diff --git a/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt b/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
index f88cda7..ab4f3ae 100644
--- a/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
+++ b/app/src/main/java/com/casic/app/safetreecontroller/fragments/MethaneMonitorFragment.kt
@@ -133,7 +133,7 @@
             val message = weakReferenceHandler.obtainMessage()
             message.what = LocaleConstant.UPDATE_GAS_THRESHOLD_CODE
             //用户使用【%LEL】，但是单片机只能设置【ppm·m】，所以需要转换一下
-            message.obj = (threshold * 10000).toInt()
+            message.obj = (threshold * 500).toInt()
             weakReferenceHandler.sendMessage(message)
         }