Supply proof manual alarm button devaluation giant Shanghai quantity. Supply fire explosion-proof equipment, the amount of the giant explosion proof manual alarm button, and the supply fire explosion-proof equipment, the amount of giant explosion proof manual alarm button supply fire explosion-proof equipment, the amount of the giant explosion proof manual alarm button, BAL-type explosion-proof manual alarm button genus depressed self-locking non-coding manual alarm button, press the button on the plexiglass piece, light, normally open contact closure alarm signal to the alarm controller or start the alarm device alarm. Button is pressed, the convenient recovery after recovery (with a key). Button and any type of fire alarm controller supporting the use of this product meets the GB3836-2000 standard requirements of production. The button reasonable structure, beautiful shape, reliable performance, easy installation, fire alarm device is a high reliability, strong anti-interference ability. The main technical parameters 1, Ex-mark: Exd Ⅱ BT6 and Exd Ⅱ CT6, temperature range: -20 ℃ ~~ 60 ° C 3, humidity range: less than 95% RH4, Atmospheric pressure: 80 ~ 110Kpa5, contact capacity: 80mA? 6, working voltage: DC24V 7, Dimensions: 120 × 117 × 60mm? installation size: 100mm9 weight??? amount: 0.9 Kg into line caliber 2-M22 × 1.5 (the line number of caliber and size can be designed according to the needs of users production) demand for design and production)