The next generation of wireless security

Find the contraband phones that shouldn’t be there

Detection, location and screening equipment for prisons, government, defence and schools, supplied and supported from the UK and USA.

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MailSecur screen showing a handgun inside a sealed hard case — Handgun found in a sealed hard case

New to L&G · Mail screening

MailSecur®: see inside mail without opening it

Synthetic drugs now arrive soaked into ordinary letters, books and legal documents, and staff can't see them by eye. MailSecur's terahertz (T-ray) imaging shows what's inside sealed mail in real time, so treated paper, powders, phones and weapons are found before anyone opens the post.

9 of 9US DHS mail threat categories detected. X-ray detects 3.
3,021treated papers found by the Texas Department of Criminal Justice
43.1 kgabout a tenth of the weight of an X-ray unit

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The scale of the problem

Contraband phones are a growing problem in secure facilities

phones recovered by the BOP across federal facilities

of federal inmates may have access to contraband phones

M+

spent yearly on staffing & investigations

K+

phones across 20 US state prisons

Hunter wireless detection and location system

RF Detection Solutions for Secure Facilities

Illicit cell phone use is a growing threat in secure environments such as correctional facilities, government installations, and sensitive infrastructure. Our advanced RF detection technology provides real-time monitoring, alerts, and actionable intelligence to ensure facility integrity and prevent unauthorised communication.

Why RF Detection Matters

In an age of miniaturized electronics and covert communication methods, traditional security protocols are no longer enough. Smuggled cell phones are being used to:

- Coordinate criminal activity from inside prisons

- Leak sensitive government or corporate data

- Undermine institutional security protocols

RF detection systems provide a non-invasive, passive, and highly effective solution by identifying the radio frequency signatures of unauthorised devices — even when not actively in use.

How a search works

Detect, locate, act

STEP 1

Detect

Survey an area and flag every transmitting phone, Wi-Fi hotspot or Bluetooth device.

STEP 2

Locate

Follow the signal with a directional antenna, or screen people with a ferromagnetic detector that finds phones even when switched off.

STEP 3

Act

Recover the device and keep a timestamped record to support your investigation.

Key Features of Our RF Detection System

- Real-Time Detection: Identify and locate active RF signals from cell phones and contraband wireless devices.

- Non-Intrusive Monitoring: Detect threats without manual searches. Includes fixed systems and handheld devices for quick, targeted sweeps.

- Instant Alerts & Reporting: Customizable alerts sent to control centers or cells.

- Seamless Integration: Works with existing security platforms and video surveillance systems.

- Precise Geolocation: Pinpoint signal origins down to rooms or cells.