CentralAlert CA-DX Notification System Doorbell/Door Knock Sensor

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The wireless Doorbell/Door Knock and Door Chime Sensor signals the CA360Q Loud and Flashing Receiver to be alerted in other rooms. The CA-DX sensor can also be attached to the inside of your door to detect door knocks.

To see how to register ("learn") the CA-DX doorbell/door knock sensor with the CA-360Q clock/receiver, see the video below:


  • Detects vibrations of existing doorbell, door chimes, door intercom announcer or knocking and sends a signal to the CA360Q unit
  • Easy to install with adjustable sensitivity to avoid false alarms
  • 2.5mm jack for direct connection to existing doorbell/door chime
  • 2.4GHz operating frequency
  • Up to 200 ft operating range
  • Uses 2 AA alkaline batteries (not included)
  • Dimensions: 2.5" x 3.8" x 1"