Types of Intruder Alarm SystemWired SystemsWireless Intruder AlarmsSignallingBells OnlyMonitored SystemAlarm GradingTypes of DetectionDoor & Window ContactsMotion SensorsPanic AlarmsGlassbreak DetectorsVibration DetectorsAdditional FeaturesSounders & StrobesSmokeCloak SystemRemote KeypadsVibration DetectorsThese sensors detect movement and can be used on windows and doors, or on freestanding objects such as ATMs, vending machines and filing cabinets.