# Can Accelerometer cause a false perimeter break?

**URL:** <https://community.zymbit.com/t/can-accelerometer-cause-a-false-perimeter-break/340>\
**Category:** ZYMKEY4\
**Created:** [September 5, 2018, 8:41am UTC](https://community.zymbit.com/t/can-accelerometer-cause-a-false-perimeter-break/340 "2018-09-05T08:41:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Iker](https://avatars.discourse-cdn.com/v4/letter/i/a6a055/32.png) [@Iker](https://community.zymbit.com/u/Iker)\
**Post date:** [September 5, 2018, 8:41am UTC](https://community.zymbit.com/t/can-accelerometer-cause-a-false-perimeter-break/340/1 "2018-09-05T08:41:26Z")

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We are sending some perimeter-detection enabled devices by plane.

We have experienced some issues of perimeter breaking. When checking the devices, perimeter seems fine (we can check no further as encrypted devices no longer boot). Customers say they open nothing.

I am worried about this issue. Can plane-sending be the reason? Could accelerometer cause a perimeter intrusion event?

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**Author:** ![Bob\_of\_Zymbit](https://avatars.discourse-cdn.com/v4/letter/b/82dd89/32.png) [@Bob\_of\_Zymbit](https://community.zymbit.com/u/Bob_of_Zymbit)\
**Post date:** [September 6, 2018, 4:40pm UTC](https://community.zymbit.com/t/can-accelerometer-cause-a-false-perimeter-break/340/2 "2018-09-06T16:40:54Z")

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Hi @Iker,

The 4i cannot be configured to destroy the keys when a tap detection occurs. Only the perimeter detect circuits can be configured this way.