Abstract: The railway brake pressure monitor includes a sensor/transmitter unit (STU) and a remote display unit (RDU). The sensor/transmitter unit is mounted on the last vehicle of a railway train and coupled with the brake pipe thereof and includes a pressure transducer (80), an electronic circuit board module (82), a radio transmitter (84) and a battery pack (86). The pressure transducer, the electronic circuit board module, and the radio transmitter are powered by the battery pack, and the electronic circuit board module (which includes a programmed microcomputer (96)) functions to repetitively monitor the pressure transducer to measure the brake pipe air pressure, and to cause the radio transmitter to transmit reports including the brake pipe air pressure, the states of a plurality of external status inputs, and a battery status indication. Report transmission is triggered by various events.