800-825-6758

VP 952-388-2152 (FOR DEAF)

Live better,
no matter how you hear.

Guaranteed Lowest prices. Free Shipping. Free Returns.
Guaranteed lowest prices.

We guarantee the lowest price on every single item we sell, every hour of every day. In the rare chance you find a lower price somewhere else, let us know and we’ll make it right.

Free shipping

Free & fast ground shipping on ALL orders to the 48 contiguous United States. Extra shipping charges apply for orders to Alaska, Hawaii, Puerto Rico, and Canada. View our full shipping policies here.

Free returns.

Orders placed Oct 1 – Dec 31, 2022 and shipped within the 48 contiguous United States can be returned through Jan 31, 2023 for free. We’ll even cover the return shipping. View our full returns policy here.

Lowest prices. Free
shipping & returns.

0

Serene Innovations CentralAlert Notification System CA-DX Doorbell / Door Knock Sensor

2 reviews
The Serene Innovations CentralAlert™ CA-DX Doorbell/Door Knock Sensor works with your existing door chime or intercom door announcer to signal the CA360 unit when someone is at your door. Requires compatible receiv...
MORE

Serene Innovations CentralAlert Notification System CA-DX Doorbell / Door Knock Sensor

2 reviews
The Serene Innovations CentralAlert™ CA-DX Doorbell/Door Knock Sensor works with your existing door chime or intercom door announcer to signal the CA360 unit when someone is at your door. Requires compatible receiv...
MORE

SKU #HC-CADX IN STOCK

Ships FREE today
Most in-stock orders placed before 2pm CT (Mon-Fri) ship the same day. Ground shipping is FREE within the 48 contiguous United States. Expedited shipping options, as well as ground shipping to Alaska, Hawaii, Puerto Rico, or Canada are available for an extra charge.

$45.95

QTY

Lowest price, guaranteed

  • Overview
  • Additional Details
  • Accessories
  • Q&A
  • Customer Reviews
  • Manual
The wireless Doorbell/Door Knock and Door Chime Sensor is part of the CentralAlert Notification System by Serene Innovations. Simply install the CA-DX sensor on the existing door chime or intercom door announcer for vibration detection. When someone rings your doorbell, the CA-DX sensor unit detects the vibration and sends a wireless signal to trigger the CA-360 clock/receiver unit. (An electrical signal from your doorbell activates the CA-DX). Alternatively, the CA-DX sensor can be attached to the inside surface of your door to detect door knocks. The CA-DX has a 2.5mm jack for optional direct connection to an existing doorbell/door chime (no cord included).



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




Features:



  • Detects vibrations of existing doorbell, door chimes, door intercom announcer or knocking and sends a signal to the CA360 unit
  • Easy to install with adjustable sensitivity to avoid false alarms
  • 2.5mm jack for optional connection to existing doorbell/door chime (cord not included)
  • 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"


What else do I need to make this work?


In order to be notified, you will need to purchase a compatible receiver (see Accessories box).

Back to top