300 series

      System sensor's 300 series photoelectronic smoke detecotrs features a plug-in wiring system with 12 and 24 volt operation in one aesthetically pleasing housing design. All models contain a patented optical chamber for exceptical reliability . Installation is simple and cost effective -prewire the plug-in terminal block and sanp the detector into place. Two-and four -wire models are available.
      300 series has twelfth unique features. The first one is 12/24 VDC operation in one unit. The second one is 2-wire and 4-wire models available . The third one is aesthetically pleasing housing design. The forth one is geometrically optimized photoelectronic sensing chamber. The fifth one is visual alarm and power indicator. The sixth one is plug-in terminal block for easy installation and maintenance. The seventh one is optional supervised electronic thermistor heat sensors rated at 135F.The eighth one is built-in test switch. The ninth one is field sensitivity metering of detector to meet the requirments of NFPA 72 . The tenth one is easy miantenance-replaceable inset screen. The eleventh one is built-in tamper-resistant feature. The twelfth one is 3-year warranty.
      There are some spacifications about 300 series. Operating temperature range : That oof non-thermal models is 0 to +49; That of thermal models is 0 to 38 . Operating humidity range is 10% to 93% relative humidity noncondensing . Sensitivity is 3%(+6/-7) per foot obscuration. Wiring is 14-22 AWG, twisted pair recommended. Heat sensor is 135°F fixed temperature electronic thermistors(2).
      There are many different kinds of 300 series , adn they  have some different sepecifications. If you are interested in it and want to know more about 300 series, please pay more attention to our web ! Thanks for your attention to our information!