How to test the sealing performance of waterproof metal push button switches

First of all, we must know the classification of button switches: Buttons can be operated according to classification, protection, common button types and characteristics: Open type: Suitable for installation and fixing of switch boards, control cabinets or control panels. Protection: With a protective shell to protect the button parts from mechanical damage or human contact with live parts. Waterproof: Seal the shell to prevent rainwater from intruding. Anti-corrosion type: It can prevent the intrusion of corrosive gases in the chemical industry. Explosion-proof: It can be used in places containing explosive gas and dust, and will not cause explosions, such as coal mines and other places. Knob type: The handle rotates to operate the contact, there are two position switches, generally used for panel installation. Key type: Insert the key into the rotation operation to prevent wrong operation or special operation. It can be used with confidence in some humid environments where waterproof button switches are required. At present, there are many brands and types of waterproof button switches on the market, but in a true sense, button switches have good waterproof and sealing performance or less. There are many types of waterproof button switches, which can be divided into common button type, mushroom head type, self-locking type, self-reset type, rotary handle type, light type and button type. There are single button, double button, three buttons and different combinations. The utility model adopts a building block structure and is composed of a button cover, a return spring, a bridge contact, a shell and the like. The sealing performance of the waterproof button switch is tested according to the following standards: 1. Does the certification comply with rohs, sgs certification, vde/demko/kema (now using eu enec), ul/csa, etc. These are the certification requirements for high-quality waterproof push button switches. If it must be exported overseas. The main evaluation standard for the waterproof performance of the waterproof switch is the waterproof grade standard. Looking at the waterproof performance of the waterproof switch, it mainly depends on the two digits xx after ipxx. The first x is from 0 to 6, the high-grade 6; therefore, the waterproof button switch has a waterproof grade of ip68. Other judgment standards Waterproof button switches are reasonably designed, have a long service life, are resistant to high temperatures, and are resistant to large current impacts, and can be carefree