Reed Switches

Reed switches are a type of electrical switch that is actuated by an applied magnetic field. They are composed of two or more ferromagnetic reeds sealed within a glass envelope. When a magnet or an energized coil is brought near the switch, the reeds are attracted to each other, completing an electrical circuit.

Definition:
A reed switch is an electromagnetic switch that operates by the magnetic attraction of two or more reeds, which are thin, flat pieces of ferromagnetic material.

Function:
Reed switches function by using the magnetic field to close or open an electrical circuit. They are typically used in situations where a physical connection needs to be made or broken without direct mechanical contact, which can reduce wear and tear and increase reliability.

Applications:
1. Automotive: Used in various sensors and security systems.
2. Industrial Controls: For detecting the position of machinery or fluid levels.
3. Home Appliances: In door and window sensors for security systems.
4. Medical Equipment: For controlling the flow of fluids or patient data.
5. Telecommunications: In relays and signal transmission systems.
6. : For control systems in and spacecraft.

Selection Criteria:
1. Magnetic Sensitivity: The strength of the magnetic field required to actuate the switch.
2. Contact Rating: The maximum voltage and current the switch can handle.
3. Environmental Resistance: Ability to withstand moisture, dust, and temperature extremes.
4. Response Time: The speed at which the switch can open or close a circuit.
5. Life Cycle: The number of operations the switch can perform before failure.
6. Size and Shape: Depending on the space constraints of the application.
7. Cost: Balancing performance with budget considerations.

Reed switches are valued for their long life, low power consumption, and high reliability, making them a popular choice in many electronic and mechanical systems.
Please refer to the product rule book for details.