1. 
   Axle counter
   An axle counter is a device on a railway that detects the passing of a train in lieu of the more common track circuit. A counting head (or `detection point`) is installed at each end of the section, and as each axle passes the head at the start of the section, a counter increments. A detection poin...
   Found op http://en.wikipedia.org/wiki/Axle_counter
   
   
2. 
   Axle counter
   method of train detection as alternative to Track Circuit
   Found op http://www.scot-rail.co.uk/page/Glossary
   
   
3. 
   axle counter
   a system using counting points and a counter which detects the occupancy of a section of track by comparing the number of axles which enter the section with the number of axles which leave the section, parity of the numbers being necessary to give a clear indication
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=821-03-41
   
   

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