Introducing “Passive Security Scan”

A Firearm and Contraband Detection System

An idea that has matured to specifically meet the needs for elementary, secondary, and university school safety. The system was purposely designed to meet the cost effective criteria for public and private schools, medical dispensaries, and other multi-entrance facilities in need of secure zones. The versatility of the system allows for covert installation around a doorway frame, with no visual presence. It can also be deployed using portable battery power, providing well over 180 hours of service, depending on the battery pack option purchased. Contrary to the current market, the Passive Security Scan system emits no electromagnetic energy or other harmful radiation.


Passive Security Scan utilizes the newest passive weapons sensing technology available today. Its sensors read the constantly changing local magnetic variations due to the Earth’s magnetic field properties. The system creates a virtual “invisible curtain” for secure zone entrances. Due to the dynamic nature of Earth, the system self calibrates to establish ambient baseline readings, which are then distorted when weaponry or other contraband is present during screening envelope.

“In designing this new safety system, it was necessary to reject current hardware and software designs to allow the flexibility in designing a firearms and contraband detection system that will meet varying public and private school safety needs in cost and usability.” excerpt: White Paper by R. Fluck”
“This system can operate in stand-alone mode, or it can be controlled and monitored, via a desktop or laptop computer via USB or Bluetooth, or with your Android Smartphone or tablet.” excerpt: Article by R. Fluck


“…schools should randomly draw classroom numbers and search every student in the selected classroom. This approach provides an element of surprise, which discourages students from bringing weapons to school.” excerpt: Mike Dorn, executive director for Safe Havens International


“It was once said that “It is better to tell the truth than tell a lie”, “It is better to know than not to know”…However, in the case of my “knowing” of the Passive Scan system and knowing that, had this cost-effective and state-of-the-art wonder of technology been deployed and operational on December 14th at a school in Newtown, Connecticut called Sandy Hook Elementary School, little souls and seven adult souls might not have been released to their creator before their time.” excerpt: Capstone by C. Alexander


The existing systems currently on the market utilize active scanning, meaning that they emit radiation using various wavelengths, such as X-rays and millimeter microwaves. In these systems, a signal is emitted from one side of the scanner to the other side of the scanner, passing directly through the patron being scanning. They then read the variation, or loss of transmission, from the “sent” to “received” sides, much in the same way as an X-ray machine emits X-rays though an object, like a broken arm, to expose the film on the other side of the arm. While these scanning technologies are commonly used, there is no evidence to support that they are safe. There are many studies that identify the long-term effects of this technology, which has been shown to have caused cancer in other applications.

It has been widely speculated that a subject who repeatedly passes through such a system can be seriously affected, as cited in the New York Times on January 2010, “The plan for broad use of X-ray body scanners to detect bombs or weapons under airline passenger’s clothes has rekindled a debate about the safety of delivering small doses of radiation to millions of people” — a process some experts say is certain to result in a few additional cancer deaths.”

These scanners are called “backscatter scanners” and some radiation experts believe the amount of radiation is minimal and creates negligible risk, other experts agree that collective exposure could incrementally increase the risk of fatal cancers in those who are frequently exposed to even small amounts of radiation. In a 2002 report on the safety of backscatter scanners, the National Council on Radiation Protection and Measurements, which is influential in setting regulatory standards, said it “cannot exclude the possibility of cancer, attributable to radiation of this type, in people, repeatedly exposed to very low doses of radiation.”

Passive Scan Gateway


“The modular approach to manufacturing and the cost savings realized through component selection, allows the system to be offered to the industry at a cost well below currently available metal detection devices.” excerpt: White Paper by R. Fluck


“I am sure many of you have done childhood experiments, using a bar magnet placed under a piece of paper, and then sprinkled iron filings on top of the paper. Remember the almost bubble like lines that appeared that were produced by the poles of the magnet. These lines also exist on earth, which can be thought of as a very large magnet. Now, consider these magnetic lines around the earth as a fog. We are tuned to this fog, and any item that is surrounded by its own magnetic field, like a firearm, will produce a hole in this fog. This is what we detect. The holes in the fog.” excerpt: presentation by R. Fluck
Being tuned to the Earth’s magnetic field allows us to see interruptions by firearms and other contraband.


“…there is still the unresolved issue of what can be done to eliminate shootings by firearms in our public school systems to the very best of our abilities. The problem seems clear enough. These acts, as unconscionable as they may be, have been tolerated far too long by a society that would quickly assign blame to the perpetrator’s state-of-mind, or to the business that sold the firearm to the perpetrator to begin with. And while there is enough blame to go around regarding both philosophies of thought, the focus always seems to be on the problem post the event and not on a long-term resolution to the problem. We have the technology currently in place to prevent such acts and to hold those accountable who would seek to premeditatedly commit such acts before any loss of life could occur when it clearly could be prevented.” excerpt: Capstone by C. Alexander
School Shootings in America Since Sandy Hook . Image from:


A comparison of “Passive Security Scan” with other metal detectors on the market today.
A 2005 demonstration video showing the capabilities and operational interface of the Passive Scan Model ES3.
A 2018 demonstration video of the newest version of Passive Security Scan now available for purchase.

Android tablet control application for “Passive Security Scan”

Passive Security Scan is manufactured under exclusive license by Passive Security Scan, Inc. Passive Security Scan Inc. was formed in 2017 to bring products to market in the areas of personnel and collateral protection. The company currently has several products in development that will change the face of their respective industries. Passive Security Scan, Inc. is a wholly owned subsidiary of Defense Technologies International Corp., who is a publicly traded company under the symbol DTII. For more information about the “Passive Scan” firearm and contraband system for your schools, please visit:

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