PCB Piezotronics, Transmitter, models:

682A06	Installation And Operating Manual
682B03	Installation And Operating Manual
IMI SENSORS 640B01	Installation And Operating Manual
IMI SENSORS 682B13	Installation And Operating Manual
IMI SENSORS 682C03	Installation And Operating Manual
IMI SENSORS HT640B01	Installation And Operating Manual
IMI Sensors 682C33	Installation And Operating Manual