DH994 Mechanical Door Alert

No Batteries, No Wiring Needed for this Mechanical Door Alert

Do you have a device that alerts you or your employees when a door is opened?  The DH994 is an easy to install, wireless, no batteries needed door alarm product that will generates a tonewhen the door is opened.   

This will give you peace-of-mind of knowing when someone enters your facility.  From a customer service perspective, this product will alert you when customers enter your store.

  • Description
  • Additional information
  • Reviews (1)

An ounce of prevention is worth a pound of cure! 

This is even more important when dealing with security and customer service.  I continue to be amazed at the lack of security at businesses across America.  Most business, warehouses, retails stores, offices, etc. have some sort of security alarm system for monitoring after-hours, but where most fall short is during normal business hours, there is no mechanism to alert employees when someone opens a door into the facility.

Carlon’s DH994 Mechanical Door Alert is easy to install and easier to maintain.  It does not require any wiring or batteries.  A closed door being opened is the perfect moment to alert you when someone enters/exits your building and is the ideal solution for homes, offices,shopsand small businesses.

The product is purely mechanical.  The main unit attaches to the door frame and a small circular magnet attaches to the door.  When the door is opened, a small plunger pulls from the magnet until it releases.  This release causes the plunger to strike a small metallic plate inside the main unit, which generates the tone sound.

If you don’t have a metal door frame, a metal disc is included so the magnet will attach. Simply mount the disc to the frame to align withchimemagnet and your mechanical door alert system is operational.

  • Easy to install
  • No batteries or wiring required
  • Muting bar silences sound

Additional information

Weight0.6 lbs
Dimensions6.75 x 2.75 x 2 in


kit or accessory

wireless range

sensor type

1 review for DH994 Mechanical Door Alert

  1. 5 out of 5

    (verified owner)

    Excellent ervice. Very impressed by the young woman who took the order. Quick delivery and the bell is exactly what we needed.

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