Many people don’t realize they don’t need an entire commercial alarm system to reap the benefits of door alarms. Magnetic door alarms, touch versions, and even doorstop style alarms are all compatible with most standard doors and they’re incredibly easy to install. If you’ve got a few minutes and a battery or two you have what it takes to keep your loved ones safe. The Home .In commercial environments, the door alarms can be pressed and used to alert workers that someone is at the door. Belt worn pagers are often the main choice for the workers, when receiving the chime or alarm..About this Category. We offer a diverse selection of exit alarms for commercial and residential buildings, including surface mounted exit alarms, door alarms, and flush exit alarms..For both commercial residential use, door alarms alert to entrances exit. View our DIY products on doorbell.com.