CyrilHuze Blog
USA
2008-07-08
Looks (and sounds) good to me
Why shouldn't a lock look good on your bike? You must admit that this is one cool looking lock, with its high nickel-content stainless-steel mono-block construction. But I wouldn't be mentioning it if it didn't also perform equally well.
The XENA disc-lock alarm incorporates a 110dB shock and motion sensor that you alarm with a single turn of the key (no on-off switch to worry about). And for the technicians reading me, here's how it works:
When the lock is unlocked by the key: it wakes up an LED arming sensor located in the gap where the brake disc goes. Light is transmitted from an LED source and is reflected by a small mirror and bounced back to a sensor.
When the lock is placed on the brake disc, the light flow is broken and the alarm is armed. To tell you this has happened, it lets out a single arming beep. After it is armed: the shock and motion sensors work independently to tell you if the bike is being tampered with.
So, if any kind of electric shock (say, from a metal tool hitting the surface of the bike or lock, or if the lock is moved against the brake disc enough to generate a small shock) then the alarm triggers. Also, if the bike (and with it the lock) are moved enough, the motion sensor triggers the alarm. After it is triggered: the alarm gives two warning beeps and then sounds a piercing 110dB alarm, which sound for 12-15 seconds before re-setting or continuing, based on whether you have any more disruption.
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