Autronica manual call point with SelfVerify function. Approved for use in hazardous areas. For use in harsh environmental conditions. Up to 2 x M20 cable glands. The BF-502/EX is a manual call point for use in hazardous area zone 0, 1 or 2. It must be connected to the approved AutroSafe barrier BZ-500. The call point has been designed for use with Autronica's interactive fire alarm system called AutroSafe and consists of the SelfVerify function. This function ensures the highest grade of reliability and the lowest degree of manual testing, because all units comprising this function are automatically self-tested once every 24 hours. The high IP degree and mechanical strength of enclosure makes the call point suitable for outdoor applications in industrial, maritime and off-shore installations. The BF-502/EX must be installed according to local regulations which normally means along escape routes, landings and exits.