HBL Power Systems Ltd offers Audio Frequency Track Circuit. HBL Power Systems Ltd is accredited with ISO 9001:14001 certified company. The Audio Frequency Track Circuitare used to detect the presence of a train on a track. They are designed to monitor long track lengths on jointless rails.
The Audio Frequency Track Circuit is also suitable for use even in AC or DC electrified areas where high levels of electromagnetic interference are encountered. The system is also designed to handle interference from traction return currents in electrified sections.