Magnetic switch is different from the usual switching device, which is also called magnetron switch. It is a kind of circuit switching device controlled by magnetic field signal. Many people may be interested in this new type of switch, so the next step is to make a detailed explanation of how the magnetic switch works.
What is a magnetic switch ？
Magnetic switch is a switching device induced by magnets. The commonly used magnets are sintered NdFeb, rubber magnet and permanent magnet ferrite. The switch is a dry reed tube, or reed tube for short, which is a passive electronic switching element with contacts. The shell is usually a sealed glass tube filled with inert gas and equipped with two iron elastic reed plates.
Working principle of magnetic switch
1. The reed tube in the magnetic switch, also known as the magnetron, is a switching element controlled by magnetic field signals. When the circuit is disconnected without magnetic field, it can be used to detect the mechanical movement or the state of the circuit. When the magnetic switch is not in operation, the two reeds in the glass tube are not in contact. If there is a magnetic material close to the glass tube, under the action of the magnetic field, the two reeds will be magnetized and attracted together, so that the circuit is connected. When the magnetic material disappears, without the influence of external magnetic force, the two reeds will separate due to their own elasticity, breaking the circuit.
2. A magnetic switch is a multi-point or one-point reed switch set in a closed plastic tube or metal. The whole container is hollow and equipped with a floating ball with a ring magnet inside. The action of opening and closing the switch is generated by a magnet in the floating ball to attract the contact of the reed switch.
3, there is a magnetic switch is often said to be the near switch, also called the door magnetic switch or induction switch. It has a standard size plastic shell, the reed pipe is pored inside the black shell, the wire is led out and the other half of the plastic shell with magnet is fixed at the other end. When the magnetic material is close to the switch with wire, the distance is about 10mm, the switch will issue a switch signal.
Characteristics of magnetic switches
1, can be used for multi-point control, cost saving, easy installation.
2. Contact capacity 50W/250VAC SPST or 30W/200VDC SPDT.
3. ABS, GL, CR international ship class certification and Ex explosion-proof certification.
4, terminal box specifications complete, plastic, aluminum alloy, stainless steel explosion-proof type, protection level IP-65 or more.
5, PP, PVDF material can be applied to strong acid and alkali places; SUS 304/316 metallic material for high temperature and high pressure barrel slots.
6, the connecting flange has JIS, DIN, ANSI specifications; The mouth has NPT, PF, BSP and other specifications.
Magnetic switch applications
1, the reed tube can be used as a sensor, used for limit, counting, etc., applied to the production of window magnetic, door magnetic and other security systems,
Also widely used in a variety of communication equipment.
2. Proximity switch is widely used in telephone sets, security doors, printers, household doors, fax machines and other electronic instruments and equipment.
After reading the detailed explanation of the working principle of the magnetic switch, I believe that everyone has a certain understanding of the magnetic switch. Magnetic switch is a kind of household appliances, understand some knowledge of magnetic switch is helpful to us.
