CompuDyne Corporation First Quarter 2004 Earnings Conference Call.

Business Editors

HANOVER, Md.--(BUSINESS WIRE)--April 15, 2004

CompuDyne Corporation (NASDAQ:CDCY) will host a conference call and simultaneous webcast of its 1st Quarter 2004 results on Friday, May 7th, 2004 at 9:00 AM Eastern Standard Time.

This call is being webcast by CCBN and may be accessed at CompuDyne's website at: www.compudyne.com Go to the Investors Relations tab and click on the Event Calendar tab.

Or go directly to:

http://phx.corporate-ir.net/phoenix.zhtml?c=62198&p=IROL-eventDetails&
EventId=878987 (Due to the length of this URL, it may be necessary to
copy and paste this hyperlink into your Internet browser's URL address
field.)

The webcast is also being distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.fulldisclosure.com or by visiting any of the investor sites in CCBN's Individual Investor Network. Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

About CompuDyne

CompuDyne operates within four business segments; each with leading positions in physical and electronic security and technology-based solutions for the public security market. The Institutional Security Systems segment is the world's largest supplier of physical and electronic security products, as well as integration and maintenance services, to the corrections and courthouse markets. The Attack Protection segment is the largest provider of bullet, blast and attack resistant products to U.S. embassies, banks, courthouses and other highly secured facilities in the U.S. and around the world. The segment also designs and manufactures fiber-optic sensors and related systems using optical fiber, proprietary optics and digital signal processing. The Federal Security Systems segment is a supplier of security and specialty engineering services and telecommunications products to the military, intelligence and commercial markets. The Public Safety & Justice segment develops, implements, and supports automated information solutions for public safety and justice agencies worldwide. This division serves government agencies throughout the United States, and is the largest company dedicated to the public safety and justice software market. Public Safety and Justice also includes the division which provides large-scale inmate management and institutional medical software systems.