Need somthing not to elaborate but it needs to send a signal around 100 meters, have got mains electricity where it will be sited, just a simple warning device that someone is lurking will do.

Anyone recomend anything ?

what about taking a look at X10 kit?

http://www.uk-automation.co.uk/products/Marmitek-X10-Motion-Detector-(MS13E).html

I've used something similar to these in the past.

http://www.edgarsson.co.uk/infratec.htm

Something like this.

B2- WIRELESS SHOP VISITOR PIR SENSOR WITH PLUG IN DOORBELL/CHIME/ ALERT ALARM (5060236640529) | eBay

or

Driveway Alert-Security Motion Sensor-Visitors(313) | eBay



[Edited on 19/05/04 by PAUL FISHER]