AVA SYSTEM recommends and offers APK (Periodic Control Agreement) or APS (Periodic Service Agreement) at all operating facilities. This means a planned and systematic annual inspection / service of all key functions such as software, connections, sensors and sensor cables. In the same way that we carry out a periodic check of the car and assume that this is crucial for operational reliability and stability in daily life, the same naturally applies to technical systems. Systematic and professional inspections are especially important for systems that will necessarily have to have sensors placed in harsh and technically challenging environments. Regardless of system, technology and supplier, any alarm system will quickly lose its value and credibility with the increasing number of false alarms.