Nitgen Finkey biometrical is a very competitive device with a lot of services. You could install it outside, withe IP65 protecction. It has a fast software, big RAM memory, different designs and registers.
The vehicle sensor detects a big metal weight inside a limit area. The device detects since bike, motorbike until industrial vehicles. Power supplier could be 12/24 V or 230 VAC. It could be use like security element.