Quotations are hereby invited for the following: Provision of ultrasonic measuring car services in the Metrorail Gauteng Province on an "as and when" required basis for a period of 12 months. Scope: 1. A single vehicle Test Car fitted with the state of the art RFAS 2100 Ultrasonic Rail Flaw Analysis System to execute the rail defect detection services. The vehicle is to be fitted with a turntable to enable bi-directional testing of track and fast turning around in a track section. 2. The test carriage at the rear of the vehicle must have two (2) Roller Search Units (RSU’s) on each rail providing a 10 probe channel configuration consisting of: • 6 x 70º crystals: Three (3) forward and three (3) reverse scanning to cover the full rail head; • 2 x 37º crystals: One (1) forward and one (1) reverse scanning to cover centre of rail top to bottom); • 2 x 0º crystals: One (1) positive gated pulse echo zero and one negative gated geometry to cover centre of rail top to bottom). (投標 №80442847cn)