Another option might be the use of "Wireless Sensor Tags". Bushman, one of our WXFORUM members, recommends them. Here is his link to the wireless sensor tags website for additional information.
I've toyed with the idea of using the wireless sensor tags for measuring and monitoring temperatures in various places around my home. They not only measure temp but also detect movement of the sensor.
I've toyed with the idea of using the wireless sensor tags for measuring and monitoring temperatures in various places around my home. They not only measure temp but also detect movement of the sensor.