Metal metal button switch button switch manufacturers ALEPH metal buttons

[Metal] button, metal button switch manufacturers, metal buttons ALEPH ALEPH offered by electronic technology. Metal button _ _ ALEPH metal button metal button switch is Guangzhou Yi Li Fu Electronic Technology Co., Ltd. (www.alephchina.com) 2014 has been newly upgraded launched high-power wireless repeater (WS-YZ08) ALEPH WS -YZ08 high-power wireless repeater for 230MHZ, 315HZ, 433HZ wireless device relaying several common frequency oscillation rate of resistance optional wireless transmission distance, built DC12V 4AH battery, a wireless security system long-distance transmission the best choice. Repeaters can extend the coverage of 802.11 network, but to draw attention to several issues. It is noted that a repeater must receive and forward frames on the same channel, which means that your bandwidth is actually divided into two halves. Although the range is more important than the bandwidth, but more distant client transfer rate will be as low as 1Mbps. Because the cost of 802.11, only about half the bandwidth available for data transmission. Due to reasons of bandwidth repeater was again divided into two halves, when multiple users share the same channel even more so, therefore you will encounter bandwidth issues. Another issue to note is that only a few repeaters omnidirectional antenna, and some access points (to enter the repeater mode) will have two antenna diversity. If you want to use a higher gain antenna to extend the range, in any case to use multi-directional antenna instead of omni-directional antenna. Because in the case of using diversity antenna system, you can only have one antenna, so when it does not transmit the busy transport from the opposite direction, causing interference and re-transmission problems. Use multiple repeaters generally ineffective. In short, the radio path is longer, the higher the probability of failure. Guangzhou Yi Li Fu Electronic Technology Co., Beijing Fair Park designated suppliers, our products are used in prisons, factories, businesses, museums and other places. ALEPH infrared curtain is way digital communications to transform the traditional infrared detectors, program control by the CPU, so the new infrared detectors with intelligent, can accurately distinguish each beam, so that the use of multi-beam infrared beams constitute more intensive defense harness; but you can also adjust the CPU's program, set in a predetermined two adjacent beam infrared beam to generate an alarm output is blocked. Since the characteristics of their work, it may constitute entrance windows, balconies and other buildings to prevent the formation of closed, "Royal thieves in the outdoor" is a modern building, free household activity within the user's highly personal security. Magnetic sensor is actually relay a magnet and reed switch (also known as a reed pipe system). Reed is in a glass tube filled with an inert gas, the installation of a set of magnetic reed, reed and cater to this group of contact springs, plays a dual role switch and magnetically permeable. When the magnet close to the reed switch, reed formed ends of the two opposite poles attract each other, when the suction is greater than the reaction force spring, the two contacts, the normally open contact is closed; when the magnets away, spring Attractive piece is less than the reed own reaction force, the spring returns to the initial position, the contact is opened. Magnetic sensor main advantages and disadvantages compared with other forms of sensors are: ① spring has a higher natural frequency, off speed, usually lms - 3ms. General relay 1 / 5--1 / 10; ② small size, light capacity; ③ simple structure, low failure rate; ④ easy installation, no commissioning, its main disadvantage is the switching capacity is small (typically DC24V / 0 2A, If you use a high voltage, high current JAG-5 reed switch will cause high cost, the volume is too large defects), contact resistance is large (typically 0.1 to 0.15 ohms).