diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt
index f058d96..aa82faf 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/ParseHelper.kt
@@ -121,7 +121,7 @@ object ParseHelper {
             value = 0f
         }
         // 量程
-        val rangHex: String = HexUtils.byteArrToHex(it, 27, 27 + 2)
+        val rangHex: String = HexUtils.byteArrToHex(it, 25, 25 + 4)
         val rangHexLong: Long = HexUtils.hexToLong(rangHex)
         gasRangeMaxMap[type.desc] = rangHexLong / 100f
 //        // 温度