So you want to be able to monitor the status of a door or window at home? The Fibaro Z-Wave Door/Window Sensor can help. It monitors the open/closed status of doors, windows, and other objects. It works for cabinets, refrigerator doors, or even roller blinds. Just bring your Z-Wave network controller, and you are set.
The device has a tamper button to detect removal or tampering. There is also a low battery alert feature. Sets you back under $50.