选型表
   FR12      -     G12     H     G      P      R    C                 详述

   FR12      -                                         FR12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 螺纹

                                 G                     直流24V ±20%供电

                                        P              PNP输出

                                        N              NPN输出

                                        C              继电器输出

                                               R       常开＋常闭输出（SPDT）

                                                    C  接插件式