CAT Corrugation Analysis Trolley

Corrugation Analysis Trolley - CAT

The CAT is a portable, hand-operated instrument that weighs less than 20kg in its carrying case. It is typically used for quality assurance of rail reprofiling works and to measure acoustic roughness of rails.


The bi-CAT is a portable instrument that can be used by one person to measure two rails simultaneously. The accuracy is the same as that of a CAT.

Rail Corrugation Analyser - RCA

RCA measures irregularities, in particular rail corrugation, from a vehicle. The RCA was initially designed for use on grinding trains at typical speeds of 3-15km/h.


The YRCA is compact, self-contained measuring equipment that is suitable for mounting on a trolley or vehicle. It is typically used at speeds of about 15km/h.

TriTops Wheel Measurement

TriTops has been developed to measure irregularities on wheels that are of interest for vehicle maintenance and wheel/rail noise. These irregularities include acoustic roughness, corrugation and out-of-round.

When measurements matter

RailMeasurement Ltd is a leader in the development and manufacture of equipment to measure rail profile, corrugation and acoustic roughness. Our equipment is amongst the most accurate available. It includes a hand-held trolley that can be used by a single person and compact, self-contained units that can be mounted on a variety of railway vehicles. Our equipment has been thoroughly tested, widely validated and is demonstrably accurate, robust and reliable.

Dr Stuart Grassie

Dr Stuart Grassie

Dr Grassie has worked on rail corrugation as an academic, consultant and in industry for over 40 years. He has undertaken consultancy in several areas of vehicle/track interaction, including rail corrugation, rail defects such as RCF and studs, wheel/rail noise and reprofiling. His work, including review papers on corrugation with Dr Joe Kalousek in 1993 and a sequel in 2009, is widely referenced in the field.

Maurice Verheijen

Maurice Verheijen has more than 20 years’ experience in operation, quality control and maintenance of rail reprofiling equipment. He has been instrumental in the development and practical implementation of innovative rail reprofiling technologies and novel measuring equipment.

Maurice Verheijen