详细说明：

选型表

   FR11       -    G12     H      D      P      P    Q                 详述

   FR11      -                                          FR11系列 电子式流量开关 （传感器）

                   G12                                  接口螺纹G1/2

                   G14                                  接口螺纹G1/4

                           H                            接口螺纹外螺纹

                                  D                     直流24V±20%供电

                                  W                     交流230V±15%供电

                                         P              PNP输出

                                         N              NPN输出

                                         C              继电器输出

                                         A              4 20mA输出

                                                R       常开＋常闭输出(SPDT ）

                                                -       4 20mA输出

                                                     Q  接插件式

                                                     C  直接附线式