Safety Technology International, Inc. (STI) - Waterford, MI
Manufacturer, Custom Manufacturer
Protective alarm for single or double doors. When protected door is opened, the device emits a piercing alarm. Does not restrict legitimate use of door. Selectable volume & alarm timing.
www.sti-usa.com/search.asp?Page=1&andor=AND...

BeStar Technologies, Inc. - Sierra Vista, AZ
Manufacturer
QS 9000, ISO 14001 & TS/ISO 16949 certified manufacturer of custom door alarms including magnetic material detection alarms. Available in 5 mm x 5 mm to more than 250 mm dia. sizes with -40 degrees C to +85 degrees C operating temperature. Capabilities include in-house tooling & injection molding. VDS approved.
Brand Names: BeStar
www.bestartech.com/products-sirens/bells-c-...

Halogen Supply Co., Inc. - Chicago, IL
Distributor
Stocking distributor of gate, door & window alarm systems or alarms. Various features include programmable entry/exit codes, single button pass/reset operations, auto battery chirps & hardware.
Brand Names: YardGard
halogensupply.thomasnet-navigator.com/categ...

Time & Parking Controls - Upper Darby, PA
Custom Manufacturer, Service Company
Distributor of door alarms. Products include access control systems for interior & exterior door control & alarm point monitoring. Door alarms can be integrated with biometric readers for security authentication, access control software systems for scheduling of door activity control, telephone entry systems for visitors, monitoring & control of detection systems like intrusion, carbon monoxide & fire/smoke & employee photo/visitor identification systems. Design, installation & support services are available.
Brand Names: OnGuard
www.timeparking.com/building-security/acces...

Vector Security - Lancaster, PA
Service Company
Burglar alarm systems with door/window contacts, featuring control panels, wireless keypads and key chains, motion sensors, glass break detectors, mobile solutions, uninterruptible power supplies and cellular back-up.
www.vectorsecurity.com/Home-Alarm-Monitorin...

Door Professionals, Inc. - Waukesha, WI
Distributor, Custom Manufacturer, Service Company
Sales, installation & service of a broad range of door alarms for the protection of property & equipment. Suppliers of standard, custom & remote alarm systems.

Maffey's Security Group - Elizabeth, NJ
Distributor, Service Company
Distributor of door alarms including intrusion, door ajar & motion detection systems. Central monitoring, installation & organization also available. Installation, survey & compliance services are available, as well as inspections, cleaning, adjusting & repairing. Most major brands available.

B.E. Atlas Co. - Chicago, IL
Distributor, Manufacturer, Custom Manufacturer
Distributor of variety of home security systems including security doors, security hardware, chain door alarms. Also bi-fold door sets, 2'6".

Grainger Industrial Supply - Locations
Distributor
Distributor of a wide variety of security alarms including auto theft, back-up, battery powered, burglar, personal protection & visual alarms. Other alarms include sound level monitor alarms, high water alarms, carbon monoxide alarms, multi hazard alarms, water level control high & low alarms, indoor water alarms, closed tank float alarms, oil sensing pump control & alarms, motor control & alarms & more. Services include 24-hour emergency order response services, inventory management services, safety services, repair and replacement programs, hazardous recycling services and storage/material handling equipment services. 1 year warranty.
Brand Names: ABUS

Lord Henry Enterprises - Hermitage, TN
Distributor, Manufacturer
Complete wireless security systems for business or home, silent alarms, security sensors, panic transmitters, selections of fake & real cameras, household alert, motion detectors & emergency dialers, alarm system supplies.

Upbeat, Inc - St. Louis, MO
Distributor, Custom Manufacturer
Distributor of door alarms. Features include mounting hardware & 9 volt battery for operation, choices for the alarm duration are 15, 30 & 180 seconds or continuous, installed on or next to any emergency door. Available in red & green.

3iProtect - Doylestown, PA
Distributor, Manufacturer, Service Company
Installation & service of surveillance/security alarm & camera systems including: front door/entrance alarms, theft & vandalism alarms for commercial, industrial, warehouse & residential applications.