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Reed Sensors in Impact sensors for triggering airbagsStatistics say almost 80% of automobiles use reed switch based crash sensors for triggering airbags. A ring magnet is mounted on a very precise tension spring and this assembly is slid over a reed switch. Depending on the impact which is required to trigger the reed switch, different tension springs are used. In most crash sensors, two reed switches are used instead of one as a failsafe mechanism. When a crash occurs, the mass of the magnet compresses the spring and moves closer to the reed switch, closing it. This signal is used to trigger the compressed cylinder which inflates the airbags. Suitable products: MM-1018 and UM-0018 ultra-miniature reed switch in shock sensors. |
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Reed Relays and Electronics India Limited, 2008
