions for a given position of the conductive rotor. There is electrical communication between the conductive fingers and the heaters of the helicopter rotor. It is because of this feature that if one pair of electrical fingers fails to make an electrical contact with its respective conductive protrusion electrical power is still delivered to the heater.

Pressure Switches

You cannot go wrong with a pressure switch as these switches can sense a change in pressure. When the pressure changes, these switches alternately make and break an electrical connection.

There are various pressure switches in the market. One of them, the set-point switch actuates when a specified pressure is reached and the pressure-measuring switch is able to measure the ambient pressure and reacts accordingly. When there is an application of mechanical and atmospheric pressure, the mechanical pressure switches provide an output signal in the form of a switch closure. There is also the differential pressure switch that utilizes differential fluid pressure, which goes from low to high-pressure sources to start an electric switch at a pre-set actuation point. The pressure switch is used in aircrafts, automobiles and other environments too.

Light Switches

Like the name suggests, the light switch is used to operate electric lights, electrical outlets or permanently connected equipment. These switches are set in the walls and placed about 6 to 10 inches away from the door. The kind of switches mentioned above are used to operate the lights that are placed on the ceiling. Another kind of switch is the one found on torches. Those ones are placed near the bulb or near the tail. Sometimes the entire head constitutes the switch.

Today light switches are made up of ceramic, plastic or metal. These switches come with plate covers called wall plates that prevent accidental contact with the live terminals of the switch. Apart from wall plates being in different materials, they are also available in different colors and styles. With the choice available, you are sure to find a switch and wall plate that goes with the décor.