The dry reed switch is composed of a pair of elastic tongues made of magnetic materials. The tongues are sealed in a glass tube filled with inert gas (or vacuum). The ends of the tongues overlap each other but leave a fine gap. The contact on the end face of the reed is plated with a layer of precious metal, such as rhodium, ruthenium, and iridium, which makes the switch have stable characteristics and extremely long service life. Compared with general mechanical switches, dry reed switches have simpler structure, smaller size, higher speed, and longer working life. Compared with electronic switches, it has the characteristics of strong resistance to load impact and high working reliability. Therefore, the reed switch has been widely used in the fields of home appliances, automobiles, communications, industry, medical treatment, and security. Reed pipe components Reed pipes, also known as reed pipes, reed pipes, reed switches, reed switches and magnetrons, are called Reed Switches in English. Reed pipes are made of a pair of elastic reeds made of magnetic materials. Composition, the reed is sealed in a glass tube filled with inert gas (or vacuum), and the ends of the reed overlap each other but leave a fine gap. The contact on the end face of the reed is plated with a layer of precious metal, such as rhodium, ruthenium, and iridium, which makes the switch have stable characteristics and extremely long service life. Compared with general mechanical switches, reed switches are simpler in structure, smaller in size, higher in speed, and longer in working life. Compared with electronic switches, it has the characteristics of strong resistance to load impact and high working reliability. Therefore, the reed switch has been widely used in the fields of home appliances, automobiles, communications, industry, medical treatment, and security. However, due to the structural characteristics of the reed switch, we must be very careful when processing and using it. Otherwise, it will easily cause damage to the reed switch and cause potential quality problems. In particular, we need to pay special attention to the cutting and bending of the lead pins of the reed switch, as well as the installation and welding of the reed switch. The following are specific suggestions. Cutting and bending of the lead leg of the reed switch: 1. When cutting or bending the lead leg, it is necessary to avoid imposing improper stress and damage the glass and metal seal of the reed switch. The appropriate clamping tool is necessary. 2. When cutting or bending the lead leg, the length of the glass tube is 7-20mm: It is recommended that the distance between the glass end and the cutting end/bending end be at least 3mm; above 20mm: the distance is at least 8mm. 3. After the lead pin is cut and bent, the start and release value of the reed switch will increase. Installation and welding of the reed switch: 1. Excessive high temperature for the reed switch may cause cracks and leakage at the glass and metal seals. Therefore, fast and reliable welding techniques must be adopted. The recommended welding conditions are: hand welding: 280 ~ 300℃; automatic welding: 250 ~ 300℃. 2. When the reed switch is welded, the magnetic field effect produced by the welding current can cause the switch of the reed switch to cause damage to the contacts. Therefore, appropriate protective measures must be taken when welding. 3. Do not weld the lead pins at both ends of the reed switch at the same time. 4. Pay attention to the deformation and thermal expansion characteristics of the PCB board when installing and soldering the reed switch to the PCB. The stress may also damage the glass and metal seal of the reed switch. 5. When installing the reed switch on the PCB board, it is recommended to keep a proper distance between the PCB board and the reed switch, or insert the reed switch into the hole of the PCB board. At the same time, all processed dry reed switch products must be 100% tested at the end to check whether there are any defects during the processing of the dry reed switch. Typical tests include: pull-in value, disconnect value, contact resistance, and switch Voltage, switching current, withstand voltage, etc., more complex tests include air tightness tests. If there is no certain processing equipment and testing methods, it is best not to purchase original reed pipes directly, but to use reed pipes or reed pipe components processed by professional manufacturers. The main products are: 1. Plastic-encapsulated dry reed switch: After the dry reed switch is formed by overpressure, the glass tube is better protected. If the pins are further processed, they can be made into SMD packaging, and then tape-and-reel packaging can be directly mounted on automatic SMT. 2. Reed switch + resistance component In the application of liquid level gauge or displacement sensor, it is often necessary to connect the reed switch and resistor in series to detect the position by outputting different resistance values. The traditional method is to solder the reed switch and the resistor on the PCB separately. Now, the reed switch and the resistor (resistance value according to customer requirements) are molded together to form a plug-in module. The customer can easily solder on the PCB board and install them separately. The advantages are: 1. The resistance is made into a module, and the circuit design is simpler; 2. If a certain module is damaged, it is very convenient to replace; 3. After plastic packaging, it can withstand high temperatures of more than 200 degrees, which can meet the requirements of sensor applications in high temperature environments. three. Reed switch potting and packaging After the reed switch is potted, it is what we usually call the proximity switch, that is, the reed switch is packaged in different shells and led out by wires, which can easily form various proximity switches, liquid level sensors, etc. Its main components are: dry reed switch, shell, wire, terminal, etc. Four. Reed switch components The reed switch components can be directly used, and then a float magnet can be added to form a separate water level detection component, which can be widely used in automobiles, home appliances and industrial applications. Its main components are: circuit board, standard wire, reed switch, and float assembly. Dongguan Fuen Electronics Co., Ltd. is a company that has many years of processing and application of reed switches. With its in-depth understanding of reed switches and magnets, it can provide a variety of standardized reed switch application products. At the same time, according to customers' specific Upon request, our application engineers can quickly prepare to provide design, development, and customization services. Business Contact: TEL: 0769-83825052 83825053 Mobile: 1365046775 Contact: Manager Ning http://www.fd0769.com E-mail: 2355836709@qq.com