X-Sense CO-3D-W Link+ Carbon Monoxide DetectorX Sense CO Sensor CO 3D W Link+. The X Sense CO03D W Link+ is an advanced wireless carbon monoxide sensor that offers the highest level of protection against the dangerous and odorless gas carbon monoxide (CO). With its wireless connectivity feature, this sensor creates a safety network in the home, allowing it to synchronize with other X Sense Link+ alarms, meaning that when one sensor detects a danger, all other devices on the network immediately