moving sensor

What kind of movement do you want to detect?
Would a vibration sensor work?

 

A vibration sensor should work better than a tilt switch.
Are you trying to track it or just want to be aware of the movement?

 

Is this for in the house, a specific room that you want to protect?
Will the pet wear the buzzer and the sensor?
Can you use a motion sensor?
If the pet licks or chews to satisfy an itch the alarm could be going off almost continually.

 

I think what you want is a proximity alarm.

 

Hi Dave;
I think what he wants to do is detect a pet that is trying to access his garden.
There are still some unknown variables such as what the pet is and how confined the access is to the garden.
If it's a dog then a buried dog fence would work, I don't know how well they work on a cat and I don't know if a goat would catch on to the idea.
A motion detector or a beam might work.

Kevin.