Portable Skid Resistance Tester is an essential tool for anyone with a duty to minimise the risk of accidents arising as a result of slippery roads and floor surfaces. Originally developed by the Transport and Road Research Laboratory of Great Britain.


This instrument is also used to investigate the cause of accidents after they have taken place. The CRT-PENDULUM measures the frictional resistance betweena rubber slider mounted on the end of a pendulum arm and the test surface. This provides highway engineers with a routine method of checking the resistance ofwet and dry surfaces to slipping and skidding, both in the lab and on site. It is based on the Izod principle: a pendulum rotates about a spindle attached to a vertical pillar. At the end of the tubular arm a head of known mass is fitted with a rubber slider. The pendulum is released from a horizontal position so that it strikes the sample surface with a constant velocity. The distance travelled by the head after striking the sample is determined by the friction of the sample surface. Areading of Skid Resistance is obtained.

Key Features

  • Designed for laboratory and in situ road surface testing
  • Dispatched calibrated to EN1097-8 (accredited under ISO 9001:2000)
  • Low friction arm, and lightweight pointer
  • Comes with integral ‘F’ scale for use with small slider set for 76mm slide length. (PSV test)
  • Repeatable and reproducible ?Supplied with robust carrying case
  • Made in the United Kingdom

Key Uses

  • Assessment of surface friction and skid resistance properties
  • Testing of aggregates in the PSV (Polished Stone Value) test
  • Testing of new road surface materials under development
  • Testing of pedestrian walkways
  • Traffic accident investigations
  • Litigation investigations
  • Testing of pavers in the Flat Bed Polisher


  • EN 1097-8:2009
  • EN 1436:1997
  • EN 13036-4:2003
  • ASTM E303-93
  • AS/NZS 4586:1999
  • BS 812 Pt 114
  • BS 6077 Pt 1
  • BS 7044
  • BS 7188
  • BS 8204
  • BS 7976