Technical Surveillance Countermeasures (TSCM) are in wide use in both Government and corporate sectors, as defensive manoeuvres to the very real threat of eavesdropping.  Our innovative Lockhart TSCM kit is a complete TSCM sweep system with a user-friendly interface that minimises training time and maximises efficiency.

By utilizing our experience of attacking covertly and working closely with Government technical counter measures teams, we developed Lockhart, the heart of our technical surveillance counter measures equipment.

Lockhart Complete Collection

• Lockhart RF
• Lockhart Conducted
• Lockhart Optical
• Surface Scanner
• UV torch and Pen
• 12 x AA Batteries
• 3 x Antennas for Lockhart RF
• 3 x Attenuators for Lockhart RF
• Mains, RJ45, telephone cables
• Headphones


A broadband signal detector which displays its results in both amplitude and time domains, offering an entirely new method of detection and analysis. Based around a state-of-the-art logarithmic amplifier it is especially useful for detecting and identifying pulsed signals.

Furthermore, the internal analysis software will identify Time Domain Multiple Access signals in real time.

This enables GSM transmissions, very commonly used for cheap, quick plant eavesdropping devices, to be quickly identified and located, as well as identifying bluetooth and DECT transmissions. Version available with audio output.

LOCKHART Conducted

Detects high frequency signals on infrastructure wiring, providing an easy to use capability for scanning mains and data cabling to identify unwanted or hostile signals.

It comprises a broadband detector with a frequency response exceeding well beyond 10MHz enabling it to detect signals which cannot be detected with broadband field-strength meters.

The detector will display its output both in time and frequency domain using a split screen. With a DSP-based Fast Fourier Transform Spectrum Analyser it has a dynamic range of 80dB and sees clearly even the smallest carrier signals. The time domain display clearly shows the pulsed signals which the analyser may find difficult.


Detection of optical emissions which may contain intelligence is straightforward using the new Lockhart optical detector. Based around state-of-the-art indium, gallium, arsenide & silicon sensors the detector will capture emissions up to 1.7μm – well above the capability of silicon sensors alone.

Visible light and near-IR signals are detected by conventional silicon sensors to give coverage of all likely emitting sources. The signals are displayed in a unique rolling time-domain format coupled with a spectrum analyser which will give clear indication of any modulation content of the signals.

It is also equipped with an audio output to give the operator audible warning of signals and signal strength.


The time domain display feature common to the Lockhart TSCM devices allow them to be used as portable “sweeping” devices for searching rooms prior to meetings or as a permanent monitor of a room to detect if hostile devices are being brought into a room following a professional TSCM sweep.

All devices use standard AA batteries, available all around the world. Standard one-year warranty applied to all equipment.

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