OVH Wizard is an ultrasonic overhead contact wire height and stagger measuring unit, which can be installed in under two hours.

Cheaper than laser-based devices, it can be easily mounted on any railway vehicles from 2·75 to 3·75m high. The rugged aluminium beam construction is suited for installation on maintenance machinery, allowing wire heights to be measured before, during and after tamping. It can be used with wires up to 4m high and with a stagger of