What is a Reed Switch?
A reed switch (Reed Switch) is also called a reed switch, which is an electric switch operated by an applied magnetic field.
- Place a reed switch around the coil so that the coil through which the current passes is equivalent to the magnetic field generated by a permanent magnet.
- A coaxial shield is placed around the switch so that high-frequency signals are switched to 20GHz.
- Because the reed switch has no wearing parts, the contacts can switch low-level signals.
- Reed relays are widely used in the entire field of test and measurement.
- Test system, matrix, RF, modem, alarm, ideal for reed relays:
1. High cycle count 2. High voltage application 3. Low current, low voltage switch- Using a reed switch, the reed sensor can sense that various movements use permanent magnets.
- Reed switches draw zero current when they are on, which makes them ideal for energy-saving equipment applications.
- Magnets are applicable even when air, plastic and metal are separated
- Magnets and reed switches are generally separated by physical covers or other obstacles.
- Reed sensors are used to detect motion, count, detect liquid level, liquid level measurement, switch in harsh environments, implant equipment, etc. [3] .
- In 1936,
- The reed switch is sealed in a glass tube by two magnetic reeds (usually composed of two metals, iron and nickel). The two magnetic reeds are overlapped but there is a small gap in the middle. An appropriate external magnetic field will bring the two magnetic reeds into contact.
- The contacts on the two reeds are plated with a very hard metal, usually rhodium and ruthenium. This layer of hard metal greatly improves the life of the switching times. The glass tube is usually filled with nitrogen or some equivalent inert gas, and some magnetic reed switches will make the interior a vacuum state in order to improve the switching voltage performance.
- The working principle of the reed switch is very simple. Two magnetizable reeds (usually composed of two metals, iron and nickel) overlapping at the ends are sealed in a glass tube. There is a small gap (only about a few
- The reed switch is a unique technology, and hermetically sealed feature allows it to be used in almost all environments. Although the structure of the magnetic reed switch is simple, its manufacturing process includes many processes. In recent years, the size of the reed switch has grown from about 50 mm (2 inches) to as thin as 6 mm (0.24 inches). The emergence of these small sizes makes it applicable to more fields, especially to meet
- Reed switches have been widely used in home appliances, automobiles, communications, industrial, medical, security and other fields. Briefly explain the application of reed switches in reed relays and reed sensors.