Thought I would give a heads up for these cheapo window alarms from Amazon, they were 20 quid last week for a pack of five but looks like they've gone up in price slightly.
http://www.amazon.co.uk/Diy-Value-Window-Vibration-Shock-Alarm/dp/B00JGSSIYC/ref=sr_1_1?ie=UTF8&qid=1450006650&sr=8-1&keywords=window+alarms
The house has a proper alarm fitted with motion sensors covering the hall and living room but not the front bedrooms or extension (house is a bungalow) so thought would give these window alarms a go. Just fitted them to a number of windows and extension door window and have to say pleasently surprised with them. They are cheaply made but effective with a fitted low high sensitive switch. Once fitted to the glass you only have to tap the glass and the alarm goes off. Word of warning though, the alarm shrill is literally ear piercing and does hurt the ears. The instructions warn to cover the alarm when testing as can cause hearing damage. If anything they would be useful if you're at home at night and would at least warn you if windows and doors are being tampered with. Might not be so useful when away from home. There is a warning written on the reverse of the sticky fixer pad to say its an alarm etc.
Units aren't too large and can be easily switched off. Will see how long they last, powered by 2 AAA batteries.
Tim.
http://www.amazon.co.uk/Diy-Value-Window-Vibration-Shock-Alarm/dp/B00JGSSIYC/ref=sr_1_1?ie=UTF8&qid=1450006650&sr=8-1&keywords=window+alarms
The house has a proper alarm fitted with motion sensors covering the hall and living room but not the front bedrooms or extension (house is a bungalow) so thought would give these window alarms a go. Just fitted them to a number of windows and extension door window and have to say pleasently surprised with them. They are cheaply made but effective with a fitted low high sensitive switch. Once fitted to the glass you only have to tap the glass and the alarm goes off. Word of warning though, the alarm shrill is literally ear piercing and does hurt the ears. The instructions warn to cover the alarm when testing as can cause hearing damage. If anything they would be useful if you're at home at night and would at least warn you if windows and doors are being tampered with. Might not be so useful when away from home. There is a warning written on the reverse of the sticky fixer pad to say its an alarm etc.
Units aren't too large and can be easily switched off. Will see how long they last, powered by 2 AAA batteries.
Tim.