Bug Sweep/Counter Surveillance

Modern organizations are almost entirely valued by their client portfolio, research, intellectual property and marketing abilities - all subjects of discussion in important meetings!
National Investigations, Inc. have counter surveillance specialists who attack the threat of commercial espionage by protecting your important business facilities from the eavesdropping threat, giving both you and your clients the highest assurance of confidentiality.
We check for bugs and spy ware (inc. keystroke loggers) that use radio, telephony and data networks to transmit stolen business information to unauthorized parties. Whenever we discover problems, we act quickly and decisively - confidentially advising client management and working to minimize and manage the risk.
We enhance our counter surveillance services with physical security reviews that are designed to highlight  vulnerabilities in building access controls.  We also check the effectiveness of perimeter security mechanisms.

Counter Surveillance Services

National Investigations, Inc. provides expertise in the detection of, and protection from, all forms of electronic eavesdropping. Our counter surveillance services considerably mitigate the risk of loss of your most important business information through espionage.
From physical protection, through staff management and human resources, to complex uses of information technology, National Investigations, Inc .provides tailored counter surveillance services that put our clients first.
We offer a package of technical inspections to suit your needs, including the facility to monitor and safeguard live meetings, covertly alerting you to an unauthorized surveillance attempt.


Our Technical Surveillance Counter Measures (TSCM) – ‘Bug Sweeping’ services include:

  • Radio frequency spectrum analysis to detect transmitting eavesdropping devices (bugs).
  • Computer scans searching for spy ware and Trojans such as keystroke loggers.
  • Detection of buried or inactive electronic circuitry.
  • Telephony and cable inspections to locate the presence of listening devices or modifications that allow bugging.
  • Use of specialist infrared detection equipment to locate eavesdropping devices using invisible light as a transmission medium.
  • Detection and security testing of wireless networks (Wi-Fi).




  • All investigations will be conducted within the compliance of the law to avoid entrapment, invasion of privacy, misrepresentation, and trespassing.
  • Our fees will remain within your specific budget.
  • There will never be any fee for consultations.
  • Our investigators will be available to testify in front of a judge, jury, hearing or an arbitrator.