Hi everyone, my parents have a veritas 8 alarm.

Randomly yesterday the sensor in their lounge started doing a double beep every 30 seconds. 

They took the front off the alarm, now it just says tamper on it.

Can't see a battery in the actual sensor. They are hard wired.

Does anyone know what the issue might be?

Thanks 

When was it last serviced? From what you describe it's the modern version with the newer failure tone.

If it's been several years since an inspection its very possible the battery in the panel is cooked, which has a possibility of damaging the panel.

You now have two faults with the lid off on the sensor and it in tamper.

 

if its a high pitched beep check your smoke detector batteries alos check the drawers and cupboards for one that was taken down and forgotten about. 

Oh and as SWB says get the alarm serviced before its too late !