PS21                                           PS21系列机械式可调压力开关
                                                    测量范围：
               03                                         0.03...0.3MPa
                                                    测量范围：
               04                                          0.1...0.4MPa
                                                    测量范围：
               05                                         0.06...0.6MPa
                                                    测量范围：
               06                                         0.5...1.5MPa
               07                                   测量范围：
                                                           0.1...1.3MPa
                                                    测量范围：
               08                                          1.6...4.0MPa
                                                    测量范围：
               09                                          0.4...2.8MPa
                                                           4.1...7.0MPa
               010                                  测量范围：
               011                                         2...25MPa
                                                     测量范围：
                                                    测量范围：
               012                                         4...40MPa
                      S                              20#钢底座
                            G14                     接口螺纹 G14
                            N14                     接口螺纹 NPT1/4

                            M12                     接口螺纹 M12x1.5

                            M20                     接口螺纹 M20x1.5

                                   H                接口螺纹 外螺纹

                                          F          接口螺纹 内螺纹
                                                R   常开+常闭输出