Circuit for normally closed /opened rely contacts,have good quality ,easy operate,simple installion.

smoke alarm is that to prevent fire.They have own perfect quality, attractive appearance, steady performance,ect.

                                 smoke alarm  AK-218A2
Description:
* Power Source : 9V battery,12VDC/24VDC
* Operating Current : 10 uA (normal) and 20-50 mA(alarm working)
    KM 53166.
    0.81~1.42%/FT

    Operating Temperature: 40oF - 100oF (4. 4C - 37.8oC)

    Ambient Humidity : 10% - 90%.
    Horn Level: 85 Decibels at 10 feet.
* Battery life:1 year 
* Interconnecting Gas detector  
  (1)Circuit for normally closed rely contacts
  (2)Circuit for normally opened rely contacts
  (3)Operating Frequency: 433 MHZ/315MHZ (optional)
* Size:105mm*25mm
* Weight:150g/pc
* Package size:58.5cm*42.5cm*30.6cm
* Quantity/Box:80pcs
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Welcome to China and visiting our factory!There are four models for smoke detectors in our factory,if you want to know more informations,please contact joy,thanks.