moving monitoring

[gatoulisss]

hello guys,
what is the best sensor to monitor a movement? for example if something moves then a buzzer sounds if it stops then silent.
i was thinking a tilt sensor like SW-520D but under specific situations then it doesnt work.
is an accelerometer sensor good for this work?

thanks a lot!

 

[Tony Stewart]

How much movement? And what defines a false trigger?

 

[gatoulisss]

is like a tracker when the thing i track moves no matter witch position then the buzzer will sound if it is not moving then nothing happens.