diff --git a/MainWindow.xaml b/MainWindow.xaml
index 1440b16..00d1493 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -122,7 +122,7 @@
                                     <ComboBoxItem Content="6.4mm" />
                                 </ComboBox>
                                 <Label Grid.Row="1" Grid.Column="0">初始电阻 R₀ (Ω):</Label>
-                                <TextBox IsEnabled="False" Grid.Row="1" Grid.Column="1" x:Name="txtProbeR0" Text="34.7"/>
+                                <TextBox IsEnabled="False" Grid.Row="1" Grid.Column="1" x:Name="txtProbeR0" Text="12.2"/>
 
                                 <Label  Grid.Row="2" Grid.Column="0">温度系数 α (1/K):</Label>
                                 <TextBox IsEnabled="False"  Grid.Row="2" Grid.Column="1"  x:Name="txtProbeAlpha" Text="0.008"/>
@@ -150,7 +150,7 @@
                                 </Grid.ColumnDefinitions>
 
                                 <Label Grid.Row="0" Grid.Column="0">串联电阻 Rₛ (Ω):</Label>
-                                <TextBox Grid.Row="0" Grid.Column="1" x:Name="txtBridgeRs" IsReadOnly="true" IsEnabled="False" Text="34.7"/>
+                                <TextBox Grid.Row="0" Grid.Column="1" x:Name="txtBridgeRs" IsReadOnly="true" IsEnabled="False" Text="12.2"/>
 
                                 <Label Grid.Row="1" Grid.Column="0">引线电阻 Rₗ (Ω):</Label>
                                 <TextBox Grid.Row="1" Grid.Column="1" x:Name="txtBridgeRL" IsReadOnly="true" IsEnabled="False" Text="0.0267"/>
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index dcf061f..fec015f 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -52,14 +52,14 @@ namespace ConductivityApp
         //private const double DefaultBridgeRL = 0.05;          // Ω
 
         // 探头物理参数（供应商数据 - 探头2）
-        private double DefaultProbeR0 = 34.7;           // Ω，初始电阻
+        private double DefaultProbeR0 = 12.2;           // Ω，初始电阻
         private double DefaultProbeAlpha = 0.008;      // 1/K，温度系数
         private double DefaultProbeRadiusMM = 14;   // mm，探头半径
 
         private int DefaultProbeCoilCount = 27;        // 环数
 
         // 电桥电路参数
-        private double DefaultBridgeRs = 34.7;         // Ω，初始探头电阻（=R0）
+        private double DefaultBridgeRs = 12.2;         // Ω，初始探头电阻（=R0）
         private double DefaultBridgeRL = 0.0267;       // Ω，引线电阻（26.7mΩ）
         private static double r = 0;
         private static double a = 0;
@@ -1953,16 +1953,16 @@ namespace ConductivityApp
                     {
                         if (txtProbeRadius == null)
                             return;
-                        txtProbeR0.Text = "34.7";
+                        txtProbeR0.Text = "12.2";
                         txtProbeRadius.Text = "14";
                         txtProbeCoils.Text = "27";
-                        txtBridgeRs.Text = "34.7";
+                        txtBridgeRs.Text = "12.2";
                         txtBridgeRL.Text = "0.0267";
-                        DefaultProbeR0 = 34.7;           // Ω，初始电阻
+                        DefaultProbeR0 = 12.2;           // Ω，初始电阻
                         DefaultProbeRadiusMM = 14;   // mm，探头半径
                         DefaultProbeCoilCount = 27;        // 环数
                         // 电桥电路参数
-                        DefaultBridgeRs = 34.7;         // Ω，初始探头电阻（=R0）
+                        DefaultBridgeRs = 12.2;         // Ω，初始探头电阻（=R0）
                         DefaultBridgeRL = 0.0267;       // Ω，引线电阻（26.7mΩ）
                         break;
                     }