In addition to tested/certified mechanical security devices, the installation of hold-up and burglar alarm systems can be useful.

Installation companies that are included in the address list of the LKA NRW fulfill the necessary formal, personnel and technical requirements of the catalog of obligations and have committed themselves, among other things:

• to plan, install and maintain alarm and detection systems in such a way that intrusion attempts are reported as early as possible and false alarms are largely excluded by taking appropriate measures
• on principle, only use system components/devices for IDS/IDS that have been tested and certified both individually and for proper interaction by a certification body accredited for the field of "hazard detection system technology" (e.g. BSI, VdS)
• comply with the standards, regulations and guidelines listed in the list of duties
• to carry out all project planning, installation and maintenance work in accordance with the specifications in the list of duties by their own specialists who receive regular training
• to submit written and clear offers to the system operators/customers
• to prepare a system description for each installed IDS/IDS in accordance with the requirements of the list of obligations, to sign both copies and to hand over one copy to the operator (of interest to the police)
• instruct the system operator and other persons designated by the operator in the function and operation of the monitoring and alarm system in an appropriate and comprehensible manner
• at the request of the LKA NRW, to have the monitoring and control system inspected together with the LKA NRW

The NRW police assume no liability for the work carried out by these companies