[ RadSafe ] Vertec the manufacturer of the Bleeper, which is distributed in the US by Fluke

[ROY HERREN]

http://www.flukebiomedical.com/biomedical/usen/radiation-safety/Personal-Dosimetry/05-106-Bleeper-mR-radiation-monitor.htm?PID=54269
05-106 Bleeper mR Radiation Monitor 
http://www.vertec.co.uk/content/personal_protection.php
   Roy Herren