LogiKey Pocket Coil Detector (Detect Transponder Systems)
The LogiKey Pocket Coil Detector is an inexpensive way to detect if your customer's vehicle has an active transponder system. Simply put a mechanical key into the ignition, place this detector as close to the face of the lock as possible, and look for the detector to light up as you turn the key to the on position. If the lights activate, there is an induction loop present. If it doesn't, the car is not seeking a transponder chipped key. Simple.
Please note that some vehicles will cause the lights on the detector to blink for just a quick moment while other vehicles may keep the lights on for a longer period of time. Watch closely or you may miss it.