Loop Vehicle Sensor and Detector for Safety and Exit for Gates and for Traffic Signal Controls With Visual and Audible Feed Back 12-24 Volt AC-DC Universal Works With All Types of Systems -
Safety Loop Installation - PTI Security Systems
Single Way Vehicle Loop Detector Vehicle Loop Detector For Garage Door Opener, Swing Gate, Sliding Gate, Barrier Gate - Access Control Kits - AliExpress
Induction Loop For Electric Gates Vehicle Parking Barrier - JUTAI
Loop Detector
Barrier Gate With loop detector & beam sensor. - YouTube
Loop Detectors and Driveway Loops
LED Dual-Beam Vehicle Detector/Traffic Detector/Loop Detector for Barrier Gate - China Traffic Detector, Loop Detector | Made-in-China.com