Hi Keith, sorry to hear your sensor is having an issue. Feel free to email us for maintenance tips.
If you’re looking to pick up a new sensor, you can set it up as a new device in the same location as the previous sensor, although I would recommend having it not at the exact same coordinates, since this will make it harder for you to view the older data on the map.
Over time, the old sensor will “drop off” the map, but it will always be there. You can open the Map Configuration Menu and adjust the “Show sensors reporting or modified within” setting to continue to view the old sensor.