Get 10% Off* + $15 Reward$ | Code: HPFYJN

Online since 2002 |   866-316-0162

Serene Innovations CentralAlert Wireless Door-Bell Knock Sensor


Item# Description Pkg reward$ Price Blank
Item #: CA-DX
Dimensions: 2.5" x 3.8" x 1"

Serene Innovations CentralAlert Wireless Door-Bell Knock Sensor detects vibration and sends a wireless signal to trigger the CA-360 to alert when someone rings your door bell. Install device on existing door chime or intercom door announcer for vibration detection or, you can attach the CA-DX to the inside surface of your door to detect the knocking on your door.


  • Serene Innovations CentralAlert Wireless Door-Bell Knock Sensor detects the vibration of your existing door bell, door chimes, door intercom
  • Can be wired directly to the doorbell terminals where the electrical signal activates
  • Simple to install with adjustable sensitivity to avoid false alarms
  • 2.5mm Jack for direct connection to your existing doorbell/door chime
  • With this method, electrical signal from your doorbell terminal activates CA-DX
  • 2.4GHz operating frequency
  • Up to 200 ft operating range
  • Uses 2 AA alkaline batteries (not included)
  • Also available (separately):
    -Serene Innovations CentralAlert Wireless Notification System Clock or Receiver (Code CA-360)


Particulars Dimensions
Advanced Technology 2.4 Ghz Smart-Code
Operating Range Up to 200ft, open space - actual distance varies according to house construction
Battery Type 2 AA size alkaline
Battery Life Up to 10 months
Operating Temperature +10°C to +30°C

Customer Reviews


{{x.ShortDescription}} ...


Please enter your and your friends email address below.

Fields marked with * are compulsory

Your Name*
Your Email Address
Friend's Name*
Friend's Email Address
The selected product information along with Reward Dollar coupon code has been successfully emailed to you and your friend.

Thank you for using