While the standard CAT measures single rails effectively, you may want to save time and energy by measuring two rails simultaneously.
The Bi-CAT uses the same technology as the CAT and essentially the same software to measure rail corrugation and acoustic roughness on both rails simultaneously at a comfortable walking speed of 3km-4km / h (1m / s). The Bi-CAT packs into the same size of plastic instrument case as a CAT, but has an additional plastic box that contains the framework. The total weight of the equipment and carrying cases is less than 28kg.
The Bi-CAT can be used on flat-bottomed (Vignole), embedded or grooved rails.
We expect the main use of the Bi-CAT to be for corrugation surveys and during rail re-profiling work, particularly for those clients who have to collect measurements in a short time window. The equipment was indeed developed at the request of these users.