technical surveillance camera lense

Technical Surveillance

What is Technical Surveillance?

Technical surveillance is a form, or forms of surveillance where a data capturing device is required to assist an investigator in completing his or her investigation. Such devices come in various forms and are selected to maximise collection of relevant data. In other words, choosing the right tools for the right job. Technical surveillance devices are usually deployed discreetly and out of view to the naked eye to ensure they function without interference from third parties or the data subject. However, technical surveillance devices (or bugs) can be discovered by equipped and determined investigators trained in the field of Technical Surveillance Counter Measures (TSCM, bug sweeping). It must be stressed that technical surveillance devices should only be used where there is a lawful basis and legitimate interest to ensure privacy laws and data protection laws are adhered to at all times.

GPS Vehicle Trackers

Private investigator GPS Vehicle Trackers

GPS vehicle trackers are used to monitor a vehicles movements and locate its whereabouts. Trackers are a highly effective piece of technical surveillance equipment as they can save a surveillance operation (which the client has likely paid a lot of money for) from coming to an abrupt end. Sentry Investigations Ltd use GPS vehicle trackers as an aid to surveillance in order to prevent losses of contact with vehicles we are physically following. Loss of contact during surveillance is a very real possibility, but with the use of a GPS vehicle tracking device, this possibility is extinguished.  We follow guidance and best practice procedures for the use of GPS vehicle trackers as documented by the Association of British Investigators. This is to ensure our operations are conducted ethically whilst adhering to UK privacy laws. To find out more about this service, please visit our GPS Vehicle Tracking page. 

Static/Unmanned Cameras

Static cameras are an excellent form of technical surveillance equipment. Technology has come a long way over the past few years and it has enabled us to deploy these covert cameras for weeks, if not months on end without the requirement of an external power source due to its internal battery capacity. They can discreetly lay dormant over long periods of time and then record in high definition as soon as it detects any movement. Much like the security door bells we are seeing more of, only these cameras do not require a Wifi signal. They actually run off a 4G network allowing us to be notified on our phones which we can view as a live stream anywhere in the world. 

Recently, we have been deploying static cameras more and more often. They are a cost effective way for certain clients to receive the information they are seeking as they can replace the need for more expensive manned surveillance operations. Static camera deployments can be utilised for a whole host of legitimate reasons, but they are a perfect solution for catching cheating partners bringing home 'other partners'. They can even tell you when the 'other partner' leaves the home. A surveillance operative could be compromised gathering this sort of information, whereas it is highly unlikely one of these discreet cameras will be found.

Private investigator covert camera
Listening Devices
Technical Surveillance Listening Device

Listening devices are a tool used to gather evidence of conversations. They are typically small in size and can come with various functions such as 'standalone' where the device has an internal memory and does not emit any signal. The devices are more difficult to locate during a TSCM bug sweep, but not impossible. Other devices do emit a signal where operatives can dial into the device and listen to the conversations as they are happening. They often do not use much power when in operation so they can remain dormant for very long periods of time. 

As with all technical surveillance devices, listening devices must only be utilised in certain circumstances where there is a legal basis and not to invade in peoples personal privacy. Within the corporate sector, listening devices can and are used to evidence suspected industrial espionage. This method of evidence gathering would be deemed proportionate to the situation and can protect a company from going under. Private sector circumstances may include infidelity within a relationship providing permission from the home or property owner is given to the investigator to deploy such a device. In any case, a client should always seek professional advice prior to the use of this and any technical surveillance service to avoid any serious legal repercussions. 

Find Out More

If you wish to find out more about the technical surveillance solutions we can offer, get in touch with Sentry Investigations Ltd today. We offer a free no obligation consultation for the use of our services, and we give guidance on how best to proceed with your investigation. 

Call us on 01217691626 or 07730695853

Email us at

Private investigator Birmingham