Vtg Advanced Devices Lab Microwave Intruder Detector Security Electronics AntennVtg Advanced Devices Lab Microwave Intruder Detector Security Electronics Antenna model 3019. Key aspects of this device: Functionality: It uses microwave beams to detect movement and trigger alarms. Advanced Technology: The seller on eBay notes that these detectors were once considered cutting edge security technology, used in high security applications. Seller Information: The device is available for sale on eBay from Butler, Pennsylvania.