EntityQ1150115· pop 16· linked from 270 articlestrack circuitSign in to saveelectrical device used to detect the presence of trains on rail tracksConnectionsrailway trackEntityaxle counterEntityUnited StatesCountryAustraliaCountryUnited KingdomCountryCzech RepublicCountrytrainEntityInternational Standard Book NumberEntityresistorEntitylocomotiveEntityalternating currentEntitydirect currentEntitystainless steelEntityGeneral ElectricCompanyimpedanceEntityrelayEntityFaraday's law of inductionEntityShanghai MetroEntityAlstomEntityrolling stockEntityCategoriesTrain detection systems