The non-contact rotating field and rotary tester TV 411 indicates the phase sequence and direction of the rotating field of the external conductor and is especially suitable for service tasks in engine installations and multi-phase networks. The non-contact measurement with the coloured insulated terminals accelerates the service application and minimizes the risk of contacting energized electrically active conductors. The integrated rotary tester also determines by no contact by measuring the changing magnetic field of the direction of rotation of the engine shaft.