diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
index 1808c34507..cc98bbb711 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/Plugins/SensorRepeat.cs
@@ -160,7 +160,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
             ts.arc = arc;
             ts.host = host;
 
-            ts.next = DateTime.Now.ToUniversalTime().AddSeconds(ts.interval);
+            ts.next = DateTime.UtcNow.AddSeconds(ts.interval);
 
             AddSenseRepeater(ts);
         }
@@ -196,14 +196,20 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Plugins
         public void CheckSenseRepeaterEvents()
         {
             // Go through all timers
-            foreach (SensorInfo ts in SenseRepeaters)
+
+            List<SensorInfo> curSensors;
+            lock(SenseRepeatListLock)
+                curSensors = SenseRepeaters;
+
+            DateTime now = DateTime.UtcNow;
+            foreach (SensorInfo ts in curSensors)
             {
                 // Time has passed?
-                if (ts.next.ToUniversalTime() < DateTime.Now.ToUniversalTime())
+                if (ts.next < now)
                 {
                     SensorSweep(ts);
                     // set next interval
-                    ts.next = DateTime.Now.ToUniversalTime().AddSeconds(ts.interval);
+                    ts.next = now.AddSeconds(ts.interval);
                 }
             }
         }